[cherry-pick][Bugfix] Disable monolithic TRTLLM MoE for Renormalize routing (#37591)#37605

Signed-off-by: khluu <khluu000@gmail.com>

.buildkite/hardware_tests/amd.yaml

@@ -10,7 +10,7 @@ steps:
       docker build
       --build-arg max_jobs=16
       --build-arg REMOTE_VLLM=1
-      --build-arg ARG_PYTORCH_ROCM_ARCH='gfx942;gfx950'
+      --build-arg ARG_PYTORCH_ROCM_ARCH='gfx90a;gfx942;gfx950'
       --build-arg VLLM_BRANCH=$BUILDKITE_COMMIT
       --tag "rocm/vllm-ci:${BUILDKITE_COMMIT}"
       -f docker/Dockerfile.rocm

.buildkite/hardware_tests/cpu.yaml

@@ -21,6 +21,20 @@ steps:
       pytest -x -v -s tests/kernels/moe/test_cpu_fused_moe.py
       pytest -x -v -s tests/kernels/test_onednn.py"
 
+- label: CPU-Compatibility Tests
+  depends_on: []
+  soft_fail: true
+  device: intel_cpu
+  no_plugin: true
+  source_file_dependencies:
+  - cmake/cpu_extension.cmake
+  - setup.py
+  - vllm/platforms/cpu.py
+  commands:
+    - |
+      bash .buildkite/scripts/hardware_ci/run-cpu-test.sh 20m "
+      bash .buildkite/scripts/hardware_ci/run-cpu-compatibility-test.sh"
+
 - label: CPU-Language Generation and Pooling Model Tests
   depends_on: []
   soft_fail: true

.buildkite/image_build/image_build_cpu.sh

@@ -25,9 +25,7 @@ fi
 docker build --file docker/Dockerfile.cpu \
   --build-arg max_jobs=16 \
   --build-arg buildkite_commit="$BUILDKITE_COMMIT" \
-  --build-arg VLLM_CPU_AVX512BF16=true \
-  --build-arg VLLM_CPU_AVX512VNNI=true \
-  --build-arg VLLM_CPU_AMXBF16=true \
+  --build-arg VLLM_CPU_X86=true \
   --tag "$REGISTRY"/"$REPO":"$BUILDKITE_COMMIT"-cpu \
   --target vllm-test \
   --progress plain .

.buildkite/lm-eval-harness/test_lm_eval_correctness.py

@@ -13,9 +13,10 @@ import os
 from contextlib import contextmanager
 
 import lm_eval
-import numpy as np
 import yaml
 
+from vllm.platforms import current_platform
+
 DEFAULT_RTOL = 0.08
 
 
@@ -63,6 +64,9 @@ def launch_lm_eval(eval_config, tp_size):
         "allow_deprecated_quantization=True,"
     )
 
+    if current_platform.is_rocm() and "Nemotron-3" in eval_config["model_name"]:
+        model_args += "attention_backend=TRITON_ATTN"
+
     env_vars = eval_config.get("env_vars", None)
     with scoped_env_vars(env_vars):
         results = lm_eval.simple_evaluate(
@@ -102,6 +106,8 @@ def test_lm_eval_correctness_param(config_filename, tp_size):
                 f"ground_truth={ground_truth:.3f} | "
                 f"measured={measured_value:.3f} | rtol={rtol}"
             )
-            success = success and np.isclose(ground_truth, measured_value, rtol=rtol)
+
+            min_acceptable = ground_truth * (1 - rtol)
+            success = success and measured_value >= min_acceptable
 
     assert success

.buildkite/performance-benchmarks/README.md

@@ -83,7 +83,6 @@ We test the throughput by using `vllm bench serve` with request rate = inf to co
         "server_parameters": {
             "model": "meta-llama/Meta-Llama-3-8B",
             "tensor_parallel_size": 1,
-            "swap_space": 16,
             "disable_log_stats": "",
             "load_format": "dummy"
         },

.buildkite/performance-benchmarks/scripts/compare-json-results.py

@@ -7,12 +7,12 @@ import argparse
 import html as _html
 import json
 import os
+from contextlib import nullcontext
 from dataclasses import dataclass
 from importlib import util
 from pathlib import Path
 
 import pandas as pd
-import regex as re
 
 pd.options.display.float_format = "{:.2f}".format
 plotly_found = util.find_spec("plotly.express") is not None
@@ -33,6 +33,45 @@ pd.set_option("display.precision", 2)
 pd.set_option("display.float_format", lambda x: f"{x:.2f}")
 
 
+# -----------------------------
+# Concurrency normalization (NEW, small)
+# -----------------------------
+def _find_concurrency_col(df: pd.DataFrame) -> str:
+    for c in [
+        "# of max concurrency.",
+        "# of max concurrency",
+        "Max Concurrency",
+        "max_concurrency",
+        "Concurrency",
+    ]:
+        if c in df.columns:
+            return c
+
+    for c in df.columns:
+        if "concurr" in str(c).lower():
+            s = df[c]
+            if s.dtype.kind in "iu" and s.nunique() > 1 and s.min() >= 1:
+                return c
+
+    raise ValueError(
+        "Cannot infer concurrency column. "
+        "Please rename the column to one of the known names "
+        "or add an explicit override (e.g., --concurrency-col)."
+    )
+
+
+def _normalize_concurrency_in_df(
+    df: pd.DataFrame, canonical: str = "# of max concurrency."
+) -> pd.DataFrame:
+    if canonical in df.columns:
+        return df
+    detected = _find_concurrency_col(df)
+    if detected in df.columns and detected != canonical:
+        return df.rename(columns={detected: canonical})
+    df[canonical] = pd.NA
+    return df
+
+
 # -----------------------------
 # Core data compare
 # -----------------------------
@@ -52,19 +91,25 @@ def compare_data_columns(
     - Concat along axis=1 (indexes align), then reset_index so callers can
       group by columns.
     - If --debug, add a <file_label>_name column per file.
+
+    Minimal fix to support different max_concurrency lists across files:
+      - normalize concurrency column naming to "# of max concurrency."
+      - align on UNION of keys (missing points become NaN)
+      - BUGFIX: don't drop throughput rows based on P99/Median presence
     """
     print("\ncompare_data_column:", data_column)
 
     frames = []
     raw_data_cols: list[str] = []
-    compare_frames = []
 
+    # Determine key cols after normalizing concurrency
     cols_per_file: list[set] = []
     for f in files:
         try:
             df_tmp = pd.read_json(f, orient="records")
         except Exception as err:
             raise ValueError(f"Failed to read {f}") from err
+        df_tmp = _normalize_concurrency_in_df(df_tmp, canonical="# of max concurrency.")
         cols_per_file.append(set(df_tmp.columns))
 
     key_cols = [c for c in info_cols if all(c in cset for cset in cols_per_file)]
@@ -75,12 +120,25 @@ def compare_data_columns(
             "No common key columns found from info_cols across the input files."
         )
 
-    meta_added = False
+    union_index = None
+    metas: list[pd.DataFrame] = []
+    staged: list[tuple[str, pd.Series, pd.Series | None]] = []
 
     for file in files:
         df = pd.read_json(file, orient="records")
+        df = _normalize_concurrency_in_df(df, canonical="# of max concurrency.")
 
-        if drop_column in df.columns:
+        # BUGFIX: only drop rows for latency-like metrics; throughput rows may have
+        # NaN in P99/Median columns even if the column exists in the JSON.
+        metric_lc = str(data_column).lower()
+        is_latency_metric = (
+            "ttft" in metric_lc
+            or "tpot" in metric_lc
+            or "p99" in metric_lc
+            or "median" in metric_lc
+            or metric_lc.strip() in {"p99", "median"}
+        )
+        if is_latency_metric and drop_column in df.columns:
             df = df.dropna(subset=[drop_column], ignore_index=True)
 
         for c in (
@@ -105,35 +163,61 @@ def compare_data_columns(
             meta = meta.groupby(level=key_cols, dropna=False).first()
 
         file_label = "/".join(file.split("/")[:-1]) or os.path.basename(file)
-        s = df_idx[data_column]
-        if not s.index.is_unique:
-            s = s.groupby(level=key_cols, dropna=False).mean()
+
+        if data_column in df_idx.columns:
+            s = df_idx[data_column]
+            if not s.index.is_unique:
+                s = s.groupby(level=key_cols, dropna=False).mean()
+        else:
+            # keep NA series to preserve meta keys for union_index
+            s = pd.Series(pd.NA, index=meta.index)
         s.name = file_label
 
-        if not meta_added:
-            frames.append(meta)
-            meta_added = True
-
+        name_s = None
         if debug and name_column in df_idx.columns:
             name_s = df_idx[name_column]
             if not name_s.index.is_unique:
                 name_s = name_s.groupby(level=key_cols, dropna=False).first()
             name_s.name = f"{file_label}_name"
-            frames.append(name_s)
 
-        frames.append(s)
+        if union_index is None:
+            union_index = meta.index
+        else:
+            union_index = union_index.union(meta.index)
+        metas.append(meta)
+
+        staged.append((file_label, s, name_s))
+
+    if union_index is None:
+        raise ValueError("No data found after loading inputs.")
+
+    # meta first (union-aligned): build UNION meta across all files
+    if metas:
+        meta_union = pd.concat(metas, axis=0)
+        # Collapse duplicates on the MultiIndex; keep first non-null per column
+        meta_union = meta_union.groupby(level=key_cols, dropna=False).first()
+        frames.append(meta_union.reindex(union_index))
+
+    # values + ratios (union-aligned)
+    metric_series_aligned: list[pd.Series] = []
+    for file_label, s, name_s in staged:
+        s_aligned = s.reindex(union_index)
+        frames.append(s_aligned)
         raw_data_cols.append(file_label)
-        compare_frames.append(s)
+        metric_series_aligned.append(s_aligned)
 
-        if len(compare_frames) >= 2:
-            base = compare_frames[0]
-            current = compare_frames[-1]
-            if "P99" in data_column or "Median" in data_column:
+        if debug and name_s is not None:
+            frames.append(name_s.reindex(union_index))
+
+        if len(metric_series_aligned) >= 2:
+            base = metric_series_aligned[0]
+            current = metric_series_aligned[-1]
+            if "P99" in str(data_column) or "Median" in str(data_column):
                 ratio = base / current
             else:
                 ratio = current / base
             ratio = ratio.mask(base == 0)
-            ratio.name = f"Ratio 1 vs {len(compare_frames)}"
+            ratio.name = f"Ratio 1 vs {len(metric_series_aligned)}"
             frames.append(ratio)
 
     concat_df = pd.concat(frames, axis=1).reset_index(drop=True)
@@ -204,24 +288,10 @@ def split_json_by_tp_pp(
 # -----------------------------
 # Styling helpers
 # -----------------------------
-def _find_concurrency_col(df: pd.DataFrame) -> str:
-    for c in [
-        "# of max concurrency.",
-        "# of max concurrency",
-        "Max Concurrency",
-        "max_concurrency",
-        "Concurrency",
-    ]:
-        if c in df.columns:
-            return c
-    for c in df.columns:
-        if df[c].dtype.kind in "iu" and df[c].nunique() > 1 and df[c].min() >= 1:
-            return c
-    return "# of max concurrency."
-
-
 def _highlight_threshold(
-    df: pd.DataFrame, threshold: float
+    df: pd.DataFrame,
+    threshold: float,
+    slack_pct: float = 0.0,
 ) -> pd.io.formats.style.Styler:
     conc_col = _find_concurrency_col(df)
     key_cols = [
@@ -234,12 +304,24 @@ def _highlight_threshold(
     ]
     conf_cols = [c for c in conf_cols if pd.api.types.is_numeric_dtype(df[c])]
 
-    return df.style.map(
-        lambda v: "background-color:#e6ffe6;font-weight:bold;"
-        if pd.notna(v) and v <= threshold
-        else "",
-        subset=conf_cols,
-    )
+    try:
+        slack_pct = float(slack_pct or 0.0)
+    except Exception:
+        slack_pct = 0.0
+    slack_limit = threshold * (1.0 + slack_pct / 100.0)
+
+    def _cell(v):
+        if pd.isna(v):
+            return ""
+        if v <= threshold:
+            # Strict SLA
+            return "background-color:#e6ffe6;font-weight:bold;"
+        if v <= slack_limit:
+            # Within slack range
+            return "background-color:#ffe5cc;font-weight:bold;"
+        return ""
+
+    return df.style.map(_cell, subset=conf_cols)
 
 
 def highlight_ratio_columns(styler: pd.io.formats.style.Styler):
@@ -286,11 +368,30 @@ def _sanitize_sheet_name(name: str) -> str:
       - max 31 chars
       - cannot contain: : \ / ? * [ ]
       - cannot be empty
+
+    NOTE: Use fast, non-regex operations here to avoid the third-party `regex`
+    module's compile overhead/edge-cases on some systems.
     """
     name = "sheet" if name is None else str(name)
-    name = re.sub(r"[:\\/?*\[\]]", "_", name)
+
+    # Replace illegal characters with underscore.
+    trans = str.maketrans(
+        {
+            ":": "_",
+            "\\": "_",
+            "/": "_",
+            "?": "_",
+            "*": "_",
+            "[": "_",
+            "]": "_",
+        }
+    )
+    name = name.translate(trans)
+
+    # Strip quotes/spaces and collapse whitespace.
     name = name.strip().strip("'")
-    name = re.sub(r"\s+", " ", name)
+    name = " ".join(name.split())
+
     if not name:
         name = "sheet"
     return name[:31]
@@ -298,30 +399,57 @@ def _sanitize_sheet_name(name: str) -> str:
 
 def _group_to_sheet_base(group_cols: list[str], gkey_tuple) -> str:
     d = dict(zip(group_cols, gkey_tuple))
-    model = d.get("Model", "model")
-    model_short = str(model).split("/")[-1]
+
+    # Always keep input/output lengths (these are important).
     ilen = d.get("Input Len", "")
     olen = d.get("Output Len", "")
     lens = f"_{ilen}x{olen}" if ilen != "" and olen != "" else ""
+
+    # Shorten model name aggressively to make room for lens.
+    model = d.get("Model", "model")
+    leaf = str(model).split("/")[-1]
+
+    max_model_len = max(1, 31 - len(lens))
+    model_short = leaf[:max_model_len]
+
     return _sanitize_sheet_name(f"{model_short}{lens}")
 
 
 def _write_tables_to_excel_sheet(
     writer: pd.ExcelWriter, sheet: str, blocks: list[tuple[str, pd.DataFrame]]
 ):
-    startrow = 0
+    """Write all blocks to a sheet with a single to_excel() call.
+
+    Pandas+openpyxl can be extremely slow when called many times per sheet.
+    We flatten blocks into one table with a 'Section' column to keep structure
+    while making Excel generation fast and deterministic.
+    """
+    if not blocks:
+        pd.DataFrame().to_excel(writer, sheet_name=sheet, index=False)
+        return
+
+    combined_parts: list[pd.DataFrame] = []
     for title, df in blocks:
-        pd.DataFrame([[title]]).to_excel(
-            writer, sheet_name=sheet, index=False, header=False, startrow=startrow
-        )
-        startrow += 1
-        df.to_excel(writer, sheet_name=sheet, index=False, startrow=startrow)
-        startrow += len(df) + 3
+        df2 = df.copy()
+        # Put the section label as the first column for readability.
+        df2.insert(0, "Section", title)
+        combined_parts.append(df2)
+
+    combined = pd.concat(combined_parts, axis=0, ignore_index=True, sort=False)
+    combined.to_excel(writer, sheet_name=sheet, index=False)
 
 
 def _safe_filename(s: str) -> str:
-    s = re.sub(r"[^\w\-.]+", "_", str(s).strip())
-    return s[:180] if len(s) > 180 else s
+    # Fast path without the third-party `regex` module.
+    s = " ".join(str(s).strip().split())
+    allowed = []
+    for ch in s:
+        if ch.isalnum() or ch in "._-":
+            allowed.append(ch)
+        else:
+            allowed.append("_")
+    out = "".join(allowed)
+    return out[:180] if len(out) > 180 else out
 
 
 # -----------------------------
@@ -428,7 +556,11 @@ def _config_value_columns(df: pd.DataFrame, conc_col: str) -> list[str]:
 
 
 def _max_concurrency_ok(
-    df: pd.DataFrame, conc_col: str, cfg_col: str, threshold: float
+    df: pd.DataFrame,
+    conc_col: str,
+    cfg_col: str,
+    threshold: float,
+    slack_pct: float = 0.0,
 ):
     if df is None or conc_col not in df.columns or cfg_col not in df.columns:
         return pd.NA
@@ -441,7 +573,14 @@ def _max_concurrency_ok(
     if d.empty:
         return pd.NA
 
-    ok = d[d[cfg_col] <= threshold]
+    # Accept values up to (1 + slack_pct%) above the SLA.
+    try:
+        slack_pct = float(slack_pct or 0.0)
+    except Exception:
+        slack_pct = 0.0
+    effective_limit = float(threshold) * (1.0 + slack_pct / 100.0)
+
+    ok = d[d[cfg_col] <= effective_limit]
     if ok.empty:
         return pd.NA
 
@@ -507,15 +646,25 @@ def build_valid_max_concurrency_summary_html(
     if not cfg_cols:
         cfg_cols = sorted(set(ttft_cols) | set(tpot_cols) | set(tput_cols), key=str)
 
+    # Display SLA ranges in the table header (SLA .. SLA*(1+slack))
+    ttft_hi = args.ttft_max_ms * (1.0 + args.ttft_slack_pct / 100.0)
+    tpot_hi = args.tpot_max_ms * (1.0 + args.tpot_slack_pct / 100.0)
+    ttft_range = f"{args.ttft_max_ms:g}–{ttft_hi:g} ms (+{args.ttft_slack_pct:g}%)"
+    tpot_range = f"{args.tpot_max_ms:g}–{tpot_hi:g} ms (+{args.tpot_slack_pct:g}%)"
+
     rows = []
     for cfg in cfg_cols:
         ttft_max = (
-            _max_concurrency_ok(ttft_group_df, conc_col, cfg, args.ttft_max_ms)
+            _max_concurrency_ok(
+                ttft_group_df, conc_col, cfg, args.ttft_max_ms, args.ttft_slack_pct
+            )
             if ttft_group_df is not None
             else pd.NA
         )
         tpot_max = (
-            _max_concurrency_ok(tpot_group_df, conc_col, cfg, args.tpot_max_ms)
+            _max_concurrency_ok(
+                tpot_group_df, conc_col, cfg, args.tpot_max_ms, args.tpot_slack_pct
+            )
             if tpot_group_df is not None
             else pd.NA
         )
@@ -544,8 +693,8 @@ def build_valid_max_concurrency_summary_html(
         rows.append(
             {
                 "Configuration": cfg,
-                f"Max {conc_col} (TTFT ≤ {args.ttft_max_ms:g} ms)": ttft_max,
-                f"Max {conc_col} (TPOT ≤ {args.tpot_max_ms:g} ms)": tpot_max,
+                f"Max {conc_col} (TTFT ≤ {ttft_range})": ttft_max,
+                f"Max {conc_col} (TPOT ≤ {tpot_range})": tpot_max,
                 f"Max {conc_col} (Both)": both,
                 "Output Tput @ Both (tok/s)": tput_at_both,
                 "TTFT @ Both (ms)": ttft_at_both,
@@ -620,15 +769,24 @@ def build_valid_max_concurrency_summary_df(
     if not cfg_cols:
         cfg_cols = sorted(set(ttft_cols) | set(tpot_cols) | set(tput_cols), key=str)
 
+    ttft_hi = args.ttft_max_ms * (1.0 + args.ttft_slack_pct / 100.0)
+    tpot_hi = args.tpot_max_ms * (1.0 + args.tpot_slack_pct / 100.0)
+    ttft_range = f"{args.ttft_max_ms:g}–{ttft_hi:g} ms (+{args.ttft_slack_pct:g}%)"
+    tpot_range = f"{args.tpot_max_ms:g}–{tpot_hi:g} ms (+{args.tpot_slack_pct:g}%)"
+
     rows = []
     for cfg in cfg_cols:
         ttft_max = (
-            _max_concurrency_ok(ttft_group_df, conc_col, cfg, args.ttft_max_ms)
+            _max_concurrency_ok(
+                ttft_group_df, conc_col, cfg, args.ttft_max_ms, args.ttft_slack_pct
+            )
             if ttft_group_df is not None
             else pd.NA
         )
         tpot_max = (
-            _max_concurrency_ok(tpot_group_df, conc_col, cfg, args.tpot_max_ms)
+            _max_concurrency_ok(
+                tpot_group_df, conc_col, cfg, args.tpot_max_ms, args.tpot_slack_pct
+            )
             if tpot_group_df is not None
             else pd.NA
         )
@@ -657,8 +815,8 @@ def build_valid_max_concurrency_summary_df(
         rows.append(
             {
                 "Configuration": cfg,
-                f"Max {conc_col} (TTFT ≤ {args.ttft_max_ms:g} ms)": ttft_max,
-                f"Max {conc_col} (TPOT ≤ {args.tpot_max_ms:g} ms)": tpot_max,
+                f"Max {conc_col} (TTFT ≤ {ttft_range})": ttft_max,
+                f"Max {conc_col} (TPOT ≤ {tpot_range})": tpot_max,
                 f"Max {conc_col} (Both)": both,
                 "Output Tput @ Both (tok/s)": tput_at_both,
                 "TTFT @ Both (ms)": ttft_at_both,
@@ -751,7 +909,21 @@ def build_parser() -> argparse.ArgumentParser:
         help="Reference limit for TPOT plots (ms)",
     )
 
-    # ---- NEW: export options ----
+    # ---- SLA tolerance (slack) options ----
+    parser.add_argument(
+        "--ttft-slack-pct",
+        type=float,
+        default=5.0,
+        help="Allowed percentage above TTFT SLA (default: 5).",
+    )
+    parser.add_argument(
+        "--tpot-slack-pct",
+        type=float,
+        default=5.0,
+        help="Allowed percentage above TPOT SLA (default: 5).",
+    )
+
+    # ---- export options ----
     parser.add_argument(
         "--excel-out",
         type=str,
@@ -843,9 +1015,13 @@ def render_metric_table_html(
 
     metric_name = metric_label.lower()
     if "ttft" in metric_name:
-        styler = _highlight_threshold(display_group, args.ttft_max_ms)
+        styler = _highlight_threshold(
+            display_group, args.ttft_max_ms, args.ttft_slack_pct
+        )
     elif ("tpot" in metric_name) or ("median" in metric_name) or ("p99" in metric_name):
-        styler = _highlight_threshold(display_group, args.tpot_max_ms)
+        styler = _highlight_threshold(
+            display_group, args.tpot_max_ms, args.tpot_slack_pct
+        )
     else:
         styler = display_group.style
 
@@ -962,22 +1138,46 @@ def write_report_group_first(
         csv_dir.mkdir(parents=True, exist_ok=True)
 
     excel_path = args.excel_out or "perf_comparison.xlsx"
-    with pd.ExcelWriter(excel_path, engine="openpyxl") as xw:
+    disable_excel = os.getenv("VLLM_COMPARE_DISABLE_EXCEL", "0") == "1"
+
+    # Prefer xlsxwriter for speed; fallback to openpyxl if unavailable.
+    excel_engine = (
+        os.getenv("VLLM_COMPARE_EXCEL_ENGINE", "xlsxwriter").strip() or "xlsxwriter"
+    )
+    if excel_engine == "xlsxwriter" and util.find_spec("xlsxwriter") is None:
+        excel_engine = "openpyxl"
+
+    excel_engine_kwargs = {}
+    if excel_engine == "xlsxwriter":
+        # Reduce memory pressure & usually faster writes.
+        excel_engine_kwargs = {"options": {"constant_memory": True}}
+
+    xw_ctx = (
+        nullcontext(None)
+        if disable_excel
+        else pd.ExcelWriter(
+            excel_path, engine=excel_engine, engine_kwargs=excel_engine_kwargs
+        )
+    )
+    with xw_ctx as xw:
+        used_sheets: set[str] = set()
         # ---- Environment sheet (first) ----
         env_sheet = _sanitize_sheet_name("Environment")
         env_df = _load_env_df_for_inputs(args, files)
-        if env_df is None or env_df.empty:
-            pd.DataFrame(
-                [
-                    {
-                        "Section": "Environment",
-                        "Key": "vllm_env.txt",
-                        "Value": "NOT FOUND (or empty)",
-                    }
-                ]
-            ).to_excel(xw, sheet_name=env_sheet, index=False)
-        else:
-            env_df.to_excel(xw, sheet_name=env_sheet, index=False)
+        if xw is not None:
+            if env_df is None or env_df.empty:
+                pd.DataFrame(
+                    [
+                        {
+                            "Section": "Environment",
+                            "Key": "vllm_env.txt",
+                            "Value": "NOT FOUND (or empty)",
+                        }
+                    ]
+                ).to_excel(xw, sheet_name=env_sheet, index=False)
+            else:
+                env_df.to_excel(xw, sheet_name=env_sheet, index=False)
+            used_sheets.add(env_sheet)
         with open("perf_comparison.html", "w", encoding="utf-8") as main_fh:
             main_fh.write('<meta charset="utf-8">\n')
             for gkey in group_keys:
@@ -993,12 +1193,19 @@ def write_report_group_first(
 
                 main_fh.write(group_header)
 
+                do_excel = xw is not None
                 sheet = _group_to_sheet_base(group_cols_canonical, gkey_tuple)
                 sheet_base = sheet
-                dedup_i = 1
-                while sheet in xw.sheets:
-                    dedup_i += 1
-                    sheet = _sanitize_sheet_name(f"{sheet_base}_{dedup_i}")
+                if do_excel:
+                    dedup_i = 1
+                    while sheet in used_sheets:
+                        dedup_i += 1
+                        suffix = f"_{dedup_i}"
+                        # Ensure uniqueness even when sheet names are truncated.
+                        base = str(sheet_base)
+                        keep = max(1, 31 - len(suffix))
+                        sheet = _sanitize_sheet_name(base[:keep] + suffix)
+                    used_sheets.add(sheet)
 
                 excel_blocks: list[tuple[str, pd.DataFrame]] = []
 
@@ -1059,7 +1266,7 @@ def write_report_group_first(
                         )
 
                         excel_blocks.append(
-                            (metric_label, display_group.reset_index(drop=True))
+                            (metric_label, group_df.reset_index(drop=True))
                         )
                         if csv_dir:
                             fn = _safe_filename(
@@ -1067,7 +1274,7 @@ def write_report_group_first(
                                     "/", "_"
                                 )
                             )
-                            display_group.to_csv(csv_dir / f"{fn}.csv", index=False)
+                            group_df.to_csv(csv_dir / f"{fn}.csv", index=False)
 
                     summary_html = build_valid_max_concurrency_summary_html(
                         tput_group_df=tput_group_df,
@@ -1097,9 +1304,13 @@ def write_report_group_first(
                             )
                             summary_df.to_csv(csv_dir / f"{fn}.csv", index=False)
 
-                _write_tables_to_excel_sheet(xw, sheet, excel_blocks)
+                if do_excel:
+                    _write_tables_to_excel_sheet(xw, sheet, excel_blocks)
 
-    print(f"Wrote Excel: {excel_path}")
+    if disable_excel:
+        print("Skipped Excel generation (VLLM_COMPARE_DISABLE_EXCEL=1).")
+    else:
+        print(f"Wrote Excel: {excel_path}")
     if csv_dir:
         print(f"Wrote CSVs under: {csv_dir}")
 

.buildkite/performance-benchmarks/scripts/run-performance-benchmarks.sh

@@ -12,6 +12,13 @@ DRY_RUN="${DRY_RUN:-0}"
 MODEL_FILTER="${MODEL_FILTER:-}"
 DTYPE_FILTER="${DTYPE_FILTER:-}"
 
+# Adaptive search controls
+ENABLE_ADAPTIVE_CONCURRENCY="${ENABLE_ADAPTIVE_CONCURRENCY:-0}"
+SLA_TTFT_MS="${SLA_TTFT_MS:-3000}"
+SLA_TPOT_MS="${SLA_TPOT_MS:-100}"
+ADAPTIVE_MAX_PROBES="${ADAPTIVE_MAX_PROBES:-8}"
+ADAPTIVE_MAX_CONCURRENCY="${ADAPTIVE_MAX_CONCURRENCY:-1024}"
+
 check_gpus() {
   if command -v nvidia-smi; then
     # check the number of GPUs and GPU type.
@@ -183,6 +190,304 @@ upload_to_buildkite() {
   $BUILDKITE_AGENT_COMMAND artifact upload "$RESULTS_FOLDER/*"
 }
 
+# -------------------------------
+# Adaptive concurrency helpers
+# -------------------------------
+result_json_path_for_serving() {
+  local test_name=$1
+  local qps=$2
+  local max_concurrency=$3
+  echo "$RESULTS_FOLDER/${test_name}_qps_${qps}_concurrency_${max_concurrency}.json"
+}
+
+extract_metric_ms() {
+  local metric_name=$1
+  local json_file=$2
+
+  [[ -f "$json_file" ]] || return 0
+
+  if [[ "$metric_name" == "ttft" ]]; then
+    jq -r '
+      [
+        .ttft_ms.p99?,
+        .metrics.ttft_ms.p99?,
+        .ttft.p99?,
+        .metrics.ttft.p99?,
+        .p99_ttft_ms?,
+        .ttft_ms.mean?,
+        .metrics.ttft_ms.mean?,
+        .ttft.mean?,
+        .metrics.ttft.mean?,
+        .mean_ttft_ms?
+      ] | map(select(. != null)) | .[0] // empty
+    ' "$json_file"
+  else
+    jq -r '
+      [
+        .tpot_ms.p99?,
+        .metrics.tpot_ms.p99?,
+        .tpot.p99?,
+        .metrics.tpot.p99?,
+        .p99_tpot_ms?,
+        .itl_ms.p99?,
+        .metrics.itl_ms.p99?,
+        .inter_token_latency_ms.p99?,
+        .tpot_ms.mean?,
+        .metrics.tpot_ms.mean?,
+        .tpot.mean?,
+        .metrics.tpot.mean?,
+        .itl_ms.mean?,
+        .metrics.itl_ms.mean?,
+        .mean_tpot_ms?,
+        .mean_itl_ms?
+      ] | map(select(. != null)) | .[0] // empty
+    ' "$json_file"
+  fi
+}
+
+evaluate_sla_from_json() {
+  local json_file=$1
+  local ttft
+  local tpot
+  local pass
+
+  [[ -f "$json_file" ]] || return 2
+
+  ttft=$(extract_metric_ms ttft "$json_file")
+  tpot=$(extract_metric_ms tpot "$json_file")
+
+  [[ -n "$ttft" && -n "$tpot" ]] || return 2
+
+  pass=$(jq -n \
+    --argjson ttft "$ttft" \
+    --argjson tpot "$tpot" \
+    --argjson sla_ttft "$SLA_TTFT_MS" \
+    --argjson sla_tpot "$SLA_TPOT_MS" \
+    '($ttft <= $sla_ttft) and ($tpot <= $sla_tpot)')
+
+  [[ "$pass" == "true" ]]
+}
+
+write_adaptive_summary_json() {
+  local summary_file=$1
+  local test_name=$2
+  local qps=$3
+  local static_last_pass=$4
+  local static_first_fail=$5
+  local final_last_pass=$6
+  local final_first_fail=$7
+
+  jq -n \
+    --arg test_name "$test_name" \
+    --arg qps "$qps" \
+    --argjson sla_ttft "$SLA_TTFT_MS" \
+    --argjson sla_tpot "$SLA_TPOT_MS" \
+    --arg static_last_pass "${static_last_pass:-}" \
+    --arg static_first_fail "${static_first_fail:-}" \
+    --arg final_last_pass "${final_last_pass:-}" \
+    --arg final_first_fail "${final_first_fail:-}" \
+    '{
+      test_name: $test_name,
+      qps: $qps,
+      sla_ttft_ms: $sla_ttft,
+      sla_tpot_ms: $sla_tpot,
+      static_last_pass: (if $static_last_pass == "" then null else ($static_last_pass | tonumber) end),
+      static_first_fail: (if $static_first_fail == "" then null else ($static_first_fail | tonumber) end),
+      final_last_pass: (if $final_last_pass == "" then null else ($final_last_pass | tonumber) end),
+      final_first_fail: (if $final_first_fail == "" then null else ($final_first_fail | tonumber) end)
+    }' > "$summary_file"
+}
+
+run_single_serving_probe() {
+  local test_name=$1
+  local qps=$2
+  local max_concurrency=$3
+  local tp=$4
+  local compilation_config_mode=$5
+  local optimization_level=$6
+  local client_args_effective=$7
+  local client_remote_args=$8
+  local server_command=$9
+
+  local new_test_name="${test_name}_qps_${qps}_concurrency_${max_concurrency}"
+  local result_json
+  local num_prompts_arg=""
+  local client_command
+
+  result_json=$(result_json_path_for_serving "$test_name" "$qps" "$max_concurrency")
+
+  if [[ -f "$result_json" ]]; then
+    evaluate_sla_from_json "$result_json"
+    return $?
+  fi
+
+  if [[ -n "${PROMPTS_PER_CONCURRENCY}" ]]; then
+    num_prompts=$(( max_concurrency * PROMPTS_PER_CONCURRENCY ))
+    if (( num_prompts < MIN_NUM_PROMPTS )); then num_prompts=$MIN_NUM_PROMPTS; fi
+    if (( num_prompts > MAX_NUM_PROMPTS )); then num_prompts=$MAX_NUM_PROMPTS; fi
+    num_prompts_arg="--num-prompts $num_prompts"
+  fi
+
+  client_command="vllm bench serve \
+    --save-result \
+    --result-dir $RESULTS_FOLDER \
+    --result-filename ${new_test_name}.json \
+    --request-rate $qps \
+    --max-concurrency $max_concurrency \
+    $num_prompts_arg \
+    --metadata tensor_parallel_size=$tp compilation_config.mode=$compilation_config_mode optimization_level=$optimization_level adaptive_search=1 \
+    $client_args_effective $client_remote_args "
+
+  echo "Adaptive probe: $client_command"
+
+  if [[ "${DRY_RUN:-0}" != "1" ]]; then
+    bash -c "$client_command"
+  fi
+
+  jq_output=$(jq -n \
+    --arg server "$server_command" \
+    --arg client "$client_command" \
+    --arg gpu "$gpu_type" \
+    '{
+      server_command: $server,
+      client_command: $client,
+      gpu_type: $gpu,
+      adaptive_search: true
+    }')
+  echo "$jq_output" > "$RESULTS_FOLDER/${new_test_name}.commands"
+
+  evaluate_sla_from_json "$result_json"
+}
+
+adaptive_refine_from_static_results() {
+  local test_name=$1
+  local qps=$2
+  local max_concurrency_list_raw=$3
+  local tp=$4
+  local compilation_config_mode=$5
+  local optimization_level=$6
+  local client_args_effective=$7
+  local client_remote_args=$8
+  local server_command=$9
+
+  local sorted_points
+  local point
+  local rc
+  local static_last_pass=""
+  local static_first_fail=""
+  local largest_static=""
+  local step_hint=1
+  local previous_point=""
+  local low
+  local high
+  local mid
+  local probes=0
+  local summary_file="$RESULTS_FOLDER/${test_name}_qps_${qps}_sla_summary.json"
+
+  [[ "${ENABLE_ADAPTIVE_CONCURRENCY}" == "1" ]] || return 0
+  [[ "${DRY_RUN:-0}" != "1" ]] || return 0
+
+  sorted_points=$(for point in $max_concurrency_list_raw; do printf '%s\n' "$point"; done | tr -d "'" | awk '/^[0-9]+$/' | sort -n | uniq)
+  [[ -n "$sorted_points" ]] || return 0
+
+  while read -r point; do
+    [[ -z "$point" ]] && continue
+    largest_static="$point"
+    evaluate_sla_from_json "$(result_json_path_for_serving "$test_name" "$qps" "$point")"
+    rc=$?
+    if (( rc == 0 )); then
+      static_last_pass="$point"
+    elif (( rc == 1 )); then
+      if [[ -n "$static_last_pass" ]]; then
+        static_first_fail="$point"
+        break
+      fi
+    fi
+
+    if [[ -n "$previous_point" ]]; then
+      step_hint=$(( point - previous_point ))
+      if (( step_hint < 1 )); then step_hint=1; fi
+    fi
+    previous_point="$point"
+  done <<< "$sorted_points"
+
+  if [[ -z "$static_last_pass" ]]; then
+    write_adaptive_summary_json "$summary_file" "$test_name" "$qps" "" "$static_first_fail" "" "$static_first_fail"
+    return 0
+  fi
+
+  if [[ -n "$static_first_fail" ]]; then
+    low=$static_last_pass
+    high=$static_first_fail
+    while (( low + 1 < high )) && (( probes < ADAPTIVE_MAX_PROBES )); do
+      mid=$(( (low + high) / 2 ))
+      probes=$(( probes + 1 ))
+      run_single_serving_probe \
+        "$test_name" "$qps" "$mid" "$tp" \
+        "$compilation_config_mode" "$optimization_level" \
+        "$client_args_effective" "$client_remote_args" "$server_command"
+      rc=$?
+      if (( rc == 0 )); then
+        low=$mid
+      elif (( rc == 1 )); then
+        high=$mid
+      else
+        break
+      fi
+    done
+    write_adaptive_summary_json "$summary_file" "$test_name" "$qps" "$static_last_pass" "$static_first_fail" "$low" "$high"
+    return 0
+  fi
+
+  low=$largest_static
+  high=""
+  while (( probes < ADAPTIVE_MAX_PROBES )); do
+    point=$(( low + step_hint ))
+    if (( point > ADAPTIVE_MAX_CONCURRENCY )); then
+      point=$ADAPTIVE_MAX_CONCURRENCY
+    fi
+    (( point > low )) || break
+    probes=$(( probes + 1 ))
+    run_single_serving_probe \
+      "$test_name" "$qps" "$point" "$tp" \
+      "$compilation_config_mode" "$optimization_level" \
+      "$client_args_effective" "$client_remote_args" "$server_command"
+    rc=$?
+    if (( rc == 0 )); then
+      low=$point
+      (( point == ADAPTIVE_MAX_CONCURRENCY )) && break
+      step_hint=$(( step_hint * 2 ))
+      if (( step_hint < 1 )); then step_hint=1; fi
+    elif (( rc == 1 )); then
+      high=$point
+      break
+    else
+      break
+    fi
+  done
+
+  if [[ -n "$high" ]]; then
+    while (( low + 1 < high )) && (( probes < ADAPTIVE_MAX_PROBES )); do
+      mid=$(( (low + high) / 2 ))
+      probes=$(( probes + 1 ))
+      run_single_serving_probe \
+        "$test_name" "$qps" "$mid" "$tp" \
+        "$compilation_config_mode" "$optimization_level" \
+        "$client_args_effective" "$client_remote_args" "$server_command"
+      rc=$?
+      if (( rc == 0 )); then
+        low=$mid
+      elif (( rc == 1 )); then
+        high=$mid
+      else
+        break
+      fi
+    done
+  fi
+
+  write_adaptive_summary_json "$summary_file" "$test_name" "$qps" "$static_last_pass" "" "$low" "$high"
+}
+
 run_benchmark_tests() {
   # run benchmark tests using `vllm bench <test_type>` command
   # $1: test type (latency or throughput)
@@ -347,10 +652,48 @@ run_serving_tests() {
     server_envs=$(echo "$params" | jq -r '.server_environment_variables')
     client_params=$(echo "$params" | jq -r '.client_parameters')
 
-    server_args=$(json2args "$server_params")
+    # vLLM serve CLI: model must be positional (no --model). Convert server_parameters accordingly.
+    server_model=$(echo "$server_params" | jq -r '.model // empty')
+    if [[ -z "$server_model" || "$server_model" == "null" ]]; then
+      echo "Error: serving test '$test_name' is missing server_parameters.model" >&2
+      exit 1
+    fi
+    server_params_no_model=$(echo "$server_params" | jq -c 'del(.model)')
+    server_args=$(json2args "$server_params_no_model")
+
     server_envs=$(json2envs "$server_envs")
     client_args=$(json2args "$client_params")
 
+    # ------------------------------------------------------------
+    # Option 1: Dynamic num-prompts scaling based on max_concurrency
+    #
+    # If PROMPTS_PER_CONCURRENCY is set, override JSON num_prompts with:
+    #   num_prompts = max_concurrency * PROMPTS_PER_CONCURRENCY
+    #
+    # If PROMPTS_PER_CONCURRENCY is NOT set, keep JSON num_prompts behavior
+    # unchanged (i.e., whatever is in serving-tests-*.json).
+    # ------------------------------------------------------------
+    PROMPTS_PER_CONCURRENCY="${PROMPTS_PER_CONCURRENCY-}"  # no default on purpose
+    MIN_NUM_PROMPTS="${MIN_NUM_PROMPTS:-1}"
+    MAX_NUM_PROMPTS="${MAX_NUM_PROMPTS:-1000000}"
+
+    if [[ -n "${PROMPTS_PER_CONCURRENCY}" ]]; then
+      # Remove any fixed --num-prompts from JSON-derived args (avoid duplicates)
+      # Remove any fixed --num-prompts from JSON-derived args (avoid duplicates)
+      # Handles: --num-prompts 123   and   --num-prompts=123
+      client_args_no_np="$(
+        printf ' %s ' "$client_args" \
+        | sed -E \
+          -e 's/[[:space:]]--num-prompts=([^[:space:]]+)([[:space:]]|$)/ /g' \
+          -e 's/[[:space:]]--num-prompts[[:space:]]+([^[:space:]]+)([[:space:]]|$)/ /g'
+      )"
+      # normalize whitespace
+      client_args_no_np="$(echo "$client_args_no_np" | tr -s ' ' | sed -E 's/^ //; s/ $//')"
+      client_args_no_np="$(echo "$client_args_no_np" | xargs)"
+      client_args_effective="$client_args_no_np"
+    else
+      client_args_effective="$client_args"
+    fi
     # qps_list
     qps_list=$(echo "$params" | jq -r '.qps_list')
     qps_list=$(echo "$qps_list" | jq -r '.[] | @sh')
@@ -382,14 +725,13 @@ run_serving_tests() {
     fi
 
     # check if server model and client model is aligned
-    server_model=$(echo "$server_params" | jq -r '.model')
     client_model=$(echo "$client_params" | jq -r '.model')
     if [[ $server_model != "$client_model" ]]; then
       echo "Server model and client model must be the same. Skip testcase $test_name."
       continue
     fi
 
-    server_command="$server_envs vllm serve \
+    server_command="$server_envs vllm serve $server_model \
       $server_args"
 
     # run the server
@@ -436,6 +778,14 @@ run_serving_tests() {
       for max_concurrency in $max_concurrency_list; do
         new_test_name="${test_name}_qps_${qps}_concurrency_${max_concurrency}"
         echo " new test name $new_test_name"
+        # If PROMPTS_PER_CONCURRENCY is set, compute per-concurrency --num-prompts.
+        num_prompts_arg=""
+        if [[ -n "${PROMPTS_PER_CONCURRENCY}" ]]; then
+          num_prompts=$(( max_concurrency * PROMPTS_PER_CONCURRENCY ))
+          if (( num_prompts < MIN_NUM_PROMPTS )); then num_prompts=$MIN_NUM_PROMPTS; fi
+          if (( num_prompts > MAX_NUM_PROMPTS )); then num_prompts=$MAX_NUM_PROMPTS; fi
+          num_prompts_arg="--num-prompts $num_prompts"
+        fi
         # pass the tensor parallel size, the compilation mode, and the optimization
         # level to the client so that they can be used on the benchmark dashboard
         client_command="vllm bench serve \
@@ -444,8 +794,9 @@ run_serving_tests() {
           --result-filename ${new_test_name}.json \
           --request-rate $qps \
           --max-concurrency $max_concurrency \
+          $num_prompts_arg \
           --metadata tensor_parallel_size=$tp compilation_config.mode=$compilation_config_mode optimization_level=$optimization_level \
-          $client_args $client_remote_args "
+          $client_args_effective $client_remote_args "
 
         echo "Running test case $test_name with qps $qps"
         echo "Client command: $client_command"
@@ -467,6 +818,11 @@ run_serving_tests() {
         echo "$jq_output" >"$RESULTS_FOLDER/${new_test_name}.commands"
 
       done
+
+      adaptive_refine_from_static_results \
+        "$test_name" "$qps" "$max_concurrency_list" "$tp" \
+        "$compilation_config_mode" "$optimization_level" \
+        "$client_args_effective" "$client_remote_args" "$server_command"
     done
 
     # clean up
@@ -532,6 +888,7 @@ main() {
   # postprocess benchmarking results
   pip install tabulate pandas
   python3 $QUICK_BENCHMARK_ROOT/scripts/convert-results-json-to-markdown.py
+  python3 $QUICK_BENCHMARK_ROOT/scripts/compare-json-results.py -f $RESULTS_FOLDER/benchmark_results.json
 
   upload_to_buildkite
 }

.buildkite/performance-benchmarks/tests/serving-tests-cpu-asr.json

@@ -0,0 +1,37 @@
+{
+  "defaults": {
+    "qps_list": [
+      "inf"
+    ],
+    "max_concurrency_list": [12, 16, 24, 32, 64, 128, 200],
+    "server_environment_variables": {
+      "VLLM_RPC_TIMEOUT": 100000,
+      "VLLM_ENGINE_ITERATION_TIMEOUT_S": 120
+    },
+    "server_parameters": {
+      "dtype": "bfloat16",
+      "model": "openai/whisper-large-v3-turbo"
+    },
+    "client_parameters": {
+      "model": "openai/whisper-large-v3-turbo",
+      "backend": "openai-audio",
+      "endpoint": "/v1/audio/transcriptions",
+      "dataset_name": "hf",
+      "dataset_path": "openslr/librispeech_asr",
+      "hf_subset": "clean",
+      "hf_split": "test",
+      "no_stream": "",
+      "no_oversample": "",
+      "num_prompts": 200
+    }
+  },
+  "tests": [
+    {
+      "test_name": "serving_whisper_large_v3_turbo_librispeech_clean_tp1",
+      "server_parameters": {
+        "tensor_parallel_size": 1
+      },
+      "client_parameters": {}
+    }
+  ]
+}

.buildkite/performance-benchmarks/tests/serving-tests-cpu-text.json

@@ -149,6 +149,39 @@
         "random-output-len": 128
       }
     },
+    {
+      "test_name": "serving_llama8B_tp1_random_2048_2048",
+      "server_parameters": {
+        "tensor_parallel_size": 1
+      },
+      "client_parameters": {
+        "dataset_name": "random",
+        "random-input-len": 2048,
+        "random-output-len": 2048
+      }
+    },
+    {
+      "test_name": "serving_llama8B_tp2_random_2048_2048",
+      "server_parameters": {
+        "tensor_parallel_size": 2
+      },
+      "client_parameters": {
+        "dataset_name": "random",
+        "random-input-len": 2048,
+        "random-output-len": 2048
+      }
+    },
+    {
+      "test_name": "serving_llama8B_tp4_random_2048_2048",
+      "server_parameters": {
+        "tensor_parallel_size": 4
+      },
+      "client_parameters": {
+        "dataset_name": "random",
+        "random-input-len": 2048,
+        "random-output-len": 2048
+      }
+    },
     {
       "test_name": "serving_llama8B_int4_tp1_random_128_128",
       "server_parameters": {
@@ -188,6 +221,45 @@
         "random-output-len": 128
       }
     },
+    {
+      "test_name": "serving_llama8B_int8_tp1_random_128_128",
+      "server_parameters": {
+        "model": "RedHatAI/Meta-Llama-3.1-8B-Instruct-quantized.w8a8",
+        "tensor_parallel_size": 1
+      },
+      "client_parameters": {
+        "model": "RedHatAI/Meta-Llama-3.1-8B-Instruct-quantized.w8a8",
+        "dataset_name": "random",
+        "random-input-len": 128,
+        "random-output-len": 128
+      }
+    },
+    {
+      "test_name": "serving_llama8B_int8_tp2_random_128_128",
+      "server_parameters": {
+        "model": "RedHatAI/Meta-Llama-3.1-8B-Instruct-quantized.w8a8",
+        "tensor_parallel_size": 2
+      },
+      "client_parameters": {
+        "model": "RedHatAI/Meta-Llama-3.1-8B-Instruct-quantized.w8a8",
+        "dataset_name": "random",
+        "random-input-len": 128,
+        "random-output-len": 128
+      }
+    },
+    {
+      "test_name": "serving_llama8B_int8_tp4_random_128_128",
+      "server_parameters": {
+        "model": "RedHatAI/Meta-Llama-3.1-8B-Instruct-quantized.w8a8",
+        "tensor_parallel_size": 4
+      },
+      "client_parameters": {
+        "model": "RedHatAI/Meta-Llama-3.1-8B-Instruct-quantized.w8a8",
+        "dataset_name": "random",
+        "random-input-len": 128,
+        "random-output-len": 128
+      }
+    },
     {
       "test_name": "serving_llama3B_tp1_random_128_128",
       "server_parameters": {

.buildkite/performance-benchmarks/tests/serving-tests-cpu.json

@@ -72,17 +72,6 @@
         "random-output-len": 128
       }
     },
-    {
-      "test_name": "serving_llama8B_tp4_random_128_128",
-      "server_parameters": {
-        "tensor_parallel_size": 4
-      },
-      "client_parameters": {
-        "dataset_name": "random",
-        "random-input-len": 128,
-        "random-output-len": 128
-      }
-    },
     {
       "test_name": "serving_llama8B_tp1_random_128_2048",
       "server_parameters": {
@@ -105,17 +94,6 @@
         "random-output-len": 2048
       }
     },
-    {
-      "test_name": "serving_llama8B_tp4_random_128_2048",
-      "server_parameters": {
-        "tensor_parallel_size": 4
-      },
-      "client_parameters": {
-        "dataset_name": "random",
-        "random-input-len": 128,
-        "random-output-len": 2048
-      }
-    },
     {
       "test_name": "serving_llama8B_tp1_random_2048_128",
       "server_parameters": {
@@ -139,14 +117,25 @@
       }
     },
     {
-      "test_name": "serving_llama8B_tp4_random_2048_128",
+      "test_name": "serving_llama8B_tp1_random_2048_2048",
       "server_parameters": {
-        "tensor_parallel_size": 4
+        "tensor_parallel_size": 1
       },
       "client_parameters": {
         "dataset_name": "random",
         "random-input-len": 2048,
-        "random-output-len": 128
+        "random-output-len": 2048
+      }
+    },
+    {
+      "test_name": "serving_llama8B_tp2_random_2048_2048",
+      "server_parameters": {
+        "tensor_parallel_size": 2
+      },
+      "client_parameters": {
+        "dataset_name": "random",
+        "random-input-len": 2048,
+        "random-output-len": 2048
       }
     }
   ]

.buildkite/performance-benchmarks/tests/serving-tests-hpu.json

@@ -10,7 +10,6 @@
         "server_parameters": {
             "model": "meta-llama/Meta-Llama-3.1-8B-Instruct",
             "tensor_parallel_size": 1,
-            "swap_space": 16,
             "disable_log_stats": "",
             "load_format": "dummy",
             "max-model-len": 2048,
@@ -37,7 +36,6 @@
         "server_parameters": {
             "model": "meta-llama/Meta-Llama-3.1-70B-Instruct",
             "tensor_parallel_size": 4,
-            "swap_space": 16,
             "disable_log_stats": "",
             "load_format": "dummy",
             "max-model-len": 2048,
@@ -64,7 +62,6 @@
         "server_parameters": {
             "model": "mistralai/Mixtral-8x7B-Instruct-v0.1",
             "tensor_parallel_size": 2,
-            "swap_space": 16,
             "disable_log_stats": "",
             "load_format": "dummy",
             "max-model-len": 2048,
@@ -91,7 +88,6 @@
         "server_parameters": {
             "model": "deepseek-ai/DeepSeek-R1",
             "tensor_parallel_size": 8,
-            "swap_space": 16,
             "disable_log_stats": "",
             "load_format": "dummy",
             "max-model-len": 2048,

.buildkite/performance-benchmarks/tests/serving-tests.json

@@ -5,7 +5,6 @@
         "server_parameters": {
             "model": "meta-llama/Meta-Llama-3.1-8B-Instruct",
             "tensor_parallel_size": 1,
-            "swap_space": 16,
             "disable_log_stats": "",
             "load_format": "dummy"
         },
@@ -23,7 +22,6 @@
         "server_parameters": {
             "model": "meta-llama/Meta-Llama-3.1-70B-Instruct",
             "tensor_parallel_size": 4,
-            "swap_space": 16,
             "disable_log_stats": "",
             "load_format": "dummy"
         },
@@ -41,7 +39,6 @@
         "server_parameters": {
             "model": "mistralai/Mixtral-8x7B-Instruct-v0.1",
             "tensor_parallel_size": 2,
-            "swap_space": 16,
             "disable_log_stats": "",
             "load_format": "dummy"
         },
@@ -59,7 +56,6 @@
         "server_parameters": {
             "model": "meta-llama/Meta-Llama-3.1-70B-Instruct", 
             "tensor_parallel_size": 4,
-            "swap_space": 16,
             "speculative_config": {
                 "model": "turboderp/Qwama-0.5B-Instruct",
                 "num_speculative_tokens": 4,

.buildkite/release-pipeline.yaml

@@ -83,7 +83,7 @@ steps:
         agents:
           queue: cpu_queue_postmerge
         commands:
-          - "DOCKER_BUILDKIT=1 docker build --build-arg max_jobs=16 --build-arg GIT_REPO_CHECK=1 --build-arg VLLM_CPU_AVX512BF16=true --build-arg VLLM_CPU_AVX512VNNI=true --build-arg VLLM_CPU_AMXBF16=true --tag vllm-ci:build-image --target vllm-build --progress plain -f docker/Dockerfile.cpu ."
+          - "DOCKER_BUILDKIT=1 docker build --build-arg max_jobs=16 --build-arg GIT_REPO_CHECK=1 --build-arg VLLM_CPU_X86=true --tag vllm-ci:build-image --target vllm-build --progress plain -f docker/Dockerfile.cpu ."
           - "mkdir artifacts"
           - "docker run --rm -v $(pwd)/artifacts:/artifacts_host vllm-ci:build-image bash -c 'cp -r dist /artifacts_host && chmod -R a+rw /artifacts_host'"
           - "bash .buildkite/scripts/upload-nightly-wheels.sh manylinux_2_35"
@@ -152,7 +152,7 @@ steps:
           queue: cpu_queue_postmerge
         commands:
           - "aws ecr-public get-login-password --region us-east-1 | docker login --username AWS --password-stdin public.ecr.aws/q9t5s3a7"
-          - "DOCKER_BUILDKIT=1 docker build --build-arg max_jobs=16 --build-arg GIT_REPO_CHECK=1 --build-arg VLLM_CPU_AVX512BF16=true --build-arg VLLM_CPU_AVX512VNNI=true --build-arg VLLM_CPU_AMXBF16=true --tag public.ecr.aws/q9t5s3a7/vllm-cpu-release-repo:$(buildkite-agent meta-data get release-version) --tag public.ecr.aws/q9t5s3a7/vllm-cpu-release-repo:latest --progress plain --target vllm-openai -f docker/Dockerfile.cpu ."
+          - "DOCKER_BUILDKIT=1 docker build --build-arg max_jobs=16 --build-arg GIT_REPO_CHECK=1 --build-arg VLLM_CPU_X86=true --tag public.ecr.aws/q9t5s3a7/vllm-cpu-release-repo:$(buildkite-agent meta-data get release-version) --tag public.ecr.aws/q9t5s3a7/vllm-cpu-release-repo:latest --progress plain --target vllm-openai -f docker/Dockerfile.cpu ."
           - "docker push public.ecr.aws/q9t5s3a7/vllm-cpu-release-repo:latest"
           - "docker push public.ecr.aws/q9t5s3a7/vllm-cpu-release-repo:$(buildkite-agent meta-data get release-version)"
         env:

.buildkite/scripts/hardware_ci/run-amd-test.sh

@@ -205,6 +205,13 @@ re_quote_pytest_markers() {
       esac
 
       if $is_boundary; then
+        # Strip surrounding double quotes if present (from upstream
+        # single-to-double conversion); without this, wrapping below
+        # would produce '"expr"' with literal double-quote characters.
+        if [[ "$marker_buf" == '"'*'"' ]]; then
+          marker_buf="${marker_buf#\"}"
+          marker_buf="${marker_buf%\"}"
+        fi
         # Flush the collected marker expression
         if [[ "$marker_buf" == *" "* || "$marker_buf" == *"("* ]]; then
           output+="'${marker_buf}' "
@@ -242,6 +249,11 @@ re_quote_pytest_markers() {
 
   # Flush any trailing marker expression (marker at end of command)
   if $collecting && [[ -n "$marker_buf" ]]; then
+    # Strip surrounding double quotes (see mid-stream flush comment)
+    if [[ "$marker_buf" == '"'*'"' ]]; then
+      marker_buf="${marker_buf#\"}"
+      marker_buf="${marker_buf%\"}"
+    fi
     if [[ "$marker_buf" == *" "* || "$marker_buf" == *"("* ]]; then
       output+="'${marker_buf}'"
     else
@@ -492,6 +504,8 @@ else
     -e HF_TOKEN \
     -e AWS_ACCESS_KEY_ID \
     -e AWS_SECRET_ACCESS_KEY \
+    -e BUILDKITE_PARALLEL_JOB \
+    -e BUILDKITE_PARALLEL_JOB_COUNT \
     -v "${HF_CACHE}:${HF_MOUNT}" \
     -e "HF_HOME=${HF_MOUNT}" \
     -e "PYTHONPATH=${MYPYTHONPATH}" \

.buildkite/scripts/hardware_ci/run-cpu-compatibility-test.sh

@@ -0,0 +1,65 @@
+#!/bin/bash
+set -euox pipefail
+
+export VLLM_CPU_KVCACHE_SPACE=1 
+export VLLM_CPU_CI_ENV=1
+# Reduce sub-processes for acceleration
+export TORCH_COMPILE_DISABLE=1 
+export VLLM_ENABLE_V1_MULTIPROCESSING=0
+
+SDE_ARCHIVE="sde-external-10.7.0-2026-02-18-lin.tar.xz"
+SDE_CHECKSUM="CA3D4086DE4ACB3FAEDF9F57B541C6936B7D5E19AE2BF763B6EA933573A0A217"
+wget "https://downloadmirror.intel.com/913594/${SDE_ARCHIVE}"
+echo "${SDE_CHECKSUM}  ${SDE_ARCHIVE}" | sha256sum --check
+mkdir -p sde
+tar -xvf "./${SDE_ARCHIVE}" --strip-components=1 -C ./sde/
+
+wait_for_pid_and_check_log() {
+    local pid="$1"
+    local log_file="$2"
+    local exit_status
+
+    if [ -z "$pid" ] || [ -z "$log_file" ]; then
+        echo "Usage: wait_for_pid_and_check_log <PID> <LOG_FILE>"
+        return 1
+    fi
+
+    echo "Waiting for process $pid to finish..."
+    
+    # Use the 'wait' command to pause the script until the specific PID exits.
+    # The 'wait' command's own exit status will be that of the waited-for process.
+    if wait "$pid"; then
+        exit_status=$?
+        echo "Process $pid finished with exit status $exit_status (Success)."
+    else
+        exit_status=$?
+        echo "Process $pid finished with exit status $exit_status (Failure)."
+    fi
+
+    if [ "$exit_status" -ne 0 ]; then
+        echo "Process exited with a non-zero status."
+        echo "--- Last few lines of log file: $log_file ---"
+        tail -n 50 "$log_file"
+        echo "---------------------------------------------"
+        return 1 # Indicate failure based on exit status
+    fi
+
+    echo "No errors detected in log file and process exited successfully."
+    return 0
+}
+
+# Test Sky Lake (AVX512F)
+./sde/sde64 -skl -- python3 examples/basic/offline_inference/generate.py --model facebook/opt-125m --dtype bfloat16 > test_0.log 2>&1 &
+PID_TEST_0=$!
+
+# Test Cascade Lake (AVX512F + VNNI)
+./sde/sde64 -clx -- python3 examples/basic/offline_inference/generate.py --model facebook/opt-125m --dtype bfloat16 > test_1.log 2>&1 &
+PID_TEST_1=$!
+
+# Test Cooper Lake (AVX512F + VNNI + BF16)
+./sde/sde64 -cpx -- python3 examples/basic/offline_inference/generate.py --model facebook/opt-125m --dtype bfloat16 > test_2.log 2>&1 &
+PID_TEST_2=$!
+
+wait_for_pid_and_check_log $PID_TEST_0 test_0.log
+wait_for_pid_and_check_log $PID_TEST_1 test_1.log
+wait_for_pid_and_check_log $PID_TEST_2 test_2.log

.buildkite/scripts/hardware_ci/run-cpu-test-arm.sh

@@ -34,7 +34,7 @@ function cpu_tests() {
   # offline inference
   docker exec cpu-test bash -c "
     set -e
-    python3 examples/offline_inference/basic/generate.py --model facebook/opt-125m"
+    python3 examples/basic/offline_inference/generate.py --model facebook/opt-125m"
 
   # Run model tests
   docker exec cpu-test bash -c "

.buildkite/scripts/hardware_ci/run-cpu-test-ppc64le.sh

@@ -27,7 +27,7 @@ function cpu_tests() {
   podman exec -it "$container_id" bash -c "
     export TORCH_COMPILE_DISABLE=1
     set -xve
-    python3 examples/offline_inference/basic/generate.py --model facebook/opt-125m" >> "$HOME"/test_basic.log
+    python3 examples/basic/offline_inference/generate.py --model facebook/opt-125m" >> "$HOME"/test_basic.log
 
   # Run basic model test
   podman exec -it "$container_id" bash -c "

.buildkite/scripts/hardware_ci/run-gh200-test.sh

@@ -25,5 +25,5 @@ remove_docker_container
 
 # Run the image and test offline inference
 docker run -e HF_TOKEN -e VLLM_WORKER_MULTIPROC_METHOD=spawn -v /root/.cache/huggingface:/root/.cache/huggingface --name gh200-test --gpus=all --entrypoint="" gh200-test bash -c '
-    python3 examples/offline_inference/basic/generate.py --model meta-llama/Llama-3.2-1B
+    python3 examples/basic/offline_inference/generate.py --model meta-llama/Llama-3.2-1B
 '

.buildkite/scripts/hardware_ci/run-hpu-test.sh

@@ -76,7 +76,7 @@ docker run --rm --runtime=habana --name="${container_name}" --network=host \
   -e PT_HPU_LAZY_MODE=1 \
   "${image_name}" \
   /bin/bash -c '
-  cd vllm; timeout 120s python -u examples/offline_inference/basic/generate.py --model facebook/opt-125m
+  cd vllm; timeout 120s python -u examples/basic/offline_inference/generate.py --model facebook/opt-125m
 '
 
 EXITCODE=$?

.buildkite/scripts/hardware_ci/run-xpu-test.sh

@@ -34,15 +34,15 @@ docker run \
     set -e
     echo $ZE_AFFINITY_MASK
     pip install tblib==3.1.0
-    python3 examples/offline_inference/basic/generate.py --model facebook/opt-125m --block-size 64 --enforce-eager
-    python3 examples/offline_inference/basic/generate.py --model facebook/opt-125m --block-size 64 -O3 -cc.cudagraph_mode=NONE
-    python3 examples/offline_inference/basic/generate.py --model facebook/opt-125m --block-size 64 --enforce-eager -tp 2 --distributed-executor-backend ray
-    python3 examples/offline_inference/basic/generate.py --model facebook/opt-125m --block-size 64 --enforce-eager -tp 2 --distributed-executor-backend mp
-    python3 examples/offline_inference/basic/generate.py --model facebook/opt-125m --block-size 64 --enforce-eager --attention-backend=TRITON_ATTN
-    python3 examples/offline_inference/basic/generate.py --model facebook/opt-125m --block-size 64 --enforce-eager --quantization fp8
-    python3 examples/offline_inference/basic/generate.py --model superjob/Qwen3-4B-Instruct-2507-GPTQ-Int4  --block-size 64 --enforce-eager
-    python3 examples/offline_inference/basic/generate.py --model ibm-research/PowerMoE-3b  --block-size 64 --enforce-eager -tp 2
-    python3 examples/offline_inference/basic/generate.py --model ibm-research/PowerMoE-3b  --block-size 64 --enforce-eager -tp 2 --enable-expert-parallel
+    python3 examples/basic/offline_inference/generate.py --model facebook/opt-125m --block-size 64 --enforce-eager
+    python3 examples/basic/offline_inference/generate.py --model facebook/opt-125m --block-size 64 -O3 -cc.cudagraph_mode=NONE
+    python3 examples/basic/offline_inference/generate.py --model facebook/opt-125m --block-size 64 --enforce-eager -tp 2 --distributed-executor-backend ray
+    python3 examples/basic/offline_inference/generate.py --model facebook/opt-125m --block-size 64 --enforce-eager -tp 2 --distributed-executor-backend mp
+    python3 examples/basic/offline_inference/generate.py --model facebook/opt-125m --block-size 64 --enforce-eager --attention-backend=TRITON_ATTN
+    python3 examples/basic/offline_inference/generate.py --model facebook/opt-125m --block-size 64 --enforce-eager --quantization fp8
+    python3 examples/basic/offline_inference/generate.py --model superjob/Qwen3-4B-Instruct-2507-GPTQ-Int4  --block-size 64 --enforce-eager
+    python3 examples/basic/offline_inference/generate.py --model ibm-research/PowerMoE-3b  --block-size 64 --enforce-eager -tp 2
+    python3 examples/basic/offline_inference/generate.py --model ibm-research/PowerMoE-3b  --block-size 64 --enforce-eager -tp 2 --enable-expert-parallel
     cd tests
     pytest -v -s v1/core --ignore=v1/core/test_reset_prefix_cache_e2e.py --ignore=v1/core/test_scheduler_e2e.py
     pytest -v -s v1/engine

.buildkite/scripts/scheduled_integration_test/qwen3_next_mtp_async_eplb.sh

@@ -24,7 +24,7 @@ if command -v rocm-smi &> /dev/null || [[ -d /opt/rocm ]] || [[ -n "${ROCM_PATH:
   BACKENDS=("allgather_reducescatter")
   # Disable MOE padding for ROCm since it is causing eplb to fail
   export VLLM_ROCM_MOE_PADDING=0
-  PLATFORM_ARGS=("--no-async-scheduling")
+  PLATFORM_ARGS=("--no-async-scheduling" "--attention-backend=TRITON_ATTN")
   echo "Disabled async scheduling for ROCm platform due to issues with spec decode."
 else
   # Non-ROCm platform (CUDA/other)

.buildkite/scripts/tool_call/run-bfcl-eval.sh

@@ -0,0 +1,248 @@
+#!/bin/bash
+# Run BFCL (Berkeley Function Call Leaderboard) tool-calling correctness
+# evaluation against a local vLLM server.
+#
+# Usage:
+#   # Run with defaults (gpt-oss-20b, multi_turn)
+#   bash .buildkite/scripts/tool_call/run-bfcl-eval.sh
+#
+#   # Run with gpt-oss-120b and multiple test categories
+#   BFCL_MODEL="openai/gpt-oss-120b" BFCL_TP_SIZE=4 \
+#     BFCL_TEST_CATEGORY="live_simple, multiple, parallel_multiple" \
+#     bash .buildkite/scripts/tool_call/run-bfcl-eval.sh
+#
+#   # Chain both API types (use BFCL_OUTPUT_DIR to avoid overwriting results)
+#   BFCL_OUTPUT_DIR=./bfcl-chat-completions BFCL_API_TYPE=chat_completions \
+#     bash .buildkite/scripts/tool_call/run-bfcl-eval.sh && \
+#   BFCL_OUTPUT_DIR=./bfcl-responses BFCL_API_TYPE=responses \
+#     bash .buildkite/scripts/tool_call/run-bfcl-eval.sh
+#
+# Environment variables (all optional, with defaults):
+#   BFCL_MODEL          - HF model name (default: openai/gpt-oss-20b)
+#   BFCL_API_TYPE       - API type: "chat_completions" or "responses" (default: chat_completions)
+#   BFCL_OUTPUT_DIR     - Directory for BFCL results (default: current working directory)
+#   BFCL_TEST_CATEGORY  - BFCL test categories (default: multi_turn)
+#   BFCL_TOOL_CALL_PARSER - Tool call parser name (default: openai)
+#   BFCL_NUM_THREADS    - Threads for BFCL generate (default: 8)
+#   BFCL_TP_SIZE        - Tensor parallel size (default: 1)
+#   BFCL_MAX_MODEL_LEN  - Max model length (default: 4096)
+#   BFCL_PORT           - Server port (default: 8000)
+#   BFCL_REASONING_PARSER - Reasoning parser name (default: disabled)
+#   BFCL_EXTRA_ARGS     - Additional vLLM server args
+
+set -euo pipefail
+
+# ---- Configuration ----
+MODEL="${BFCL_MODEL:-openai/gpt-oss-20b}"
+API_TYPE="${BFCL_API_TYPE:-chat_completions}"
+OUTPUT_DIR="${BFCL_OUTPUT_DIR:-}"
+TEST_CATEGORY="${BFCL_TEST_CATEGORY:-multi_turn}"
+TOOL_CALL_PARSER="${BFCL_TOOL_CALL_PARSER:-openai}"
+NUM_THREADS="${BFCL_NUM_THREADS:-8}"
+TP_SIZE="${BFCL_TP_SIZE:-1}"
+MAX_MODEL_LEN="${BFCL_MAX_MODEL_LEN:-4096}"
+PORT="${BFCL_PORT:-8000}"
+REASONING_PARSER="${BFCL_REASONING_PARSER:-}"
+EXTRA_ARGS="${BFCL_EXTRA_ARGS:-}"
+
+# Set up output directory
+if [ -n "$OUTPUT_DIR" ]; then
+    mkdir -p "$OUTPUT_DIR"
+    OUTPUT_DIR="$(cd "$OUTPUT_DIR" && pwd)"
+fi
+
+echo "============================================"
+echo "BFCL Tool Call Correctness Evaluation"
+echo "============================================"
+echo "Model:          $MODEL"
+echo "Tool parser:    $TOOL_CALL_PARSER"
+echo "API type:       $API_TYPE"
+echo "Output dir:     ${OUTPUT_DIR:-<cwd>}"
+echo "Test category:  $TEST_CATEGORY"
+echo "TP size:        $TP_SIZE"
+echo "Max model len:  $MAX_MODEL_LEN"
+echo "Port:           $PORT"
+echo "Num threads:    $NUM_THREADS"
+echo "============================================"
+
+# ---- Install bfcl-eval if missing ----
+if ! python3 -c "import bfcl_eval" 2>/dev/null; then
+    echo "Installing bfcl-eval..."
+    pip install "bfcl-eval>=2025.10.20.1,<2026"
+fi
+
+# ---- Cleanup handler ----
+SERVER_PID=""
+cleanup() {
+    if [ -n "$SERVER_PID" ]; then
+        echo "Stopping vLLM server (pid=$SERVER_PID)..."
+        kill "$SERVER_PID" 2>/dev/null || true
+        wait "$SERVER_PID" 2>/dev/null || true
+    fi
+    # Remove BFCL lock files (created by filelock for thread-safe writes)
+    rm -rf .file_locks/
+    if [ -n "${OUTPUT_DIR:-}" ]; then
+        rm -rf "$OUTPUT_DIR/.file_locks/"
+    fi
+}
+trap cleanup EXIT
+
+# ---- Start vLLM server ----
+echo "Starting vLLM server..."
+
+SERVE_ARGS=(
+    "$MODEL"
+    --port "$PORT"
+    --enable-auto-tool-choice
+    --tool-call-parser "$TOOL_CALL_PARSER"
+    --tensor-parallel-size "$TP_SIZE"
+    --max-model-len "$MAX_MODEL_LEN"
+    --enforce-eager
+    --no-enable-prefix-caching
+)
+
+# Append reasoning parser if specified
+if [ -n "$REASONING_PARSER" ]; then
+    SERVE_ARGS+=(--reasoning-parser "$REASONING_PARSER")
+fi
+
+# Append any extra args
+if [ -n "$EXTRA_ARGS" ]; then
+    read -ra EXTRA_ARGS_ARRAY <<< "$EXTRA_ARGS"
+    SERVE_ARGS+=("${EXTRA_ARGS_ARRAY[@]}")
+fi
+
+echo "Command: vllm serve ${SERVE_ARGS[*]}"
+vllm serve "${SERVE_ARGS[@]}" &
+SERVER_PID=$!
+
+# ---- Wait for server to be ready ----
+echo "Waiting for vLLM server to start (timeout: 600s)..."
+SECONDS_WAITED=0
+until curl -sf "http://localhost:${PORT}/health" > /dev/null 2>&1; do
+    if [ $SECONDS_WAITED -ge 600 ]; then
+        echo ""
+        echo "ERROR: vLLM server failed to start within 600s"
+        exit 1
+    fi
+    if (( SECONDS_WAITED % 30 == 0 && SECONDS_WAITED > 0 )); then
+        echo "  Still waiting... (${SECONDS_WAITED}s elapsed)"
+    fi
+    sleep 2
+    SECONDS_WAITED=$((SECONDS_WAITED + 2))
+done
+echo "vLLM server is ready. (started in ${SECONDS_WAITED}s)"
+
+# ---- Run BFCL evaluation ----
+# bfcl-eval has no CLI entry point; generate() and evaluate() are Typer
+# functions that must be called from Python. The MODEL_CONFIG_MAPPING must
+# be patched in-process so BFCL knows to use the OpenAI-compatible handler
+# against our local vLLM server.
+bfcl_exit_code=0
+python3 - "$MODEL" "$TEST_CATEGORY" "$NUM_THREADS" "$PORT" "$API_TYPE" "$OUTPUT_DIR" << 'PYEOF' || bfcl_exit_code=$?
+import os
+import sys
+
+model = sys.argv[1]
+test_category = sys.argv[2]
+num_threads = int(sys.argv[3])
+port = sys.argv[4]
+api_type = sys.argv[5]
+output_dir = sys.argv[6] if len(sys.argv) > 6 and sys.argv[6] else os.getcwd()
+
+os.environ["OPENAI_BASE_URL"] = f"http://localhost:{port}/v1"
+os.environ["OPENAI_API_KEY"] = "dummy"
+os.environ["BFCL_PROJECT_ROOT"] = output_dir
+
+import bfcl_eval.constants.model_config as bfcl_model_config
+from bfcl_eval.constants.model_config import ModelConfig
+from bfcl_eval.model_handler.api_inference.openai_completion import (
+    OpenAICompletionsHandler,
+)
+from bfcl_eval.model_handler.api_inference.openai_response import (
+    OpenAIResponsesHandler,
+)
+
+if api_type == "responses":
+    handler = OpenAIResponsesHandler
+else:
+    handler = OpenAICompletionsHandler
+
+bfcl_model_config.MODEL_CONFIG_MAPPING[model] = ModelConfig(
+    model_name=model,
+    display_name=f"{model} (FC) (vLLM)",
+    url=f"https://huggingface.co/{model}",
+    org="",
+    license="apache-2.0",
+    model_handler=handler,
+    input_price=None,
+    output_price=None,
+    is_fc_model=True,
+    underscore_to_dot=True,
+)
+
+from bfcl_eval.__main__ import evaluate, generate
+import inspect
+import typer
+
+
+def _get_default_kwargs(function):
+    kwargs = {}
+    for k, v in inspect.signature(function).parameters.items():
+        if v.default is not inspect.Parameter.empty:
+            default = v.default
+            if isinstance(default, typer.models.OptionInfo):
+                default = default.default
+            kwargs[k] = default
+    return kwargs
+
+
+# ---- generate ----
+print(f"=== BFCL generate: model={model} test_category={test_category} ===")
+gen_kwargs = _get_default_kwargs(generate)
+gen_kwargs["model"] = [model]
+gen_kwargs["test_category"] = [c.strip() for c in test_category.split(",")]
+gen_kwargs["skip_server_setup"] = True
+gen_kwargs["num_threads"] = num_threads
+generate(**gen_kwargs)
+
+# ---- evaluate ----
+print(f"=== BFCL evaluate: model={model} test_category={test_category} ===")
+eval_kwargs = _get_default_kwargs(evaluate)
+eval_kwargs["model"] = [model]
+eval_kwargs["test_category"] = [c.strip() for c in test_category.split(",")]
+evaluate(**eval_kwargs)
+
+print("=== BFCL evaluation completed successfully ===")
+PYEOF
+
+# ---- Upload results to buildkite ----
+if command -v buildkite-agent &>/dev/null; then
+    if [ $bfcl_exit_code -eq 0 ]; then
+        STYLE="success"
+        STATUS="PASSED"
+    else
+        STYLE="error"
+        STATUS="FAILED"
+    fi
+
+    buildkite-agent annotate --style "$STYLE" --context "bfcl-results" <<EOF
+### BFCL Tool Call Correctness - ${STATUS}
+- **Model:** \`${MODEL}\`
+- **Parser:** \`${TOOL_CALL_PARSER}\`
+- **API type:** \`${API_TYPE}\`
+- **Test category:** \`${TEST_CATEGORY}\`
+EOF
+
+    # BFCL writes results to $BFCL_PROJECT_ROOT/result/ and scores to
+    # $BFCL_PROJECT_ROOT/score/
+    RESULTS_ROOT="${OUTPUT_DIR:-.}"
+    if [ -d "$RESULTS_ROOT/result" ]; then
+        buildkite-agent artifact upload "$RESULTS_ROOT/result/**/*"
+    fi
+    if [ -d "$RESULTS_ROOT/score" ]; then
+        buildkite-agent artifact upload "$RESULTS_ROOT/score/**/*"
+    fi
+fi
+
+exit $bfcl_exit_code

.buildkite/test_areas/basic_correctness.yaml

@@ -14,8 +14,3 @@ steps:
   - pytest -v -s basic_correctness/test_cumem.py
   - pytest -v -s basic_correctness/test_basic_correctness.py
   - pytest -v -s basic_correctness/test_cpu_offload.py
-  mirror:
-    amd:
-      device: mi325_1
-      depends_on:
-      - image-build-amd

.buildkite/test_areas/compile.yaml

@@ -101,8 +101,8 @@ steps:
     - nvidia-smi
     # Run all models and attn backends but only Inductor partition and native custom ops
     - pytest -v -s tests/compile/fusions_e2e/test_tp1_quant.py -k "inductor_partition and not +rms_norm and not +quant_fp8"
-    # Qwen requires +quant_fp8 as -quant_fp8 rms+quant fusion is not supported
-    - pytest -v -s tests/compile/fusions_e2e/test_tp1_quant.py -k "inductor_partition and not +rms_norm and +quant_fp8 and qwen3"
+    # Qwen/Deepseek requires +quant_fp8 as -quant_fp8 rms+quant fusion is not supported
+    - pytest -v -s tests/compile/fusions_e2e/test_tp1_quant.py -k "inductor_partition and not +rms_norm and +quant_fp8 and (qwen3 or deepseek)"
 
 - label: Fusion E2E Config Sweep (H100)
   timeout_in_minutes: 30
@@ -132,9 +132,9 @@ steps:
   commands:
     - nvidia-smi
     # Run all models but only FLASHINFER, Inductor partition and native custom ops
-    # Qwen requires +quant_fp8 as -quant_fp8 rms+quant fusion is not supported
+    # Qwen/Deepseek requires +quant_fp8 as -quant_fp8 rms+quant fusion is not supported
     # Run just llama3 (fp8 & fp4) for all config combinations (only inductor partition)
-    - pytest -v -s tests/compile/fusions_e2e/test_tp1_quant.py -k "inductor_partition and (FLASHINFER and not +rms_norm and (not +quant_fp8 or +quant_fp8 and qwen3) or llama-3)"
+    - pytest -v -s tests/compile/fusions_e2e/test_tp1_quant.py -k "inductor_partition and (FLASHINFER and not +rms_norm and (not +quant_fp8 or +quant_fp8 and (qwen3 or deepseek)) or llama-3)"
 
 - label: Fusion E2E TP2 Quick (H100)
   timeout_in_minutes: 20
@@ -150,8 +150,8 @@ steps:
   commands:
     - nvidia-smi
     # Run all models and attn backends but only Inductor partition and native custom ops
-    - pytest -v -s tests/compile/fusions_e2e/test_tp2_ar_rms.py -k "inductor_partition and not +rms_norm and not +quant_fp8"
-    - pytest -v -s tests/compile/fusions_e2e/test_tp2_async_tp.py -k "inductor_partition and not +rms_norm and not +quant_fp8"
+    - pytest -v -s tests/compile/fusions_e2e/test_tp2_ar_rms.py -k "inductor_partition and not +rms_norm and (not +quant_fp8 or +quant_fp8 and (qwen3 or deepseek))"
+    - pytest -v -s tests/compile/fusions_e2e/test_tp2_async_tp.py -k "inductor_partition and not +rms_norm and (not +quant_fp8 or +quant_fp8 and (qwen3 or deepseek))"
 
 - label: Fusion E2E TP2 AR-RMS Config Sweep (H100)
   timeout_in_minutes: 40
@@ -205,7 +205,7 @@ steps:
   commands:
     - nvidia-smi
     # Run all models but only FLASHINFER, Inductor partition and native custom ops
-    # include qwen with +quant_fp8 as -quant_fp8 rms+quant fusion is not supported
+    # include qwen/deepseek with +quant_fp8 as -quant_fp8 rms+quant fusion is not supported
     # for ar-rms-quant-fp4, also sweep llama3
-    - pytest -v -s tests/compile/fusions_e2e/test_tp2_ar_rms.py -k "(FLASHINFER and inductor_partition and not +rms_norm and (not +quant_fp8 or +quant_fp8 and qwen3)) or Llama-3.1-8B-Instruct-FP4"
-    - pytest -v -s tests/compile/fusions_e2e/test_tp2_async_tp.py -k "FLASHINFER and inductor_partition and not +rms_norm and (not +quant_fp8 or +quant_fp8 and qwen3)"
+    - pytest -v -s tests/compile/fusions_e2e/test_tp2_ar_rms.py -k "(FLASHINFER and inductor_partition and not +rms_norm and (not +quant_fp8 or +quant_fp8 and (qwen3 or deepseek))) or Llama-3.1-8B-Instruct-FP4"
+    - pytest -v -s tests/compile/fusions_e2e/test_tp2_async_tp.py -k "FLASHINFER and inductor_partition and not +rms_norm and (not +quant_fp8 or +quant_fp8 and (qwen3 or deepseek))"

.buildkite/test_areas/distributed.yaml

@@ -50,24 +50,18 @@ steps:
   - CUDA_VISIBLE_DEVICES=0,1 pytest -v -s v1/shutdown
   - pytest -v -s v1/worker/test_worker_memory_snapshot.py
 
-- label: Distributed Tests (4 GPUs)
-  timeout_in_minutes: 50
+- label: Distributed Torchrun + Examples (4 GPUs)
+  timeout_in_minutes: 30
   working_dir: "/vllm-workspace/tests"
   num_devices: 4
   source_file_dependencies:
   - vllm/distributed/
-  - tests/distributed/test_utils
-  - tests/distributed/test_pynccl
-  - tests/distributed/test_events
-  - tests/compile/fullgraph/test_basic_correctness.py
+  - tests/distributed/test_torchrun_example.py
+  - tests/distributed/test_torchrun_example_moe.py
   - examples/offline_inference/rlhf.py
   - examples/offline_inference/rlhf_colocate.py
   - examples/offline_inference/new_weight_syncing/
   - tests/examples/offline_inference/data_parallel.py
-  - tests/v1/distributed
-  - tests/v1/engine/test_engine_core_client.py
-  - tests/distributed/test_symm_mem_allreduce.py
-  - tests/distributed/test_multiproc_executor.py
   commands:
   # https://github.com/NVIDIA/nccl/issues/1838
   - export NCCL_CUMEM_HOST_ENABLE=0
@@ -85,21 +79,6 @@ steps:
   - TP_SIZE=2 DP_SIZE=2 ENABLE_EP=1 torchrun --nproc-per-node=4 distributed/test_torchrun_example_moe.py
   # test with internal dp
   - python3 ../examples/offline_inference/data_parallel.py --enforce-eager
-  - TP_SIZE=2 DP_SIZE=2 pytest -v -s v1/distributed/test_async_llm_dp.py
-  - TP_SIZE=2 DP_SIZE=2 pytest -v -s v1/distributed/test_eagle_dp.py
-  - TP_SIZE=2 DP_SIZE=2 pytest -v -s v1/distributed/test_external_lb_dp.py
-  - TP_SIZE=1 DP_SIZE=4 pytest -v -s v1/distributed/test_internal_lb_dp.py
-  - TP_SIZE=1 DP_SIZE=4 pytest -v -s v1/distributed/test_hybrid_lb_dp.py
-  - pytest -v -s v1/engine/test_engine_core_client.py::test_kv_cache_events_dp
-  - pytest -v -s distributed/test_utils.py
-  - pytest -v -s compile/fullgraph/test_basic_correctness.py
-  - pytest -v -s distributed/test_pynccl.py
-  - pytest -v -s distributed/test_events.py
-  - pytest -v -s distributed/test_symm_mem_allreduce.py
-  # test multi-node TP with multiproc executor (simulated on single node)
-  - pytest -v -s distributed/test_multiproc_executor.py::test_multiproc_executor_multi_node
-  # TODO: create a dedicated test section for multi-GPU example tests
-  # when we have multiple distributed example tests
   # OLD rlhf examples
   - cd ../examples/offline_inference
   - VLLM_ALLOW_INSECURE_SERIALIZATION=1 python3 rlhf.py
@@ -109,6 +88,47 @@ steps:
   - VLLM_ALLOW_INSECURE_SERIALIZATION=1 python3 rlhf_nccl.py
   - VLLM_ALLOW_INSECURE_SERIALIZATION=1 python3 rlhf_ipc.py
 
+- label: Distributed DP Tests (4 GPUs)
+  timeout_in_minutes: 30
+  working_dir: "/vllm-workspace/tests"
+  num_devices: 4
+  source_file_dependencies:
+  - vllm/distributed/
+  - tests/v1/distributed
+  - tests/v1/engine/test_engine_core_client.py
+  - tests/distributed/test_utils
+  commands:
+  # https://github.com/NVIDIA/nccl/issues/1838
+  - export NCCL_CUMEM_HOST_ENABLE=0
+  - TP_SIZE=2 DP_SIZE=2 pytest -v -s v1/distributed/test_async_llm_dp.py
+  - TP_SIZE=2 DP_SIZE=2 pytest -v -s v1/distributed/test_eagle_dp.py
+  - TP_SIZE=2 DP_SIZE=2 pytest -v -s v1/distributed/test_external_lb_dp.py
+  - TP_SIZE=1 DP_SIZE=4 pytest -v -s v1/distributed/test_internal_lb_dp.py
+  - TP_SIZE=1 DP_SIZE=4 pytest -v -s v1/distributed/test_hybrid_lb_dp.py
+  - pytest -v -s v1/engine/test_engine_core_client.py::test_kv_cache_events_dp
+  - pytest -v -s distributed/test_utils.py
+
+- label: Distributed Compile + Comm (4 GPUs)
+  timeout_in_minutes: 30
+  working_dir: "/vllm-workspace/tests"
+  num_devices: 4
+  source_file_dependencies:
+  - vllm/distributed/
+  - tests/distributed/test_pynccl
+  - tests/distributed/test_events
+  - tests/compile/fullgraph/test_basic_correctness.py
+  - tests/distributed/test_symm_mem_allreduce.py
+  - tests/distributed/test_multiproc_executor.py
+  commands:
+  # https://github.com/NVIDIA/nccl/issues/1838
+  - export NCCL_CUMEM_HOST_ENABLE=0
+  - pytest -v -s compile/fullgraph/test_basic_correctness.py
+  - pytest -v -s distributed/test_pynccl.py
+  - pytest -v -s distributed/test_events.py
+  - pytest -v -s distributed/test_symm_mem_allreduce.py
+  # test multi-node TP with multiproc executor (simulated on single node)
+  - pytest -v -s distributed/test_multiproc_executor.py::test_multiproc_executor_multi_node
+
 - label: Distributed Tests (8 GPUs)(H100)
   timeout_in_minutes: 10
   device: h100
@@ -149,7 +169,7 @@ steps:
   num_devices: 2
   commands:
     - pytest -v -s tests/distributed/test_context_parallel.py
-    # - VLLM_ALLOW_INSECURE_SERIALIZATION=1 python3 examples/offline_inference/new_weight_syncing/rlhf_async_new_apis.py --- failing, need to re-enable
+    - VLLM_ALLOW_INSECURE_SERIALIZATION=1 python3 examples/offline_inference/new_weight_syncing/rlhf_async_new_apis.py
     - VLLM_USE_DEEP_GEMM=1 VLLM_LOGGING_LEVEL=DEBUG python3 examples/offline_inference/data_parallel.py --model=Qwen/Qwen1.5-MoE-A2.7B -tp=1 -dp=2 --max-model-len=2048 --all2all-backend=deepep_high_throughput
     - pytest -v -s tests/v1/distributed/test_dbo.py
 

.buildkite/test_areas/engine.yaml

@@ -1,5 +1,5 @@
 group: Engine
-depends_on: 
+depends_on:
   - image-build
 steps:
 - label: Engine
@@ -14,28 +14,30 @@ steps:
   commands:
   - pytest -v -s engine test_sequence.py test_config.py test_logger.py test_vllm_port.py
 
-- label: V1 e2e + engine (1 GPU)
-  timeout_in_minutes: 45
+- label: Engine (1 GPU)
+  timeout_in_minutes: 30
   source_file_dependencies:
-    - vllm/
-    - tests/v1
+    - vllm/v1/engine/
+    - tests/v1/engine/
   commands:
-    # TODO: accuracy does not match, whether setting
-    # VLLM_USE_FLASHINFER_SAMPLER or not on H100.
-    - pytest -v -s v1/e2e
-    # Run this test standalone for now;
-    # need to untangle use (implicit) use of spawn/fork across the tests.
     - pytest -v -s v1/engine/test_preprocess_error_handling.py
-    # Run the rest of v1/engine tests
     - pytest -v -s v1/engine --ignore v1/engine/test_preprocess_error_handling.py
-  mirror:
-    amd:
-      device: mi325_1
-      depends_on:
-      - image-build-amd
-      commands:
-      - pytest -v -s v1/e2e
-      - pytest -v -s v1/engine
+
+- label: e2e Scheduling (1 GPU)
+  timeout_in_minutes: 30
+  source_file_dependencies:
+    - vllm/v1/
+    - tests/v1/e2e/general/
+  commands:
+    - pytest -v -s v1/e2e/general/test_async_scheduling.py
+
+- label: e2e Core (1 GPU)
+  timeout_in_minutes: 30
+  source_file_dependencies:
+    - vllm/v1/
+    - tests/v1/e2e/general/
+  commands:
+    - pytest -v -s v1/e2e/general --ignore v1/e2e/general/test_async_scheduling.py
 
 - label: V1 e2e (2 GPUs)
   timeout_in_minutes: 60 # TODO: Fix timeout after we have more confidence in the test stability
@@ -46,7 +48,7 @@ steps:
     - tests/v1/e2e
   commands:
     # Only run tests that need exactly 2 GPUs
-    - pytest -v -s v1/e2e/test_spec_decode.py -k "tensor_parallelism"
+    - pytest -v -s v1/e2e/spec_decode/test_spec_decode.py -k "tensor_parallelism"
   mirror:
     amd:
       device: mi325_2
@@ -62,7 +64,7 @@ steps:
     - tests/v1/e2e
   commands:
     # Only run tests that need 4 GPUs
-    - pytest -v -s v1/e2e/test_spec_decode.py -k "eagle_correctness_heavy"
+    - pytest -v -s v1/e2e/spec_decode/test_spec_decode.py -k "eagle_correctness_heavy"
   mirror:
     amd:
       device: mi325_4

.buildkite/test_areas/entrypoints.yaml

@@ -24,11 +24,6 @@ steps:
   - pytest -v -s entrypoints/llm --ignore=entrypoints/llm/test_generate.py --ignore=entrypoints/llm/test_collective_rpc.py
   - pytest -v -s entrypoints/llm/test_generate.py # it needs a clean process
   - pytest -v -s entrypoints/offline_mode # Needs to avoid interference with other tests
-  mirror:
-    amd:
-      device: mi325_1
-      depends_on:
-      - image-build-amd
 
 - label: Entrypoints Integration (API Server 1)
   timeout_in_minutes: 130
@@ -39,7 +34,7 @@ steps:
   - tests/entrypoints/test_chat_utils
   commands:
   - export VLLM_WORKER_MULTIPROC_METHOD=spawn
-  - pytest -v -s entrypoints/openai --ignore=entrypoints/openai/test_chat_with_tool_reasoning.py --ignore=entrypoints/openai/test_oot_registration.py --ignore=entrypoints/openai/test_tensorizer_entrypoint.py --ignore=entrypoints/openai/correctness/  --ignore=entrypoints/openai/tool_parsers/ --ignore=entrypoints/openai/responses
+  - pytest -v -s entrypoints/openai --ignore=entrypoints/openai/chat_completion/test_chat_with_tool_reasoning.py --ignore=entrypoints/openai/test_oot_registration.py --ignore=entrypoints/openai/test_tensorizer_entrypoint.py --ignore=entrypoints/openai/correctness/  --ignore=entrypoints/openai/tool_parsers/ --ignore=entrypoints/openai/responses
   - pytest -v -s entrypoints/test_chat_utils.py
   mirror:
     amd:
@@ -60,11 +55,6 @@ steps:
   - pytest -v -s entrypoints/instrumentator
   - PYTHONPATH=/vllm-workspace pytest -v -s entrypoints/rpc
   - pytest -v -s tool_use
-  mirror:
-    amd:
-      device: mi325_1
-      depends_on:
-      - image-build-amd
 
 - label: Entrypoints Integration (Pooling)
   timeout_in_minutes: 50
@@ -75,11 +65,6 @@ steps:
   commands:
   - export VLLM_WORKER_MULTIPROC_METHOD=spawn
   - pytest -v -s entrypoints/pooling
-  mirror:
-    amd:
-      device: mi325_1
-      depends_on:
-      - image-build-amd
 
 - label: Entrypoints Integration (Responses API)
   timeout_in_minutes: 50

.buildkite/test_areas/kernels.yaml

@@ -8,8 +8,9 @@ steps:
   - csrc/
   - tests/kernels/core
   - tests/kernels/test_top_k_per_row.py
+  - tests/kernels/test_concat_mla_q.py
   commands:
-    - pytest -v -s kernels/core kernels/test_top_k_per_row.py
+    - pytest -v -s kernels/core kernels/test_top_k_per_row.py kernels/test_concat_mla_q.py
 
 - label: Kernels Attention Test %N
   timeout_in_minutes: 35
@@ -96,7 +97,7 @@ steps:
   - vllm/platforms/cuda.py
   commands:
     - nvidia-smi
-    - python3 examples/offline_inference/basic/chat.py
+    - python3 examples/basic/offline_inference/chat.py
     # Attention
     # num_heads2 broken by https://github.com/flashinfer-ai/flashinfer/issues/1353
     - pytest -v -s tests/kernels/attention/test_attention_selector.py

.buildkite/test_areas/lm_eval.yaml

@@ -45,6 +45,22 @@ steps:
   commands:
   - pytest -s -v evals/gsm8k/test_gsm8k_correctness.py --config-list-file=configs/models-blackwell.txt
 
+- label: LM Eval Qwen3.5 Models (B200)
+  timeout_in_minutes: 120
+  device: b200
+  optional: true
+  num_devices: 2
+  source_file_dependencies:
+  - vllm/model_executor/models/qwen3_5.py
+  - vllm/model_executor/models/qwen3_5_mtp.py
+  - vllm/transformers_utils/configs/qwen3_5.py
+  - vllm/transformers_utils/configs/qwen3_5_moe.py
+  - vllm/model_executor/models/qwen3_next.py
+  - vllm/model_executor/models/qwen3_next_mtp.py
+  - vllm/model_executor/layers/fla/ops/
+  commands:
+    - pytest -s -v evals/gsm8k/test_gsm8k_correctness.py --config-list-file=configs/models-qwen35-blackwell.txt
+
 - label: LM Eval Large Models (H200)
   timeout_in_minutes: 60
   device: h200

.buildkite/test_areas/misc.yaml

@@ -67,12 +67,13 @@ steps:
   - examples/
   commands:
     - pip install tensorizer # for tensorizer test
-    - python3 offline_inference/basic/chat.py # for basic
-    - python3 offline_inference/basic/generate.py --model facebook/opt-125m
-    - python3 offline_inference/basic/generate.py --model meta-llama/Llama-2-13b-chat-hf --cpu-offload-gb 10
-    - python3 offline_inference/basic/classify.py
-    - python3 offline_inference/basic/embed.py
-    - python3 offline_inference/basic/score.py
+     # for basic
+    - python3 basic/offline_inference/chat.py
+    - python3 basic/offline_inference/generate.py --model facebook/opt-125m
+    - python3 basic/offline_inference/generate.py --model meta-llama/Llama-2-13b-chat-hf --cpu-offload-gb 10
+    - python3 basic/offline_inference/classify.py
+    - python3 basic/offline_inference/embed.py
+    - python3 basic/offline_inference/score.py
     # for multi-modal models
     - python3 offline_inference/audio_language.py --seed 0
     - python3 offline_inference/vision_language.py --seed 0
@@ -87,11 +88,6 @@ steps:
     - python3 offline_inference/spec_decode.py --test --method eagle --num_spec_tokens 3 --dataset-name hf --dataset-path philschmid/mt-bench --num-prompts 80 --temp 0 --top-p 1.0 --top-k -1 --tp 1 --enable-chunked-prefill --max-model-len 2048
     # https://github.com/vllm-project/vllm/pull/26682 uses slightly more memory in PyTorch 2.9+ causing this test to OOM in 1xL4 GPU
     - python3 offline_inference/spec_decode.py --test --method eagle3 --num_spec_tokens 3 --dataset-name hf --dataset-path philschmid/mt-bench --num-prompts 80 --temp 0 --top-p 1.0 --top-k -1 --tp 1 --enable-chunked-prefill --max-model-len 1536
-  mirror:
-    amd:
-      device: mi325_1
-      depends_on:
-      - image-build-amd
 
 - label: Metrics, Tracing (2 GPUs)
   timeout_in_minutes: 20

.buildkite/test_areas/model_runner_v2.yaml

@@ -0,0 +1,110 @@
+group: Model Runner V2
+depends_on:
+  - image-build
+steps:
+- label: Model Runner V2 Core Tests
+  timeout_in_minutes: 45
+  source_file_dependencies:
+  - vllm/v1/worker/gpu/
+  - vllm/v1/worker/gpu_worker.py
+  - vllm/v1/core/sched/
+  - vllm/v1/attention/
+  - tests/v1/engine/test_llm_engine.py
+  - tests/v1/e2e/
+  - tests/v1/entrypoints/llm/test_struct_output_generate.py
+  commands:
+  - set -x
+  - export VLLM_USE_V2_MODEL_RUNNER=1
+  - pytest -v -s v1/engine/test_llm_engine.py -k "not test_engine_metrics"
+  # This requires eager until we sort out CG correctness issues.
+  # TODO: remove ENFORCE_EAGER here after https://github.com/vllm-project/vllm/pull/32936 is merged.
+  - ENFORCE_EAGER=1 pytest -v -s v1/e2e/general/test_async_scheduling.py -k "not ngram"
+  - pytest -v -s v1/e2e/general/test_context_length.py
+  - pytest -v -s v1/e2e/general/test_min_tokens.py
+  # Temporary hack filter to exclude ngram spec decoding based tests.
+  - pytest -v -s v1/entrypoints/llm/test_struct_output_generate.py -k "xgrammar and not speculative_config6 and not speculative_config7 and not speculative_config8 and not speculative_config0"
+
+- label: Model Runner V2 Examples
+  timeout_in_minutes: 45
+  working_dir: "/vllm-workspace/examples"
+  source_file_dependencies:
+    - vllm/v1/worker/gpu/
+    - vllm/v1/core/sched/
+    - vllm/v1/worker/gpu_worker.py
+    - examples/offline_inference/
+    - examples/basic/offline_inference/
+    - examples/pooling/embed/vision_embedding_offline.py
+    - examples/others/tensorize_vllm_model.py
+  commands:
+    - set -x
+    - export VLLM_USE_V2_MODEL_RUNNER=1
+    - pip install tensorizer # for tensorizer test
+    - python3 basic/offline_inference/chat.py # for basic
+    - python3 basic/offline_inference/generate.py --model facebook/opt-125m
+    #- python3 basic/offline_inference/generate.py --model meta-llama/Llama-2-13b-chat-hf --cpu-offload-gb 10  # TODO
+    #- python3 basic/offline_inference/embed.py   # TODO
+    # for multi-modal models
+    - python3 offline_inference/audio_language.py --seed 0
+    - python3 offline_inference/vision_language.py --seed 0
+    - python3 offline_inference/vision_language_multi_image.py --seed 0
+    - python3 offline_inference/encoder_decoder_multimodal.py --model-type whisper --seed 0
+    # for pooling models
+    - python3 pooling/embed/vision_embedding_offline.py --seed 0
+    # for features demo
+    - python3 offline_inference/prefix_caching.py
+    - python3 offline_inference/llm_engine_example.py
+    - python3 others/tensorize_vllm_model.py --model facebook/opt-125m serialize --serialized-directory /tmp/ --suffix v1 && python3 others/tensorize_vllm_model.py --model facebook/opt-125m deserialize --path-to-tensors /tmp/vllm/facebook/opt-125m/v1/model.tensors
+    - python3 offline_inference/spec_decode.py --test --method eagle --num_spec_tokens 3 --dataset-name hf --dataset-path philschmid/mt-bench --num-prompts 80 --temp 0 --top-p 1.0 --top-k -1 --tp 1 --enable-chunked-prefill --max-model-len 2048
+    # https://github.com/vllm-project/vllm/pull/26682 uses slightly more memory in PyTorch 2.9+ causing this test to OOM in 1xL4 GPU
+    - python3 offline_inference/spec_decode.py --test --method eagle3 --num_spec_tokens 3 --dataset-name hf --dataset-path philschmid/mt-bench --num-prompts 80 --temp 0 --top-p 1.0 --top-k -1 --tp 1 --enable-chunked-prefill --max-model-len 1536
+
+- label: Model Runner V2 Distributed (2 GPUs)
+  timeout_in_minutes: 45
+  working_dir: "/vllm-workspace/tests"
+  num_devices: 2
+  source_file_dependencies:
+    - vllm/v1/worker/gpu/
+    - vllm/v1/worker/gpu_worker.py
+    - tests/basic_correctness/test_basic_correctness.py
+    - tests/v1/distributed/test_async_llm_dp.py
+    - tests/v1/distributed/test_eagle_dp.py
+  commands:
+    - set -x
+    - export VLLM_USE_V2_MODEL_RUNNER=1
+    # The "and not True" here is a hacky way to exclude the prompt_embeds cases which aren't yet supported.
+    - TARGET_TEST_SUITE=L4 pytest -v -s basic_correctness/test_basic_correctness.py -m 'distributed(num_gpus=2)' -k "not ray and not True"
+    # https://github.com/NVIDIA/nccl/issues/1838
+    - export NCCL_CUMEM_HOST_ENABLE=0
+    - TP_SIZE=1 DP_SIZE=2 pytest -v -s v1/distributed/test_async_llm_dp.py -k "not ray"
+    - TP_SIZE=1 DP_SIZE=2 pytest -v -s v1/distributed/test_eagle_dp.py
+
+# These require fix https://github.com/vllm-project/vllm/pull/36280
+- label: Model Runner V2 Pipeline Parallelism (4 GPUs)
+  timeout_in_minutes: 60
+  working_dir: "/vllm-workspace/tests"
+  num_devices: 4
+  source_file_dependencies:
+    - vllm/v1/worker/gpu/
+    - vllm/v1/worker/gpu_worker.py
+    - tests/distributed/test_pipeline_parallel.py
+    #- tests/distributed/test_pp_cudagraph.py
+  commands:
+    - set -x
+    - export VLLM_USE_V2_MODEL_RUNNER=1
+    - pytest -v -s distributed/test_pipeline_parallel.py -k "not ray and not Jamba"
+    # TODO: Uncomment once https://github.com/vllm-project/vllm/pull/35162 is merged.
+    #- pytest -v -s distributed/test_pp_cudagraph.py -k "not ray"
+
+- label: Model Runner V2 Spec Decode
+  timeout_in_minutes: 30
+  working_dir: "/vllm-workspace/tests"
+  source_file_dependencies:
+  - vllm/v1/worker/gpu/
+  - vllm/v1/worker/gpu_worker.py
+  - tests/v1/spec_decode/test_max_len.py
+  - tests/v1/e2e/spec_decode/test_spec_decode.py
+  commands:
+  - set -x
+  - export VLLM_USE_V2_MODEL_RUNNER=1
+  - pytest -v -s v1/spec_decode/test_max_len.py -k "eagle or mtp"
+  - pytest -v -s v1/e2e/spec_decode/test_spec_decode.py -k "eagle or mtp"

.buildkite/test_areas/models_basic.yaml

@@ -65,7 +65,7 @@ steps:
     - pytest -v -s tests/models/test_transformers.py
     - pytest -v -s tests/models/multimodal/processing/
     - pytest -v -s tests/models/multimodal/test_mapping.py
-    - python3 examples/offline_inference/basic/chat.py
+    - python3 examples/basic/offline_inference/chat.py
     - python3 examples/offline_inference/vision_language.py --model-type qwen2_5_vl
     # Whisper needs spawn method to avoid deadlock
     - VLLM_WORKER_MULTIPROC_METHOD=spawn python3 examples/offline_inference/audio_language.py --model-type whisper

.buildkite/test_areas/models_multimodal.yaml

@@ -2,15 +2,59 @@ group: Models - Multimodal
 depends_on: 
   - image-build
 steps:
-- label: Multi-Modal Models (Standard) # 60min
-  timeout_in_minutes: 80
+- label: "Multi-Modal Models (Standard) 1: qwen2"
+  timeout_in_minutes: 45
   source_file_dependencies:
   - vllm/
   - tests/models/multimodal
   commands:
     - pip install git+https://github.com/TIGER-AI-Lab/Mantis.git
-    - pip freeze | grep -E 'torch'
-    - pytest -v -s models/multimodal -m core_model --ignore models/multimodal/generation/test_whisper.py --ignore models/multimodal/processing
+    - pytest -v -s models/multimodal/generation/test_common.py -m core_model -k "qwen2"
+    - pytest -v -s models/multimodal/generation/test_ultravox.py -m core_model
+  mirror:
+    amd:
+      device: mi325_1
+      depends_on:
+      - image-build-amd
+
+- label: "Multi-Modal Models (Standard) 2: qwen3 + gemma"
+  timeout_in_minutes: 45
+  source_file_dependencies:
+  - vllm/
+  - tests/models/multimodal
+  commands:
+    - pip install git+https://github.com/TIGER-AI-Lab/Mantis.git
+    - pytest -v -s models/multimodal/generation/test_common.py -m core_model -k "qwen3 or gemma"
+    - pytest -v -s models/multimodal/generation/test_qwen2_5_vl.py -m core_model
+  mirror:
+    amd:
+      device: mi325_1
+      depends_on:
+      - image-build-amd
+
+- label: "Multi-Modal Models (Standard) 3: llava + qwen2_vl"
+  timeout_in_minutes: 45
+  source_file_dependencies:
+  - vllm/
+  - tests/models/multimodal
+  commands:
+    - pip install git+https://github.com/TIGER-AI-Lab/Mantis.git
+    - pytest -v -s models/multimodal/generation/test_common.py -m core_model -k "not qwen2 and not qwen3 and not gemma"
+    - pytest -v -s models/multimodal/generation/test_qwen2_vl.py -m core_model
+  mirror:
+    amd:
+      device: mi325_1
+      depends_on:
+      - image-build-amd
+
+- label: "Multi-Modal Models (Standard) 4: other + whisper"
+  timeout_in_minutes: 45
+  source_file_dependencies:
+  - vllm/
+  - tests/models/multimodal
+  commands:
+    - pip install git+https://github.com/TIGER-AI-Lab/Mantis.git
+    - pytest -v -s models/multimodal -m core_model --ignore models/multimodal/generation/test_common.py --ignore models/multimodal/generation/test_ultravox.py --ignore models/multimodal/generation/test_qwen2_5_vl.py --ignore models/multimodal/generation/test_qwen2_vl.py --ignore models/multimodal/generation/test_whisper.py --ignore models/multimodal/processing
     - cd .. && VLLM_WORKER_MULTIPROC_METHOD=spawn pytest -v -s tests/models/multimodal/generation/test_whisper.py -m core_model  # Otherwise, mp_method="spawn" doesn't work
   mirror:
     amd:

.buildkite/test_areas/plugins.yaml

@@ -39,8 +39,3 @@ steps:
   - pytest -v -s entrypoints/openai/test_oot_registration.py # it needs a clean process
   - pytest -v -s models/test_oot_registration.py # it needs a clean process
   - pytest -v -s plugins/lora_resolvers # unit tests for in-tree lora resolver plugins
-  mirror:
-    amd:
-      device: mi325_2
-      depends_on:
-      - image-build-amd

.buildkite/test_areas/spec_decode.yaml

@@ -0,0 +1,40 @@
+group: Spec Decode
+depends_on:
+  - image-build
+steps:
+- label: Spec Decode Eagle
+  timeout_in_minutes: 30
+  source_file_dependencies:
+    - vllm/v1/spec_decode/
+    - vllm/v1/worker/gpu/spec_decode/
+    - tests/v1/e2e/spec_decode/
+  commands:
+    - pytest -v -s v1/e2e/spec_decode -k "eagle_correctness"
+
+- label: Spec Decode Speculators + MTP
+  timeout_in_minutes: 30
+  source_file_dependencies:
+    - vllm/v1/spec_decode/
+    - vllm/v1/worker/gpu/spec_decode/
+    - vllm/transformers_utils/configs/speculators/
+    - tests/v1/e2e/spec_decode/
+  commands:
+    - pytest -v -s v1/e2e/spec_decode -k "speculators or mtp_correctness"
+
+- label: Spec Decode Ngram + Suffix
+  timeout_in_minutes: 30
+  source_file_dependencies:
+    - vllm/v1/spec_decode/
+    - vllm/v1/worker/gpu/spec_decode/
+    - tests/v1/e2e/spec_decode/
+  commands:
+    - pytest -v -s v1/e2e/spec_decode -k "ngram or suffix"
+
+- label: Spec Decode Draft Model
+  timeout_in_minutes: 30
+  source_file_dependencies:
+    - vllm/v1/spec_decode/
+    - vllm/v1/worker/gpu/spec_decode/
+    - tests/v1/e2e/spec_decode/
+  commands:
+    - pytest -v -s v1/e2e/spec_decode -k "draft_model or no_sync or batch_inference"

.github/mergify.yml

@@ -27,7 +27,7 @@ pull_request_rules:
         Hi @{{author}}, the pre-commit checks have failed. Please run:
 
         ```bash 
-        uv pip install pre-commit
+        uv pip install pre-commit>=4.5.1
         pre-commit install
         pre-commit run --all-files
         ```
@@ -38,15 +38,13 @@ pull_request_rules:
 
         > [!TIP]
         > <details>
-        > <summary>Is <code>mypy</code> or <code>markdownlint</code> failing?</summary>
+        > <summary>Is <code>mypy</code> failing?</summary>
         > <br/>
-        > <code>mypy</code> and <code>markdownlint</code> are run differently in CI. If the failure is related to either of these checks, please use the following commands to run them locally:
+        > <code>mypy</code> is run differently in CI. If the failure is related to this check, please use the following command to run it locally:
         >
         > ```bash
         > # For mypy (substitute "3.10" with the failing version if needed)
         > pre-commit run --hook-stage manual mypy-3.10
-        > # For markdownlint
-        > pre-commit run --hook-stage manual markdownlint
         > ```
         > </details>
 
@@ -336,7 +334,7 @@ pull_request_rules:
     - or:
       - files~=^tests/tool_use/
       - files~=^tests/entrypoints/openai/tool_parsers/
-      - files=tests/entrypoints/openai/test_chat_with_tool_reasoning.py
+      - files=tests/entrypoints/openai/chat_completion/test_chat_with_tool_reasoning.py
       - files~=^vllm/entrypoints/openai/tool_parsers/
       - files=docs/features/tool_calling.md
       - files~=^examples/tool_chat_*

.gitignore

@@ -189,11 +189,9 @@ cython_debug/
 .vscode/
 
 # Claude
-CLAUDE.md
 .claude/
 
 # Codex
-AGENTS.md
 .codex/
 
 # Cursor

.pre-commit-config.yaml

@@ -24,12 +24,13 @@ repos:
     exclude: 'csrc/(moe/topk_softmax_kernels.cu|quantization/gguf/(ggml-common.h|dequantize.cuh|vecdotq.cuh|mmq.cuh|mmvq.cuh))|vllm/third_party/.*'
     types_or: [c++, cuda]
     args: [--style=file, --verbose]
-- repo: https://github.com/igorshubovych/markdownlint-cli
-  rev: v0.45.0
+- repo: https://github.com/DavidAnson/markdownlint-cli2
+  rev: v0.21.0
   hooks:
-  - id: markdownlint
-    exclude: '.*\.inc\.md'
-    stages: [manual] # Only run in CI
+  - id: markdownlint-cli2
+    language_version: lts
+    args: [--fix]
+    exclude: ^CLAUDE\.md$
 - repo: https://github.com/rhysd/actionlint
   rev: v1.7.7
   hooks:
@@ -55,7 +56,7 @@ repos:
       language: python
       types_or: [python, pyi]
       require_serial: true
-      additional_dependencies: ["mypy[faster-cache]==1.15.0", regex, types-cachetools, types-setuptools, types-PyYAML, types-requests, types-torch, pydantic]
+      additional_dependencies: ["mypy[faster-cache]==1.19.1", regex, types-cachetools, types-setuptools, types-PyYAML, types-requests, types-torch, pydantic]
   - id: mypy-3.10 # TODO: Use https://github.com/pre-commit/mirrors-mypy when mypy setup is less awkward
     name: Run mypy for Python 3.10
     entry: python tools/pre_commit/mypy.py 1 "3.10"

.readthedocs.yaml

@@ -9,7 +9,7 @@ build:
     python: "3.12"
   jobs:
     post_checkout:
-      - bash docs/maybe_skip_pr_build.sh
+      # - bash docs/maybe_skip_pr_build.sh
       - git fetch origin main --unshallow --no-tags --filter=blob:none || true
     pre_create_environment:
       - pip install uv

AGENTS.md

@@ -0,0 +1,113 @@
+# Agent Instructions for vLLM
+
+> These instructions apply to **all** AI-assisted contributions to `vllm-project/vllm`.
+> Breaching these guidelines can result in automatic banning.
+
+## 1. Contribution Policy (Mandatory)
+
+### Duplicate-work checks
+
+Before proposing a PR, run these checks:
+
+```bash
+gh issue view <issue_number> --repo vllm-project/vllm --comments
+gh pr list --repo vllm-project/vllm --state open --search "<issue_number> in:body"
+gh pr list --repo vllm-project/vllm --state open --search "<short area keywords>"
+```
+
+- If an open PR already addresses the same fix, do not open another.
+- If your approach is materially different, explain the difference in the issue.
+
+### No low-value busywork PRs
+
+Do not open one-off PRs for tiny edits (single typo, isolated style change, one mutable default, etc.). Mechanical cleanups are acceptable only when bundled with substantive work.
+
+### Accountability
+
+- Pure code-agent PRs are **not allowed**. A human submitter must understand and defend the change end-to-end.
+- The submitting human must review every changed line and run relevant tests.
+- PR descriptions for AI-assisted work **must** include:
+    - Why this is not duplicating an existing PR.
+    - Test commands run and results.
+    - Clear statement that AI assistance was used.
+
+### Fail-closed behavior
+
+If work is duplicate/trivial busywork, **do not proceed**. Return a short explanation of what is missing.
+
+---
+
+## 2. Development Workflow
+
+### Environment setup
+
+```bash
+# Install `uv` if you don't have it already:
+curl -LsSf https://astral.sh/uv/install.sh | sh
+
+# Always use `uv` for Python environment management:
+uv venv --python 3.12
+source .venv/bin/activate
+
+# Always make sure `pre-commit` and its hooks are installed:
+uv pip install -r requirements/lint.txt
+pre-commit install
+```
+
+### Installing dependencies
+
+```bash
+# If you are only making Python changes:
+VLLM_USE_PRECOMPILED=1 uv pip install -e .
+
+# If you are also making C/C++ changes:
+uv pip install -e .
+```
+
+### Running tests
+
+Tests require extra dependencies.
+All versions for test dependencies should be read from `requirements/test.txt`
+
+```bash
+# Install bare minimum test dependencies:
+uv pip install pytest pytest-asyncio tblib
+
+# Install additional test dependencies as needed, or install them all as follows:
+uv pip install -r requirements/test.txt
+
+# Run specific test from specific test file
+pytest tests/path/to/test.py -v -s -k test_name
+
+# Run all tests in directory
+pytest tests/path/to/dir -v -s
+```
+
+### Running linters
+
+```bash
+# Run all pre-commit hooks on staged files:
+pre-commit run
+
+# Run on all files:
+pre-commit run --all-files
+
+# Run a specific hook:
+pre-commit run ruff-check --all-files
+
+# Run mypy as it is in CI:
+pre-commit run mypy-3.10 --all-files --hook-stage manual
+```
+
+### Commit messages
+
+Add attribution using commit trailers such as `Co-authored-by:` (other projects use `Assisted-by:` or `Generated-by:`). For example:
+
+```text
+Your commit message here
+
+Co-authored-by: GitHub Copilot
+Co-authored-by: Claude
+Co-authored-by: gemini-code-assist
+Signed-off-by: Your Name <your.email@example.com>
+```

CLAUDE.md

@@ -0,0 +1 @@
+@AGENTS.md

CMakeLists.txt

@@ -37,7 +37,7 @@ install(CODE "set(CMAKE_INSTALL_LOCAL_ONLY TRUE)" ALL_COMPONENTS)
 set(PYTHON_SUPPORTED_VERSIONS "3.10" "3.11" "3.12" "3.13")
 
 # Supported AMD GPU architectures.
-set(HIP_SUPPORTED_ARCHS "gfx906;gfx908;gfx90a;gfx942;gfx950;gfx1030;gfx1100;gfx1101;gfx1200;gfx1201;gfx1150;gfx1151")
+set(HIP_SUPPORTED_ARCHS "gfx906;gfx908;gfx90a;gfx942;gfx950;gfx1030;gfx1100;gfx1101;gfx1150;gfx1151;gfx1152;gfx1153;gfx1200;gfx1201")
 
 # ROCm installation prefix. Default to /opt/rocm but allow override via
 # -DROCM_PATH=/your/rocm/path when invoking cmake.

benchmarks/attention_benchmarks/README.md

@@ -187,7 +187,7 @@ python benchmark.py \
 ## Hardware Requirements
 
 | Backend | Hardware |
-|---------|----------|
+| ------- | -------- |
 | Flash/Triton/FlashInfer | Any CUDA GPU |
 | CUTLASS MLA | Blackwell (SM100+) |
 | FlashAttn MLA | Hopper (SM90+) |

benchmarks/attention_benchmarks/benchmark.py

@@ -59,7 +59,9 @@ def run_mla_benchmark(config: BenchmarkConfig, **kwargs) -> BenchmarkResult:
     """Run MLA benchmark with appropriate backend."""
     from mla_runner import run_mla_benchmark as run_mla
 
-    return run_mla(config.backend, config, **kwargs)
+    return run_mla(
+        config.backend, config, prefill_backend=config.prefill_backend, **kwargs
+    )
 
 
 def run_benchmark(config: BenchmarkConfig, **kwargs) -> BenchmarkResult:
@@ -440,14 +442,21 @@ def main():
     # Backend selection
     parser.add_argument(
         "--backends",
+        "--decode-backends",
         nargs="+",
-        help="Backends to benchmark (flash, triton, flashinfer, cutlass_mla, "
+        help="Decode backends to benchmark (flash, triton, flashinfer, cutlass_mla, "
         "flashinfer_mla, flashattn_mla, flashmla)",
     )
     parser.add_argument(
         "--backend",
         help="Single backend (alternative to --backends)",
     )
+    parser.add_argument(
+        "--prefill-backends",
+        nargs="+",
+        help="Prefill backends to compare (fa2, fa3, fa4). "
+        "Uses the first decode backend for impl construction.",
+    )
 
     # Batch specifications
     parser.add_argument(
@@ -502,7 +511,7 @@ def main():
 
         # Override args with YAML values, but CLI args take precedence
         # Check if CLI provided backends (they would be non-None and not default)
-        cli_backends_provided = args.backends is not None or args.backend is not None
+        cli_backends_provided = args.backend is not None or args.backends is not None
 
         # Backend(s) - only use YAML if CLI didn't specify
         if not cli_backends_provided:
@@ -512,6 +521,12 @@ def main():
             elif "backends" in yaml_config:
                 args.backends = yaml_config["backends"]
                 args.backend = None
+            elif "decode_backends" in yaml_config:
+                args.backends = yaml_config["decode_backends"]
+                args.backend = None
+
+        # Prefill backends (e.g., ["fa3", "fa4"])
+        args.prefill_backends = yaml_config.get("prefill_backends", None)
 
         # Check for special modes
         if "mode" in yaml_config:
@@ -613,7 +628,10 @@ def main():
 
     # Determine backends
     backends = args.backends or ([args.backend] if args.backend else ["flash"])
+    prefill_backends = getattr(args, "prefill_backends", None)
     console.print(f"Backends: {', '.join(backends)}")
+    if prefill_backends:
+        console.print(f"Prefill backends: {', '.join(prefill_backends)}")
     console.print(f"Batch specs: {', '.join(args.batch_specs)}")
     console.print()
 
@@ -850,37 +868,93 @@ def main():
 
     else:
         # Normal mode: compare backends
-        total = len(backends) * len(args.batch_specs)
+        decode_results = []
+        prefill_results = []
 
-        with tqdm(total=total, desc="Benchmarking") as pbar:
-            for spec in args.batch_specs:
-                for backend in backends:
-                    config = BenchmarkConfig(
-                        backend=backend,
-                        batch_spec=spec,
-                        num_layers=args.num_layers,
-                        head_dim=args.head_dim,
-                        num_q_heads=args.num_q_heads,
-                        num_kv_heads=args.num_kv_heads,
-                        block_size=args.block_size,
-                        device=args.device,
-                        repeats=args.repeats,
-                        warmup_iters=args.warmup_iters,
-                        profile_memory=args.profile_memory,
-                    )
+        # Run decode backend comparison
+        if not prefill_backends:
+            # No prefill backends specified: compare decode backends as before
+            total = len(backends) * len(args.batch_specs)
 
-                    result = run_benchmark(config)
-                    all_results.append(result)
+            with tqdm(total=total, desc="Benchmarking") as pbar:
+                for spec in args.batch_specs:
+                    for backend in backends:
+                        config = BenchmarkConfig(
+                            backend=backend,
+                            batch_spec=spec,
+                            num_layers=args.num_layers,
+                            head_dim=args.head_dim,
+                            num_q_heads=args.num_q_heads,
+                            num_kv_heads=args.num_kv_heads,
+                            block_size=args.block_size,
+                            device=args.device,
+                            repeats=args.repeats,
+                            warmup_iters=args.warmup_iters,
+                            profile_memory=args.profile_memory,
+                        )
 
-                    if not result.success:
-                        console.print(f"[red]Error {backend} {spec}: {result.error}[/]")
+                        result = run_benchmark(config)
+                        decode_results.append(result)
 
-                    pbar.update(1)
+                        if not result.success:
+                            console.print(
+                                f"[red]Error {backend} {spec}: {result.error}[/]"
+                            )
 
-        # Display results
-        console.print("\n[bold green]Results:[/]")
-        formatter = ResultsFormatter(console)
-        formatter.print_table(all_results, backends)
+                        pbar.update(1)
+
+            console.print("\n[bold green]Results:[/]")
+            formatter = ResultsFormatter(console)
+            formatter.print_table(decode_results, backends)
+
+        # Run prefill backend comparison
+        if prefill_backends:
+            # Use first decode backend for impl construction
+            decode_backend = backends[0]
+            total = len(prefill_backends) * len(args.batch_specs)
+
+            console.print(
+                f"[yellow]Prefill comparison mode: "
+                f"using {decode_backend} for decode impl[/]"
+            )
+
+            with tqdm(total=total, desc="Prefill benchmarking") as pbar:
+                for spec in args.batch_specs:
+                    for pb in prefill_backends:
+                        config = BenchmarkConfig(
+                            backend=decode_backend,
+                            batch_spec=spec,
+                            num_layers=args.num_layers,
+                            head_dim=args.head_dim,
+                            num_q_heads=args.num_q_heads,
+                            num_kv_heads=args.num_kv_heads,
+                            block_size=args.block_size,
+                            device=args.device,
+                            repeats=args.repeats,
+                            warmup_iters=args.warmup_iters,
+                            profile_memory=args.profile_memory,
+                            prefill_backend=pb,
+                        )
+
+                        result = run_benchmark(config)
+
+                        # Label result with prefill backend name for display
+                        labeled_config = replace(result.config, backend=pb)
+                        result = replace(result, config=labeled_config)
+                        prefill_results.append(result)
+
+                        if not result.success:
+                            console.print(f"[red]Error {pb} {spec}: {result.error}[/]")
+
+                        pbar.update(1)
+
+            console.print("\n[bold green]Prefill Backend Results:[/]")
+            formatter = ResultsFormatter(console)
+            formatter.print_table(
+                prefill_results, prefill_backends, compare_to_fastest=True
+            )
+
+        all_results = decode_results + prefill_results
 
     # Save results
     if all_results:

benchmarks/attention_benchmarks/common.py

@@ -77,6 +77,7 @@ class MockKVBProj:
         self.qk_nope_head_dim = qk_nope_head_dim
         self.v_head_dim = v_head_dim
         self.out_dim = qk_nope_head_dim + v_head_dim
+        self.weight = torch.empty(0, dtype=torch.bfloat16)
 
     def __call__(self, x: torch.Tensor) -> tuple[torch.Tensor]:
         """
@@ -213,6 +214,7 @@ class BenchmarkConfig:
     use_cuda_graphs: bool = False
 
     # MLA-specific
+    prefill_backend: str | None = None
     kv_lora_rank: int | None = None
     qk_nope_head_dim: int | None = None
     qk_rope_head_dim: int | None = None

benchmarks/attention_benchmarks/configs/mla_prefill.yaml

@@ -1,4 +1,19 @@
-# MLA prefill-only benchmark configuration for sparse backends
+# MLA prefill backend comparison
+#
+# Compares all available MLA prefill backends:
+#   FA backends:  fa2, fa3, fa4 (FlashAttention versions)
+#   Non-FA:       flashinfer, cudnn, trtllm (Blackwell-only, require flashinfer)
+#
+# Uses cutlass_mla as the decode backend for impl construction
+# (only the prefill path is exercised).
+#
+# Backends that aren't available on the current platform will report errors
+# in the results table (e.g., fa3 on Blackwell, cudnn without artifactory).
+#
+# Usage:
+#   python benchmark.py --config configs/mla_prefill.yaml
+
+description: "MLA prefill backend comparison"
 
 model:
   name: "deepseek-v3"
@@ -12,20 +27,25 @@ model:
   v_head_dim: 128
   block_size: 128
 
-# Model parameter sweep: simulate tensor parallelism by varying num_q_heads
-# TP=1: 128 heads, TP=2: 64 heads, TP=4: 32 heads, TP=8: 16 heads
-model_parameter_sweep:
-  param_name: "num_q_heads"
-  values: [128, 64, 32, 16]
-  label_format: "{backend}_{value}h"
+# model:
+#   name: "deepseek-v2-lite"
+#   num_layers: 27
+#   num_q_heads: 16
+#   num_kv_heads: 1
+#   head_dim: 576
+#   kv_lora_rank: 512
+#   qk_nope_head_dim: 128
+#   qk_rope_head_dim: 64
+#   v_head_dim: 128
+#   block_size: 128
 
 batch_specs:
   # Pure prefill
-  - "1q512"
-  - "1q1k"
-  - "1q2k"
-  - "1q4k"
-  - "1q8k"
+  - "q512"
+  - "q1k"
+  - "q2k"
+  - "q4k"
+  - "q8k"
 
   # Batched pure prefill
   - "2q512"
@@ -44,19 +64,63 @@ batch_specs:
   - "8q4k"
   - "8q8k"
 
-  # Extend
-  - "1q512s4k"
-  - "1q512s8k"
-  - "1q1ks8k"
-  - "1q2ks8k"
-  - "1q2ks16k"
-  - "1q4ks16k"
+  # Chunked prefill / extend
+  # Short context
+  - "q128s1k"
+  - "q256s2k"
+  - "q512s4k"
+  - "q1ks4k"
+  - "q2ks8k"
+  - "2q128s1k"
+  - "2q256s2k"
+  - "2q512s4k"
+  - "2q1ks4k"
+  - "2q2ks8k"
+  - "4q128s1k"
+  - "4q256s2k"
+  - "4q512s4k"
+  - "4q1ks4k"
+  - "4q2ks8k"
+  - "8q128s1k"
+  - "8q256s2k"
+  - "8q512s4k"
+  - "8q1ks4k"
 
-backends:
-  - FLASHMLA_SPARSE
-  - FLASHINFER_MLA_SPARSE
+  # Medium context
+  - "q128s16k"
+  - "q512s16k"
+  - "q1ks16k"
+  - "q2ks16k"
+  - "2q128s16k"
+  - "2q512s16k"
+  - "2q1ks16k"
+  - "2q2ks16k"
+  - "4q128s16k"
+  - "4q512s16k"
+  - "4q1ks16k"
+  - "4q2ks16k"
+
+  # Long context
+  - "q128s64k"
+  - "q512s64k"
+  - "q1ks64k"
+  - "q2ks64k"
+  - "2q128s64k"
+  - "2q512s64k"
+  - "2q1ks64k"
+  - "2q2ks64k"
+
+decode_backends:
+  - CUTLASS_MLA
+
+prefill_backends:
+  - fa2
+  - fa3
+  - fa4
+  - flashinfer
+  - cudnn
+  - trtllm
 
 device: "cuda:0"
-repeats: 10
-warmup_iters: 3
-profile_memory: true
+repeats: 20
+warmup_iters: 5

benchmarks/attention_benchmarks/configs/mla_sparse_prefill.yaml

@@ -0,0 +1,62 @@
+# MLA prefill-only benchmark configuration for sparse backends
+
+model:
+  name: "deepseek-v3"
+  num_layers: 60
+  num_q_heads: 128
+  num_kv_heads: 1
+  head_dim: 576
+  kv_lora_rank: 512
+  qk_nope_head_dim: 128
+  qk_rope_head_dim: 64
+  v_head_dim: 128
+  block_size: 128
+
+# Model parameter sweep: simulate tensor parallelism by varying num_q_heads
+# TP=1: 128 heads, TP=2: 64 heads, TP=4: 32 heads, TP=8: 16 heads
+model_parameter_sweep:
+  param_name: "num_q_heads"
+  values: [128, 64, 32, 16]
+  label_format: "{backend}_{value}h"
+
+batch_specs:
+  # Pure prefill
+  - "1q512"
+  - "1q1k"
+  - "1q2k"
+  - "1q4k"
+  - "1q8k"
+
+  # Batched pure prefill
+  - "2q512"
+  - "2q1k"
+  - "2q2k"
+  - "2q4k"
+  - "2q8k"
+  - "4q512"
+  - "4q1k"
+  - "4q2k"
+  - "4q4k"
+  - "4q8k"
+  - "8q512"
+  - "8q1k"
+  - "8q2k"
+  - "8q4k"
+  - "8q8k"
+
+  # Extend
+  - "1q512s4k"
+  - "1q512s8k"
+  - "1q1ks8k"
+  - "1q2ks8k"
+  - "1q2ks16k"
+  - "1q4ks16k"
+
+backends:
+  - FLASHMLA_SPARSE
+  - FLASHINFER_MLA_SPARSE
+
+device: "cuda:0"
+repeats: 10
+warmup_iters: 3
+profile_memory: true

benchmarks/attention_benchmarks/mla_runner.py

@@ -62,6 +62,7 @@ def create_minimal_vllm_config(
     max_num_seqs: int = 256,
     mla_dims: dict | None = None,
     index_topk: int | None = None,
+    prefill_backend: str | None = None,
 ) -> VllmConfig:
     """
     Create minimal VllmConfig for MLA benchmarks.
@@ -75,6 +76,9 @@ def create_minimal_vllm_config(
                   setup_mla_dims(model_name)
         index_topk: Optional topk value for sparse MLA backends. If provided,
                     the config will include index_topk for sparse attention.
+        prefill_backend: Prefill backend name (e.g., "fa3", "fa4", "flashinfer",
+                        "cudnn", "trtllm"). Configures the attention config to
+                        force the specified prefill backend.
 
     Returns:
         VllmConfig for benchmarking
@@ -145,7 +149,6 @@ def create_minimal_vllm_config(
     cache_config = CacheConfig(
         block_size=block_size,
         gpu_memory_utilization=0.9,
-        swap_space=0,
         cache_dtype="auto",
         enable_prefix_caching=False,
     )
@@ -164,7 +167,7 @@ def create_minimal_vllm_config(
 
     compilation_config = CompilationConfig()
 
-    return VllmConfig(
+    vllm_config = VllmConfig(
         model_config=model_config,
         cache_config=cache_config,
         parallel_config=parallel_config,
@@ -172,9 +175,84 @@ def create_minimal_vllm_config(
         compilation_config=compilation_config,
     )
 
+    if prefill_backend is not None:
+        prefill_cfg = get_prefill_backend_config(prefill_backend)
+        if prefill_cfg["flash_attn_version"] is not None:
+            vllm_config.attention_config.flash_attn_version = prefill_cfg[
+                "flash_attn_version"
+            ]
+        vllm_config.attention_config.disable_flashinfer_prefill = prefill_cfg[
+            "disable_flashinfer_prefill"
+        ]
+        vllm_config.attention_config.use_cudnn_prefill = prefill_cfg[
+            "use_cudnn_prefill"
+        ]
+        vllm_config.attention_config.use_trtllm_ragged_deepseek_prefill = prefill_cfg[
+            "use_trtllm_ragged_deepseek_prefill"
+        ]
+
+    return vllm_config
+
 
 # ============================================================================
-# Backend Configuration
+# Prefill Backend Configuration
+# ============================================================================
+
+# Maps prefill backend names to attention config overrides.
+# FA backends set flash_attn_version and disable non-FA paths.
+# Non-FA backends enable their specific path and disable others.
+_PREFILL_BACKEND_CONFIG: dict[str, dict] = {
+    "fa2": {
+        "flash_attn_version": 2,
+        "disable_flashinfer_prefill": True,
+        "use_cudnn_prefill": False,
+        "use_trtllm_ragged_deepseek_prefill": False,
+    },
+    "fa3": {
+        "flash_attn_version": 3,
+        "disable_flashinfer_prefill": True,
+        "use_cudnn_prefill": False,
+        "use_trtllm_ragged_deepseek_prefill": False,
+    },
+    "fa4": {
+        "flash_attn_version": 4,
+        "disable_flashinfer_prefill": True,
+        "use_cudnn_prefill": False,
+        "use_trtllm_ragged_deepseek_prefill": False,
+    },
+    "flashinfer": {
+        "flash_attn_version": None,
+        "disable_flashinfer_prefill": False,
+        "use_cudnn_prefill": False,
+        "use_trtllm_ragged_deepseek_prefill": False,
+    },
+    "cudnn": {
+        "flash_attn_version": None,
+        "disable_flashinfer_prefill": True,
+        "use_cudnn_prefill": True,
+        "use_trtllm_ragged_deepseek_prefill": False,
+    },
+    "trtllm": {
+        "flash_attn_version": None,
+        "disable_flashinfer_prefill": True,
+        "use_cudnn_prefill": False,
+        "use_trtllm_ragged_deepseek_prefill": True,
+    },
+}
+
+
+def get_prefill_backend_config(prefill_backend: str) -> dict:
+    """Get attention config overrides for a prefill backend."""
+    if prefill_backend not in _PREFILL_BACKEND_CONFIG:
+        raise ValueError(
+            f"Unknown prefill backend: {prefill_backend!r}. "
+            f"Available: {list(_PREFILL_BACKEND_CONFIG.keys())}"
+        )
+    return _PREFILL_BACKEND_CONFIG[prefill_backend]
+
+
+# ============================================================================
+# Decode Backend Configuration
 # ============================================================================
 
 
@@ -204,6 +282,7 @@ def _get_backend_config(backend: str) -> dict:
     Returns:
         Dict with backend configuration
     """
+    from vllm.v1.attention.backend import MultipleOf
     from vllm.v1.attention.backends.registry import AttentionBackendEnum
 
     try:
@@ -220,8 +299,8 @@ def _get_backend_config(backend: str) -> dict:
     block_sizes = backend_class.get_supported_kernel_block_sizes()
     # Use first supported block size (backends typically support one for MLA)
     block_size = block_sizes[0] if block_sizes else None
-    if hasattr(block_size, "value"):
-        # Handle MultipleOf enum
+    if isinstance(block_size, MultipleOf):
+        # No fixed block size; fall back to config value
         block_size = None
 
     # Check if sparse via class method if available
@@ -677,16 +756,11 @@ def _run_single_benchmark(
     if is_sparse and indexer is not None:
         indexer.fill_random_indices(total_q, max_kv_len)
 
-    # Determine which forward method to use
-    if is_sparse:
-        # Sparse backends use forward_mqa
+    # Determine which forward method to use based on metadata
+    if metadata.decode is not None:
         forward_fn = lambda: impl.forward_mqa(decode_inputs, kv_cache, metadata, layer)
-    elif metadata.decode is not None:
-        forward_fn = lambda: impl._forward_decode(
-            decode_inputs, kv_cache, metadata, layer
-        )
     elif metadata.prefill is not None:
-        forward_fn = lambda: impl._forward_prefill(
+        forward_fn = lambda: impl.forward_mha(
             prefill_inputs["q"],
             prefill_inputs["k_c_normed"],
             prefill_inputs["k_pe"],
@@ -733,6 +807,7 @@ def _run_mla_benchmark_batched(
     backend: str,
     configs_with_params: list[tuple],  # [(config, threshold, num_splits), ...]
     index_topk: int = 2048,
+    prefill_backend: str | None = None,
 ) -> list[BenchmarkResult]:
     """
     Unified batched MLA benchmark runner for all backends.
@@ -744,11 +819,13 @@ def _run_mla_benchmark_batched(
     to avoid setup/teardown overhead.
 
     Args:
-        backend: Backend name
+        backend: Backend name (decode backend used for impl construction)
         configs_with_params: List of (config, threshold, num_splits) tuples
             - threshold: reorder_batch_threshold (FlashAttn/FlashMLA only)
             - num_splits: num_kv_splits (CUTLASS only)
         index_topk: Topk value for sparse MLA backends (default 2048)
+        prefill_backend: Prefill backend name (e.g., "fa3", "fa4").
+            When set, forces the specified FlashAttention version for prefill.
 
     Returns:
         List of BenchmarkResult objects
@@ -758,7 +835,7 @@ def _run_mla_benchmark_batched(
 
     backend_cfg = _get_backend_config(backend)
     device = torch.device(configs_with_params[0][0].device)
-    torch.cuda.set_device(device)
+    torch.accelerator.set_device_index(device)
 
     # Determine block size
     config_block_size = configs_with_params[0][0].block_size
@@ -781,11 +858,25 @@ def _run_mla_benchmark_batched(
         block_size=block_size,
         mla_dims=mla_dims,  # Use custom dims from config or default
         index_topk=index_topk if is_sparse else None,
+        prefill_backend=prefill_backend,
     )
 
     results = []
 
     with set_current_vllm_config(vllm_config):
+        # Clear cached prefill backend detection functions so they re-evaluate
+        # with the current VllmConfig. These are @functools.cache decorated and
+        # would otherwise return stale results from a previous backend's config.
+        from vllm.model_executor.layers.attention.mla_attention import (
+            use_cudnn_prefill,
+            use_flashinfer_prefill,
+            use_trtllm_ragged_deepseek_prefill,
+        )
+
+        use_flashinfer_prefill.cache_clear()
+        use_cudnn_prefill.cache_clear()
+        use_trtllm_ragged_deepseek_prefill.cache_clear()
+
         # Create backend impl, layer, builder, and indexer (reused across benchmarks)
         impl, layer, builder_instance, indexer = _create_backend_impl(
             backend_cfg,
@@ -795,6 +886,38 @@ def _run_mla_benchmark_batched(
             index_topk=index_topk if is_sparse else None,
         )
 
+        # Verify the actual prefill backend matches what was requested
+        if prefill_backend is not None:
+            prefill_cfg = get_prefill_backend_config(prefill_backend)
+            fa_version = prefill_cfg["flash_attn_version"]
+
+            if fa_version is not None:
+                # FA backend: verify the impl's FA version
+                actual_fa_version = getattr(impl, "vllm_flash_attn_version", None)
+                if actual_fa_version != fa_version:
+                    raise RuntimeError(
+                        f"Prefill backend '{prefill_backend}' requested FA "
+                        f"version {fa_version}, but the impl is using FA "
+                        f"version {actual_fa_version}. Check "
+                        f"vllm/v1/attention/backends/fa_utils.py."
+                    )
+            else:
+                # Non-FA backend: verify the builder picked the right path
+                expected_flags = {
+                    "flashinfer": "_use_fi_prefill",
+                    "cudnn": "_use_cudnn_prefill",
+                    "trtllm": "_use_trtllm_ragged_prefill",
+                }
+                flag_name = expected_flags.get(prefill_backend)
+                if flag_name and not getattr(builder_instance, flag_name, False):
+                    raise RuntimeError(
+                        f"Prefill backend '{prefill_backend}' was requested "
+                        f"but the metadata builder did not enable it. This "
+                        f"usually means a dependency is missing (e.g., "
+                        f"flashinfer not installed) or the platform doesn't "
+                        f"support it."
+                    )
+
         # Run each benchmark with the shared impl
         for config, threshold, num_splits in configs_with_params:
             # Set threshold for this benchmark (FlashAttn/FlashMLA only)
@@ -845,6 +968,7 @@ def run_mla_benchmark(
     reorder_batch_threshold: int | None = None,
     num_kv_splits: int | None = None,
     index_topk: int = 2048,
+    prefill_backend: str | None = None,
 ) -> BenchmarkResult | list[BenchmarkResult]:
     """
     Unified MLA benchmark runner for all backends.
@@ -862,6 +986,8 @@ def run_mla_benchmark(
                                  (single config mode only)
         num_kv_splits: Number of KV splits for CUTLASS (single config mode only)
         index_topk: Topk value for sparse MLA backends (default 2048)
+        prefill_backend: Prefill backend name (e.g., "fa3", "fa4").
+            When set, forces the specified FlashAttention version for prefill.
 
     Returns:
         BenchmarkResult (single mode) or list of BenchmarkResult (batched mode)
@@ -885,7 +1011,9 @@ def run_mla_benchmark(
         return_single = True
 
     # Use unified batched execution
-    results = _run_mla_benchmark_batched(backend, configs_with_params, index_topk)
+    results = _run_mla_benchmark_batched(
+        backend, configs_with_params, index_topk, prefill_backend=prefill_backend
+    )
 
     # Return single result or list based on input
     return results[0] if return_single else results

benchmarks/attention_benchmarks/runner.py

@@ -141,7 +141,6 @@ def _create_vllm_config(
     cache_config = CacheConfig(
         block_size=config.block_size,
         cache_dtype="auto",
-        swap_space=0,
     )
     cache_config.num_gpu_blocks = max_num_blocks
     cache_config.num_cpu_blocks = 0
@@ -419,8 +418,8 @@ def _run_single_benchmark(
     mem_stats = {}
     if config.profile_memory:
         mem_stats = {
-            "allocated_mb": torch.cuda.memory_allocated(device) / 1024**2,
-            "reserved_mb": torch.cuda.memory_reserved(device) / 1024**2,
+            "allocated_mb": torch.accelerator.memory_allocated(device) / 1024**2,
+            "reserved_mb": torch.accelerator.memory_reserved(device) / 1024**2,
         }
 
     return times, mem_stats
@@ -444,7 +443,7 @@ def run_attention_benchmark(config: BenchmarkConfig) -> BenchmarkResult:
         BenchmarkResult with timing and memory statistics
     """
     device = torch.device(config.device)
-    torch.cuda.set_device(device)
+    torch.accelerator.set_device_index(device)
 
     backend_cfg = _get_backend_config(config.backend)
 

benchmarks/auto_tune/README.md

@@ -41,7 +41,7 @@ MODEL=meta-llama/Llama-3.3-70B-Instruct SYSTEM=TPU TP=8 DOWNLOAD_DIR='' INPUT_LE
 | --- | --- | --- |
 | `BASE` | **Required.** The absolute path to the parent directory of your vLLM repository directory. | `"$HOME"` |
 | `MODEL` | **Required.** The Hugging Face model identifier to be served by vllm. | `"meta-llama/Llama-3.1-8B-Instruct"` |
-| `SYSTEM`| **Required.** The hardware you are running on. Choices: `TPU` or `GPU`. (For other systems, it might not support saving profiles) | `"TPU"` |
+| `SYSTEM` | **Required.** The hardware you are running on. Choices: `TPU` or `GPU`. (For other systems, it might not support saving profiles) | `"TPU"` |
 | `TP` | **Required.** The tensor-parallelism size. | `1` |
 | `DOWNLOAD_DIR` | **Required.** Directory to download and load model weights from. | `""` (default download path) |
 | `INPUT_LEN` | **Required.** Request input length. | `4000` |

benchmarks/benchmark_topk_topp.py

@@ -95,13 +95,16 @@ def create_logits(
 def measure_memory() -> tuple[int, int]:
     """Return (allocated, reserved) memory in bytes."""
     torch.accelerator.synchronize()
-    return torch.cuda.memory_allocated(), torch.cuda.max_memory_allocated()
+    return (
+        torch.accelerator.memory_allocated(),
+        torch.accelerator.max_memory_allocated(),
+    )
 
 
 def reset_memory_stats():
     """Reset peak memory statistics."""
     reset_buffer_cache()
-    torch.cuda.reset_peak_memory_stats()
+    torch.accelerator.reset_peak_memory_stats()
     torch.accelerator.empty_cache()
     gc.collect()
 

benchmarks/kernels/bench_concat_mla_q.py

@@ -0,0 +1,98 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+
+import argparse
+
+import torch
+
+from vllm import _custom_ops as ops
+from vllm.triton_utils import triton
+
+# DeepSeek V3 dimensions
+NOPE_DIM = 512
+ROPE_DIM = 64
+NUM_HEADS = 128
+
+NUM_TOKENS = [8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192]
+
+
+def get_configs():
+    return NUM_TOKENS
+
+
+def make_inputs(num_tokens, dtype):
+    """Create inputs matching the real code path.
+
+    Args:
+        contiguous_nope: If False, simulate the transposed BMM output
+                         (non-contiguous nope with stride pattern from
+                         [N,B,L].transpose(0,1)).
+    """
+    # Simulate: bmm output [N, B, L].transpose(0, 1) -> [B, N, L]
+    raw = torch.randn(NUM_HEADS, num_tokens, NOPE_DIM, dtype=dtype, device="cuda")
+    ql_nope = raw.transpose(0, 1)
+
+    q_pe = torch.randn(num_tokens, NUM_HEADS, ROPE_DIM, dtype=dtype, device="cuda")
+    return ql_nope, q_pe
+
+
+# ---- Non-contiguous nope benchmark (real code path) ----
+@triton.testing.perf_report(
+    triton.testing.Benchmark(
+        x_names=["num_tokens"],
+        x_vals=get_configs(),
+        line_arg="provider",
+        line_vals=["torch_cat", "concat_mla_q"],
+        line_names=["torch.cat", "concat_mla_q (v8)"],
+        styles=[("blue", "--"), ("green", "-")],
+        ylabel="Latency (us)",
+        plot_name="concat_mla_q-transposed",
+        args={},
+    )
+)
+def bench_transposed(num_tokens, provider):
+    dtype = torch.bfloat16
+    ql_nope, q_pe = make_inputs(num_tokens, dtype)
+
+    q_out = torch.empty(
+        num_tokens, NUM_HEADS, NOPE_DIM + ROPE_DIM, dtype=dtype, device="cuda"
+    )
+
+    quantiles = [0.5, 0.2, 0.8]
+
+    if provider == "torch_cat":
+        ms, min_ms, max_ms = triton.testing.do_bench_cudagraph(
+            lambda: torch.cat((ql_nope, q_pe), dim=-1), quantiles=quantiles, rep=500
+        )
+    else:
+        ms, min_ms, max_ms = triton.testing.do_bench_cudagraph(
+            lambda: ops.concat_mla_q(ql_nope, q_pe, q_out), quantiles=quantiles, rep=500
+        )
+
+    return ms * 1000, max_ms * 1000, min_ms * 1000  # us
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description="Benchmark concat_mla_q vs torch.cat")
+    parser.add_argument(
+        "--save-path", type=str, default=None, help="Path to save benchmark results"
+    )
+    args = parser.parse_args()
+
+    print("\n" + "=" * 70)
+    print("CONCAT MLA Q KERNEL BENCHMARKS")
+    print("=" * 70)
+    print(f"Dimensions: nope={NOPE_DIM}, rope={ROPE_DIM}, heads={NUM_HEADS}")
+    print(
+        f"Per-head output: {NOPE_DIM + ROPE_DIM} bf16 = "
+        f"{(NOPE_DIM + ROPE_DIM) * 2} bytes"
+    )
+    print(f"num_tokens (decode=batch_size, prefill=chunk_size): {NUM_TOKENS}")
+    print("=" * 70)
+
+    print("\n--- Non-contiguous nope inputs (transposed BMM output) ---")
+    bench_transposed.run(print_data=True, save_path=args.save_path)
+
+    print("\n" + "=" * 70)
+    print("Benchmarking complete!")
+    print("=" * 70)

benchmarks/kernels/bench_cp_gather_fp8.py

@@ -0,0 +1,153 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+import argparse
+import math
+
+import torch
+
+from vllm import _custom_ops as ops
+from vllm.triton_utils import triton
+
+# DeepSeek V3 MLA dimensions
+NOPE_DIM = 512
+ROPE_DIM = 64
+HEAD_DIM = NOPE_DIM + ROPE_DIM  # 576 BF16 output elements per token
+ENTRY_BYTES = 656  # 512 FP8 + 16 scales + 128 BF16 RoPE
+BLOCK_SIZE = 64  # tokens per physical cache block - get_supported_kernel_block_sizes
+
+# Realistic prefill scenarios:
+#   - 1 long prefill: single request, 16K-96K tokens
+#   - 4 medium prefills: 4 requests, 4K-24K tokens each
+#   - 16 shorter prefills: 16 requests, 1K-6K tokens each
+SCENARIOS = [
+    # (label, num_reqs, total_tokens_list)
+    ("1-req", 1, [8192, 16384, 32768, 65536, 98304]),
+    ("4-reqs", 4, [8192, 16384, 32768, 65536, 98304]),
+    ("16-reqs", 16, [8192, 16384, 32768, 65536, 98304]),
+]
+
+
+def make_inputs(total_tokens, num_reqs, block_size):
+    """Create synthetic FP8 cache, block table, and output buffer.
+
+    Fills the cache with random bytes (we only measure throughput,
+    not correctness). Block table maps each request to contiguous
+    physical blocks.
+    """
+    # Divide tokens evenly across requests
+    base_len = total_tokens // num_reqs
+    remainder = total_tokens % num_reqs
+    seq_lens = [base_len + (1 if r < remainder else 0) for r in range(num_reqs)]
+
+    # workspace_starts: cumulative sum of seq_lens
+    workspace_starts = [0] * num_reqs
+    for r in range(1, num_reqs):
+        workspace_starts[r] = workspace_starts[r - 1] + seq_lens[r - 1]
+
+    # Physical blocks needed per request
+    blocks_per_req = [math.ceil(s / block_size) for s in seq_lens]
+    total_blocks = sum(blocks_per_req)
+    max_blocks = max(blocks_per_req)
+
+    # Allocate cache with random data (content doesn't matter for perf)
+    cache = torch.randint(
+        0,
+        256,
+        (total_blocks, block_size, ENTRY_BYTES),
+        dtype=torch.uint8,
+        device="cuda",
+    )
+
+    # Block table: contiguous block assignments
+    block_table = torch.zeros(num_reqs, max_blocks, dtype=torch.int32, device="cuda")
+    block_idx = 0
+    for r in range(num_reqs):
+        for b in range(blocks_per_req[r]):
+            block_table[r, b] = block_idx
+            block_idx += 1
+
+    # Output workspace
+    dst = torch.zeros(total_tokens, HEAD_DIM, dtype=torch.bfloat16, device="cuda")
+
+    seq_lens_t = torch.tensor(seq_lens, dtype=torch.int32, device="cuda")
+    workspace_starts_t = torch.tensor(
+        workspace_starts, dtype=torch.int32, device="cuda"
+    )
+
+    return cache, dst, block_table, seq_lens_t, workspace_starts_t
+
+
+def bench_scenario(label, num_reqs, total_tokens_list, save_path):
+    """Run benchmark for a specific (num_reqs, total_tokens) scenario."""
+
+    @triton.testing.perf_report(
+        triton.testing.Benchmark(
+            x_names=["total_tokens"],
+            x_vals=total_tokens_list,
+            line_arg="provider",
+            line_vals=["cuda_kernel"],
+            line_names=["cp_gather_fp8 (CUDA)"],
+            styles=[("green", "-")],
+            ylabel="Latency (us)",
+            plot_name=f"cp_gather_fp8-{label}-bs{BLOCK_SIZE}",
+            args={"num_reqs": num_reqs},
+        )
+    )
+    def bench_fn(total_tokens, provider, num_reqs):
+        cache, dst, block_table, seq_lens_t, ws_starts = make_inputs(
+            total_tokens, num_reqs, BLOCK_SIZE
+        )
+
+        quantiles = [0.5, 0.2, 0.8]
+
+        ms, min_ms, max_ms = triton.testing.do_bench_cudagraph(
+            lambda: ops.cp_gather_and_upconvert_fp8_kv_cache(
+                cache, dst, block_table, seq_lens_t, ws_starts, num_reqs
+            ),
+            quantiles=quantiles,
+            rep=500,
+        )
+
+        return ms * 1000, max_ms * 1000, min_ms * 1000  # us
+
+    seq_len_per_req = total_tokens_list[0] // num_reqs
+    seq_len_per_req_max = total_tokens_list[-1] // num_reqs
+    print(
+        f"\n--- {label}: {num_reqs} request(s), "
+        f"~{seq_len_per_req}-{seq_len_per_req_max} tokens/req ---"
+    )
+    bench_fn.run(print_data=True, save_path=save_path)
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(
+        description="Benchmark cp_gather_and_upconvert_fp8_kv_cache"
+    )
+    parser.add_argument(
+        "--save-path",
+        type=str,
+        default=None,
+        help="Path to save benchmark results as CSV",
+    )
+    args = parser.parse_args()
+
+    # Print data volume info for bandwidth analysis
+    read_per_token = ENTRY_BYTES  # 656 bytes from cache
+    write_per_token = HEAD_DIM * 2  # 576 * 2 = 1152 bytes to workspace
+    total_per_token = read_per_token + write_per_token  # 1808 bytes
+
+    print("\n" + "=" * 70)
+    print("CP_GATHER_AND_UPCONVERT_FP8_KV_CACHE BENCHMARKS")
+    print("=" * 70)
+    print(f"Cache entry: {ENTRY_BYTES} bytes (512 FP8 + 16 scales + 128 RoPE)")
+    print(f"Output row:  {HEAD_DIM} BF16 = {HEAD_DIM * 2} bytes")
+    print(f"Per token:   {total_per_token} bytes (read + write)")
+    print(f"Block size:  {BLOCK_SIZE} tokens/block")
+    print("=" * 70)
+
+    for label, num_reqs, total_tokens_list in SCENARIOS:
+        bench_scenario(label, num_reqs, total_tokens_list, args.save_path)
+
+    print("\n" + "=" * 70)
+    print("Benchmarking complete!")
+    print("=" * 70)

benchmarks/kernels/benchmark_cutlass_moe_fp8.py

@@ -64,7 +64,7 @@ def bench_run(
     per_out_ch: bool,
     mkn: tuple[int, int, int],
 ):
-    init_workspace_manager(torch.cuda.current_device())
+    init_workspace_manager(torch.accelerator.current_device_index())
     (m, k, n) = mkn
 
     dtype = torch.half

benchmarks/kernels/benchmark_device_communicators.py

@@ -495,7 +495,7 @@ def main():
 
     # Set device
     device = torch.device(f"cuda:{rank}")
-    torch.cuda.set_device(device)
+    torch.accelerator.set_device_index(device)
 
     # Get CPU process group
     cpu_group = dist.new_group(backend="gloo")

benchmarks/kernels/benchmark_fused_collective.py

@@ -392,7 +392,7 @@ def benchmark_operation(
     num_op_per_cudagraph = 10
 
     # Use vLLM's graph_capture to make tensor_model_parallel_all_reduce graph-safe
-    device = torch.device(f"cuda:{torch.cuda.current_device()}")
+    device = torch.device(f"cuda:{torch.accelerator.current_device_index()}")
     with graph_capture(device=device), torch.cuda.graph(graph):
         for _ in range(num_op_per_cudagraph):
             operation_func(*args, **kwargs)
@@ -984,7 +984,7 @@ def main():
     world_size = int(os.environ["WORLD_SIZE"])
 
     device = torch.device(f"cuda:{rank}")
-    torch.cuda.set_device(device)
+    torch.accelerator.set_device_index(device)
     torch.set_default_device(device)
 
     init_distributed_environment()

benchmarks/kernels/benchmark_grouped_gemm_cutlass.py

@@ -50,7 +50,7 @@ def bench_run(
     per_out_ch: bool,
     mkn: tuple[int, int, int],
 ):
-    init_workspace_manager(torch.cuda.current_device())
+    init_workspace_manager(torch.accelerator.current_device_index())
     label = "Quant Matmul"
 
     sub_label = (

benchmarks/kernels/benchmark_moe.py

@@ -626,7 +626,11 @@ class BenchmarkWorker:
             if visible_device != f"{self.device_id}":
                 need_device_guard = True
 
-        with torch.cuda.device(self.device_id) if need_device_guard else nullcontext():
+        with (
+            torch.accelerator.device_index(self.device_id)
+            if need_device_guard
+            else nullcontext()
+        ):
             for idx, config in enumerate(tqdm(search_space)):
                 try:
                     kernel_time = benchmark_config(

benchmarks/kernels/benchmark_w8a8_block_fp8.py

@@ -285,7 +285,7 @@ def tune_on_gpu(args_dict):
     weight_shapes = args_dict["weight_shapes"]
     args = args_dict["args"]
 
-    torch.cuda.set_device(gpu_id)
+    torch.accelerator.set_device_index(gpu_id)
     print(f"Starting tuning on GPU {gpu_id} with batch sizes {batch_sizes}")
 
     block_n = args.block_n
@@ -334,7 +334,7 @@ def distribute_batch_sizes(batch_sizes, num_gpus):
 
 def main(args):
     print(args)
-    num_gpus = torch.cuda.device_count()
+    num_gpus = torch.accelerator.device_count()
     if num_gpus == 0:
         raise RuntimeError("No GPU available for tuning")
     print(f"Found {num_gpus} GPUs for parallel tuning")

cmake/cpu_extension.cmake

@@ -79,7 +79,8 @@ else()
     find_isa(${CPUINFO} "asimd" ASIMD_FOUND) # Check for ARM NEON support
     find_isa(${CPUINFO} "bf16" ARM_BF16_FOUND) # Check for ARM BF16 support
     find_isa(${CPUINFO} "S390" S390_FOUND)
-    find_isa(${CPUINFO} "v" RVV_FOUND) # Check for RISC-V RVV support
+    find_isa(${CPUINFO} "zvfhmin" RVV_FP16_FOUND) # Check for RISC-V Vector FP16 support
+    find_isa(${CPUINFO} "zvfbfmin" RVV_BF16_FOUND) # Check for RISC-V Vector BF16 support
 
     # Support cross-compilation by allowing override via environment variables
     if (ENABLE_ARM_BF16)
@@ -101,11 +102,13 @@ if (CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64|amd64" OR ENABLE_X86_ISA)
         "-mavx512f"
         "-mavx512vl"
         "-mavx512bw"
-        "-mavx512dq"
-        "-mavx512bf16"
-        "-mavx512vnni"
+        "-mavx512dq")
+    list(APPEND CXX_COMPILE_FLAGS_AVX512_AMX 
+        ${CXX_COMPILE_FLAGS_AVX512}
         "-mamx-bf16"
-        "-mamx-tile")
+        "-mamx-tile"
+        "-mavx512bf16"
+        "-mavx512vnni")
     list(APPEND CXX_COMPILE_FLAGS_AVX2
         "-mavx2")
 elseif (POWER9_FOUND OR POWER10_FOUND OR POWER11_FOUND)
@@ -142,11 +145,19 @@ elseif (S390_FOUND)
         "-march=native"
         "-mtune=native")
 elseif (CMAKE_SYSTEM_PROCESSOR MATCHES "riscv64")
-    if(RVV_FOUND)
-	    message(FAIL_ERROR "Can't support rvv now.")
+    message(STATUS "RISC-V detected")
+    if(RVV_BF16_FOUND)
+        message(STATUS "BF16 extension detected")
+        set(MARCH_FLAGS -march=rv64gcv_zvfh_zfbfmin_zvfbfmin_zvl128b -mrvv-vector-bits=zvl -mabi=lp64d)
+        add_compile_definitions(RISCV_BF16_SUPPORT)
+    elseif (RVV_FP16_FOUND)
+        message(WARNING "BF16 functionality is not available")
+        set(MARCH_FLAGS -march=rv64gcv_zvfh_zvl128b -mrvv-vector-bits=zvl -mabi=lp64d)
     else()
+        message(STATUS "compile riscv with scalar")
         list(APPEND CXX_COMPILE_FLAGS "-march=rv64gc")
     endif()
+    list(APPEND CXX_COMPILE_FLAGS ${MARCH_FLAGS})
 else()
     message(FATAL_ERROR "vLLM CPU backend requires X86, Power9+ ISA, S390X ISA, ARMv8 or RISC-V support.")
 endif()
@@ -305,7 +316,8 @@ endif()
 
 # TODO: Refactor this
 if (ENABLE_X86_ISA)
-    message(STATUS "CPU extension (AVX512) compile flags: ${CXX_COMPILE_FLAGS_AVX512}")
+    message(STATUS "CPU extension (AVX512F + BF16 + VNNI + AMX) compile flags: ${CXX_COMPILE_FLAGS_AVX512_AMX}")
+    message(STATUS "CPU extension (AVX512F) compile flags: ${CXX_COMPILE_FLAGS_AVX512}")
     message(STATUS "CPU extension (AVX2) compile flags: ${CXX_COMPILE_FLAGS_AVX2}")
 else()
     message(STATUS "CPU extension compile flags: ${CXX_COMPILE_FLAGS}")
@@ -357,13 +369,15 @@ if(USE_ONEDNN)
 endif()
 
 if (ENABLE_X86_ISA)
-    set(VLLM_EXT_SRC_AVX512
+    set(VLLM_EXT_SRC_SGL
         "csrc/cpu/sgl-kernels/gemm.cpp"
         "csrc/cpu/sgl-kernels/gemm_int8.cpp"
         "csrc/cpu/sgl-kernels/gemm_fp8.cpp"
         "csrc/cpu/sgl-kernels/moe.cpp"
         "csrc/cpu/sgl-kernels/moe_int8.cpp"
-        "csrc/cpu/sgl-kernels/moe_fp8.cpp"
+        "csrc/cpu/sgl-kernels/moe_fp8.cpp")
+
+    set(VLLM_EXT_SRC_AVX512
         "csrc/cpu/shm.cpp"
         "csrc/cpu/cpu_wna16.cpp"
         "csrc/cpu/cpu_fused_moe.cpp"
@@ -389,31 +403,48 @@ if (ENABLE_X86_ISA)
         "csrc/cpu/pos_encoding.cpp"
         "csrc/moe/dynamic_4bit_int_moe_cpu.cpp") 
 
-    message(STATUS "CPU extension (AVX512) source files: ${VLLM_EXT_SRC_AVX512}")
+    message(STATUS "CPU extension (AVX512F + BF16 + VNNI + AMX) source files: ${VLLM_EXT_SRC_AVX512} ${VLLM_EXT_SRC_SGL}")
+    message(STATUS "CPU extension (AVX512F) source files: ${VLLM_EXT_SRC_AVX512}")
     message(STATUS "CPU extension (AVX2) source files: ${VLLM_EXT_SRC_AVX2}")
 
+    set(_C_LIBS numa dnnl_ext)
+    set(_C_AVX512_LIBS numa dnnl_ext)
+    set(_C_AVX2_LIBS numa)
+
+    # AMX + AVX512F + AVX512BF16 + AVX512VNNI
     define_extension_target(
         _C
         DESTINATION vllm
         LANGUAGE CXX
+        SOURCES ${VLLM_EXT_SRC_AVX512} ${VLLM_EXT_SRC_SGL}
+        LIBRARIES ${_C_LIBS}
+        COMPILE_FLAGS ${CXX_COMPILE_FLAGS_AVX512_AMX}
+        USE_SABI 3
+        WITH_SOABI
+    )
+
+    # For AMX kernels
+    target_compile_definitions(_C PRIVATE "-DCPU_CAPABILITY_AMXBF16")
+
+    # AVX512F 
+    define_extension_target(
+        _C_AVX512
+        DESTINATION vllm
+        LANGUAGE CXX
         SOURCES ${VLLM_EXT_SRC_AVX512}
-        LIBRARIES ${LIBS}
+        LIBRARIES ${_C_AVX512_LIBS}
         COMPILE_FLAGS ${CXX_COMPILE_FLAGS_AVX512}
         USE_SABI 3
         WITH_SOABI
     )
 
-    # For SGL kernels
-    target_compile_definitions(_C PRIVATE "-DCPU_CAPABILITY_AVX512")
-    # For AMX kernels
-    target_compile_definitions(_C PRIVATE "-DCPU_CAPABILITY_AMXBF16")
-
+    # AVX2 
     define_extension_target(
         _C_AVX2
         DESTINATION vllm
         LANGUAGE CXX
         SOURCES ${VLLM_EXT_SRC_AVX2}
-        LIBRARIES ${LIBS}
+        LIBRARIES ${_C_AVX2_LIBS}
         COMPILE_FLAGS ${CXX_COMPILE_FLAGS_AVX2}
         USE_SABI 3
         WITH_SOABI

cmake/external_projects/vllm_flash_attn.cmake

@@ -39,7 +39,7 @@ else()
   FetchContent_Declare(
           vllm-flash-attn
           GIT_REPOSITORY https://github.com/vllm-project/flash-attention.git
-          GIT_TAG 140c00c0241bb60cc6e44e7c1be9998d4b20d8d2
+          GIT_TAG 1488682bb545f7d020e958a33116b1419d1cfc83
           GIT_PROGRESS TRUE
           # Don't share the vllm-flash-attn build between build types
           BINARY_DIR ${CMAKE_BINARY_DIR}/vllm-flash-attn

csrc/cache.h

@@ -74,6 +74,12 @@ void indexer_k_quant_and_cache(
     int64_t quant_block_size,     // quantization block size
     const std::string& scale_fmt);
 
+// Concatenate query nope and rope for MLA/DSA attention
+void concat_mla_q(
+    torch::Tensor& ql_nope,  // [num_tokens, num_heads, nope_dim]
+    torch::Tensor& q_pe,     // [num_tokens, num_heads, rope_dim]
+    torch::Tensor& q_out);   // [num_tokens, num_heads, nope_dim + rope_dim]
+
 // Extract function to gather quantized K cache
 void cp_gather_indexer_k_quant_cache(
     const torch::Tensor& kv_cache,  // [num_blocks, block_size, cache_stride]

csrc/cache_kernels.cu

@@ -8,6 +8,7 @@
 #include "cuda_compat.h"
 #include "dispatch_utils.h"
 #include "quantization/vectorization_utils.cuh"
+#include "concat_mla_q.cuh"
 
 #ifdef USE_ROCM
   #include "quantization/w8a8/fp8/amd/quant_utils.cuh"
@@ -918,8 +919,8 @@ __global__ void gather_and_maybe_dequant_cache(
 // SCALAR_T is the data type of the destination tensor.
 // CACHE_T is the stored data type of kv-cache.
 // KV_DTYPE is the real data type of kv-cache.
-#define CALL_GATHER_CACHE(SCALAR_T, CACHE_T, KV_DTYPE)                        \
-  vllm::gather_and_maybe_dequant_cache<SCALAR_T, CACHE_T, KV_DTYPE, 576,      \
+#define CALL_GATHER_CACHE(SCALAR_T, CACHE_T, KV_DTYPE, ENTRY_SZ)              \
+  vllm::gather_and_maybe_dequant_cache<SCALAR_T, CACHE_T, KV_DTYPE, ENTRY_SZ, \
                                        thread_block_size>                     \
       <<<grid, block, 0, stream>>>(                                           \
           reinterpret_cast<CACHE_T*>(src_cache.data_ptr()),                   \
@@ -930,6 +931,12 @@ __global__ void gather_and_maybe_dequant_cache(
           dst_entry_stride, reinterpret_cast<const float*>(scale.data_ptr()), \
           seq_starts_ptr);
 
+#define CALL_GATHER_CACHE_576(SCALAR_T, CACHE_T, KV_DTYPE) \
+  CALL_GATHER_CACHE(SCALAR_T, CACHE_T, KV_DTYPE, 576)
+
+#define CALL_GATHER_CACHE_320(SCALAR_T, CACHE_T, KV_DTYPE) \
+  CALL_GATHER_CACHE(SCALAR_T, CACHE_T, KV_DTYPE, 320)
+
 // Gather sequences from the cache into the destination tensor.
 //  - cu_seq_lens contains the cumulative sequence lengths for each batch
 //  - block_table contains the cache block indices for each sequence
@@ -959,9 +966,10 @@ void gather_and_maybe_dequant_cache(
     TORCH_CHECK(seq_starts.value().dtype() == torch::kInt32,
                 "seq_starts must be int32");
   }
-  TORCH_CHECK(head_dim == 576,
-              "gather_and_maybe_dequant_cache only support the head_dim to 576 "
-              "for better performance")
+  TORCH_CHECK(
+      head_dim == 320 || head_dim == 576,
+      "gather_and_maybe_dequant_cache only support the head_dim to 320 or 576 "
+      "for better performance")
 
   TORCH_CHECK(src_cache.device() == dst.device(),
               "src_cache and dst must be on the same device");
@@ -986,7 +994,13 @@ void gather_and_maybe_dequant_cache(
   const int32_t* seq_starts_ptr =
       seq_starts.has_value() ? seq_starts.value().data_ptr<int32_t>() : nullptr;
 
-  DISPATCH_BY_KV_CACHE_DTYPE(dst.dtype(), kv_cache_dtype, CALL_GATHER_CACHE);
+  if (head_dim == 576) {
+    DISPATCH_BY_KV_CACHE_DTYPE(dst.dtype(), kv_cache_dtype,
+                               CALL_GATHER_CACHE_576);
+  } else {
+    DISPATCH_BY_KV_CACHE_DTYPE(dst.dtype(), kv_cache_dtype,
+                               CALL_GATHER_CACHE_320);
+  }
 }
 
 namespace vllm {
@@ -995,75 +1009,67 @@ namespace vllm {
 // Similar to cp_gather_cache but specifically for FP8->BF16 conversion
 __global__ void cp_gather_and_upconvert_fp8_kv_cache(
     const uint8_t* __restrict__ src_cache,    // [NUM_BLOCKS, BLOCK_SIZE, 656]
-    __nv_bfloat16* __restrict__ dst,          // [TOT_TOKENS, 576]
-    const int32_t* __restrict__ block_table,  // [BATCH, BLOCK_INDICES]
-    const int32_t* __restrict__ seq_lens,     // [BATCH]
-    const int32_t* __restrict__ workspace_starts,  // [BATCH]
-    const int32_t block_size, const int32_t head_dim,
-    const int64_t block_table_stride, const int64_t cache_block_stride,
-    const int64_t cache_entry_stride, const int64_t dst_entry_stride) {
-  const int64_t bid = blockIdx.x;  // Batch ID
-  const int32_t num_splits = gridDim.y;
-  const int32_t split = blockIdx.y;
-  const int32_t seq_start = workspace_starts[bid];
-  const int32_t seq_len = seq_lens[bid];
-  const int32_t tot_slots = seq_len;
-  const int32_t split_slots = cuda_utils::ceil_div(tot_slots, num_splits);
+    __nv_bfloat16* __restrict__ dst,          // [total_tokens, 576]
+    const int32_t* __restrict__ block_table,  // [num_reqs, BLOCK_INDICES]
+    const int32_t* __restrict__ workspace_starts,  // [num_reqs]
+    const int32_t num_reqs, const int32_t block_size,
+    const int32_t total_tokens, const int64_t block_table_stride,
+    const int64_t cache_block_stride, const int64_t cache_entry_stride,
+    const int64_t dst_entry_stride) {
+  const int flat_warp_id = (blockIdx.x * blockDim.x + threadIdx.x) >> 5;
+  if (flat_warp_id >= total_tokens) return;
+  const int lane_id = threadIdx.x & 31;
 
-  const int32_t split_start = split * split_slots;
-  const int32_t split_end = min((split + 1) * split_slots, tot_slots);
-
-  const bool is_active_split = (split_start < tot_slots);
-
-  if (!is_active_split) return;
-
-  // Adjust the pointer for the block_table for this batch
-  const int32_t batch_offset = bid * block_table_stride;
-  int32_t offset = split_start;
-  int32_t offset_div = offset / block_size;
-  offset = offset % block_size;
-  const int32_t* batch_block_table = block_table + batch_offset;
-
-  // Adjust dst pointer based on the cumulative sequence lengths
-  dst += seq_start * dst_entry_stride;
-
-  const int tid = threadIdx.x;
-
-  // Process each token in this split
-  for (int pid = split_start; pid < split_end; ++pid) {
-    auto block_id = batch_block_table[offset_div];
-    const uint8_t* token_ptr =
-        src_cache + block_id * cache_block_stride + offset * cache_entry_stride;
-    __nv_bfloat16* dst_ptr = dst + pid * dst_entry_stride;
-
-    // FP8 format: 512 bytes fp8 + 16 bytes scales + 128 bytes rope (64 bf16)
-    const uint8_t* no_pe_ptr = token_ptr;
-    const float* scales_ptr = reinterpret_cast<const float*>(token_ptr + 512);
-    const __nv_bfloat16* rope_ptr =
-        reinterpret_cast<const __nv_bfloat16*>(token_ptr + 512 + 16);
-
-    // Parallelize fp8 dequant (512 elements) and rope copy (64 elements)
-    if (tid < 512) {
-      // FP8 dequantization
-      const int tile = tid >> 7;  // each tile is 128 elements
-      const float scale = scales_ptr[tile];
-      const uint8_t val = no_pe_ptr[tid];
-      dst_ptr[tid] =
-          fp8::scaled_convert<__nv_bfloat16, uint8_t,
-                              vllm::Fp8KVCacheDataType::kFp8E4M3>(val, scale);
-    } else if (tid < 576) {
-      // Rope copy (64 bf16 elements)
-      const int rope_idx = tid - 512;
-      dst_ptr[512 + rope_idx] = rope_ptr[rope_idx];
-    }
-
-    // Move to next token
-    offset += 1;
-    if (offset == block_size) {
-      offset_div += 1;
-      offset = 0;
-    }
+  // Binary search to find which request owns this output token
+  int lo = 0, hi = num_reqs - 1;
+  while (lo < hi) {
+    int mid = (lo + hi + 1) >> 1;
+    if (workspace_starts[mid] <= flat_warp_id)
+      lo = mid;
+    else
+      hi = mid - 1;
   }
+  const int req_id = lo;
+
+  // Compute physical token address via block table
+  const int out_token_id = flat_warp_id;
+  const int token_offset = out_token_id - workspace_starts[req_id];
+  const int cache_block_idx = token_offset / block_size;
+  const int offset_in_block = token_offset % block_size;
+  const int physical_block =
+      block_table[req_id * block_table_stride + cache_block_idx];
+
+  const uint8_t* token_ptr = src_cache + physical_block * cache_block_stride +
+                             offset_in_block * cache_entry_stride;
+
+  const int4* nope_src = reinterpret_cast<const int4*>(token_ptr);
+  const int4 fp8_data = nope_src[lane_id];
+
+  const float* scales_ptr = reinterpret_cast<const float*>(token_ptr + 512);
+  const float scale = scales_ptr[lane_id >> 3];
+
+  const uint2 fp8_lo = make_uint2(fp8_data.x, fp8_data.y);
+  const uint2 fp8_hi = make_uint2(fp8_data.z, fp8_data.w);
+#ifdef USE_ROCM
+  const bf16_8_t bf16_lo =
+      fp8::scaled_vec_conversion<bf16_8_t, uint2>(fp8_lo, scale);
+  const bf16_8_t bf16_hi =
+      fp8::scaled_vec_conversion<bf16_8_t, uint2>(fp8_hi, scale);
+#else
+  const bf16_8_t bf16_lo =
+      fp8::scaled_vec_conversion<bf16_8_t, uint2>(fp8_lo, scale, __NV_E4M3);
+  const bf16_8_t bf16_hi =
+      fp8::scaled_vec_conversion<bf16_8_t, uint2>(fp8_hi, scale, __NV_E4M3);
+#endif
+
+  __nv_bfloat16* dst_ptr = dst + out_token_id * dst_entry_stride;
+  int4* nope_dst = reinterpret_cast<int4*>(dst_ptr) + lane_id * 2;
+  nope_dst[0] = *reinterpret_cast<const int4*>(&bf16_lo);
+  nope_dst[1] = *reinterpret_cast<const int4*>(&bf16_hi);
+
+  const int* rope_src = reinterpret_cast<const int*>(token_ptr + 528);
+  int* rope_dst = reinterpret_cast<int*>(dst_ptr + 512);
+  rope_dst[lane_id] = rope_src[lane_id];
 }
 
 template <typename scalar_t>
@@ -1257,15 +1263,16 @@ void cp_gather_and_upconvert_fp8_kv_cache(
     src_ptr = reinterpret_cast<const uint8_t*>(src_cache.data_ptr());
   }
 
-  // Decide on the number of splits based on the batch size
-  int num_splits = batch_size > 128 ? 2 : batch_size > 64 ? 4 : 16;
-  dim3 grid(batch_size, num_splits);
-  dim3 block(576);
+  const int total_tokens = dst.size(0);
+  constexpr int warps_per_block = 8;
+  const int grid_size = (total_tokens + warps_per_block - 1) / warps_per_block;
+  const int block_size_threads = warps_per_block * 32;  // 256 threads
 
-  vllm::cp_gather_and_upconvert_fp8_kv_cache<<<grid, block, 0, stream>>>(
+  vllm::cp_gather_and_upconvert_fp8_kv_cache<<<grid_size, block_size_threads, 0,
+                                               stream>>>(
       src_ptr, reinterpret_cast<__nv_bfloat16*>(dst.data_ptr()),
-      block_table.data_ptr<int32_t>(), seq_lens.data_ptr<int32_t>(),
-      workspace_starts.data_ptr<int32_t>(), block_size, head_dim,
+      block_table.data_ptr<int32_t>(), workspace_starts.data_ptr<int32_t>(),
+      static_cast<int32_t>(batch_size), block_size, total_tokens,
       block_table_stride, cache_block_stride, cache_entry_stride,
       dst_entry_stride);
 }
@@ -1365,3 +1372,43 @@ void cp_gather_indexer_k_quant_cache(
     CALL_CP_GATHER_INDEXER_K_QUANT_CACHE(32);
   }
 }
+
+// Concatenate ql_nope and q_pe into a contiguous q_out tensor for MLA/DSA.
+// Replaces torch.cat((ql_nope, q_pe), dim=-1).
+void concat_mla_q(torch::Tensor& ql_nope,  // [num_tokens, num_heads, nope_dim]
+                  torch::Tensor& q_pe,     // [num_tokens, num_heads, rope_dim]
+                  torch::Tensor& q_out     // [num_tokens, num_heads, nope_dim +
+                                           // rope_dim]
+) {
+  const int num_tokens = ql_nope.size(0);
+  const int num_heads = ql_nope.size(1);
+  const int nope_dim = ql_nope.size(2);
+  const int rope_dim = q_pe.size(2);
+
+  TORCH_CHECK(nope_dim % 512 == 0, "nope_dim must be a multiple of 512, got ",
+              nope_dim);
+  TORCH_CHECK(rope_dim == 64, "rope_dim must be 64, got ", rope_dim);
+  TORCH_CHECK(q_out.size(2) == nope_dim + rope_dim);
+
+  TORCH_CHECK(ql_nope.stride(2) == 1, "ql_nope must have stride 1 in dim 2");
+  TORCH_CHECK(q_pe.stride(2) == 1, "q_pe must have stride 1 in dim 2");
+  TORCH_CHECK(q_out.stride(2) == 1, "q_out must have stride 1 in dim 2");
+
+  if (num_tokens == 0) return;
+
+  constexpr int warps_per_block = 8;
+  const int total_warps = num_tokens * num_heads;
+  const int grid_size = (total_warps + warps_per_block - 1) / warps_per_block;
+  const int block_size = warps_per_block * 32;
+
+  const at::cuda::OptionalCUDAGuard device_guard(device_of(ql_nope));
+  const cudaStream_t stream = at::cuda::getCurrentCUDAStream();
+
+  VLLM_DISPATCH_FLOATING_TYPES(ql_nope.scalar_type(), "concat_mla_q", [&] {
+    vllm::ConcatMLAQKernel<scalar_t, 512><<<grid_size, block_size, 0, stream>>>(
+        q_out.data_ptr<scalar_t>(), ql_nope.data_ptr<scalar_t>(),
+        q_pe.data_ptr<scalar_t>(), num_tokens, num_heads, q_out.stride(0),
+        q_out.stride(1), ql_nope.stride(0), ql_nope.stride(1), q_pe.stride(0),
+        q_pe.stride(1));
+  });
+}

csrc/concat_mla_q.cuh

@@ -0,0 +1,60 @@
+#ifndef CONCAT_MLA_Q_CUH_
+#define CONCAT_MLA_Q_CUH_
+
+#include <cuda_bf16.h>
+#include <cuda_fp16.h>
+
+#include "cuda_vec_utils.cuh"
+
+namespace vllm {
+
+// Concatenates ql_nope [num_tokens, num_heads, NOPE_DIM] and
+// q_pe [num_tokens, num_heads, 64]
+// into q_out [num_tokens, num_heads, NOPE_DIM+64].
+// Currently instantiated only for NOPE_DIM=512.
+// Rope dim is hardcoded to 64 (DeepSeek V3.2 MLA)
+template <typename DType, int NOPE_DIM>
+__global__ void ConcatMLAQKernel(
+    DType* __restrict__ q_out, const DType* __restrict__ ql_nope,
+    const DType* __restrict__ q_pe, const int num_tokens, const int num_heads,
+    const int64_t out_stride_0, const int64_t out_stride_1,
+    const int64_t nope_stride_0, const int64_t nope_stride_1,
+    const int64_t pe_stride_0, const int64_t pe_stride_1) {
+  const int flat_warp_id = (blockIdx.x * blockDim.x + threadIdx.x) >> 5;
+  if (flat_warp_id >= num_tokens * num_heads) return;
+
+  const int token_id = flat_warp_id / num_heads;
+  const int head_id = flat_warp_id % num_heads;
+  const int lane_id = threadIdx.x & 31;
+
+  constexpr bool use_256b = VLLM_256B_PTX_ENABLED;
+  constexpr int nope_vec_loads =
+      NOPE_DIM * sizeof(DType) / (VecTraits<use_256b>::ARCH_MAX_VEC_SIZE * 32);
+
+  const DType* nope_src =
+      ql_nope + token_id * nope_stride_0 + head_id * nope_stride_1;
+  DType* nope_dst = q_out + token_id * out_stride_0 + head_id * out_stride_1;
+
+#pragma unroll
+  for (int i = 0; i < nope_vec_loads; i++) {
+    const int offset = i * 32 + lane_id;
+    if constexpr (use_256b) {
+      st256_cs(reinterpret_cast<u32x8_t*>(nope_dst) + offset,
+               ld256_cs(reinterpret_cast<const u32x8_t*>(nope_src) + offset));
+    } else {
+      st128_cs(reinterpret_cast<int4*>(nope_dst) + offset,
+               ld128_cs(reinterpret_cast<const int4*>(nope_src) + offset));
+    }
+  }
+
+  const int* rope_src = reinterpret_cast<const int*>(
+      q_pe + token_id * pe_stride_0 + head_id * pe_stride_1);
+  int* rope_dst = reinterpret_cast<int*>(q_out + token_id * out_stride_0 +
+                                         head_id * out_stride_1 + NOPE_DIM);
+
+  st32_cs(rope_dst + lane_id, ld32_cs(rope_src + lane_id));
+}
+
+}  // namespace vllm
+
+#endif  // CONCAT_MLA_Q_CUH_

csrc/cpu/cpu_types.hpp

@@ -13,6 +13,9 @@
 #elif defined(__aarch64__)
   // arm implementation
   #include "cpu_types_arm.hpp"
+#elif defined(__riscv_v)
+  // riscv implementation
+  #include "cpu_types_riscv.hpp"
 #else
   #warning "unsupported vLLM cpu implementation, vLLM will compile with scalar"
   #include "cpu_types_scalar.hpp"

csrc/cpu/cpu_types_riscv.hpp

@@ -0,0 +1,832 @@
+#ifndef CPU_TYPES_RISCV_HPP
+#define CPU_TYPES_RISCV_HPP
+
+#include <algorithm>
+#include <cmath>
+#include <cstring>
+#include <iostream>
+#include <limits>
+#include <riscv_vector.h>
+#include <torch/all.h>
+
+// ============================================================================
+// Vector Register Type Definitions (VLEN=128 bits)
+// ============================================================================
+
+typedef vfloat16m1_t fixed_vfloat16m1_t
+    __attribute__((riscv_rvv_vector_bits(128)));
+typedef vfloat16m2_t fixed_vfloat16m2_t
+    __attribute__((riscv_rvv_vector_bits(256)));
+
+typedef vfloat32m1_t fixed_vfloat32m1_t
+    __attribute__((riscv_rvv_vector_bits(128)));
+typedef vfloat32m2_t fixed_vfloat32m2_t
+    __attribute__((riscv_rvv_vector_bits(256)));
+typedef vfloat32m4_t fixed_vfloat32m4_t
+    __attribute__((riscv_rvv_vector_bits(512)));
+typedef vfloat32m8_t fixed_vfloat32m8_t
+    __attribute__((riscv_rvv_vector_bits(1024)));
+
+typedef vint32m2_t fixed_vint32m2_t __attribute__((riscv_rvv_vector_bits(256)));
+typedef vint32m4_t fixed_vint32m4_t __attribute__((riscv_rvv_vector_bits(512)));
+
+typedef vuint16m1_t fixed_vuint16m1_t
+    __attribute__((riscv_rvv_vector_bits(128)));
+typedef vuint16m2_t fixed_vuint16m2_t
+    __attribute__((riscv_rvv_vector_bits(256)));
+typedef vuint16m4_t fixed_vuint16m4_t
+    __attribute__((riscv_rvv_vector_bits(512)));
+
+#ifdef RISCV_BF16_SUPPORT
+typedef vbfloat16m1_t fixed_vbfloat16m1_t
+    __attribute__((riscv_rvv_vector_bits(128)));
+typedef vbfloat16m2_t fixed_vbfloat16m2_t
+    __attribute__((riscv_rvv_vector_bits(256)));
+typedef vbfloat16m4_t fixed_vbfloat16m4_t
+    __attribute__((riscv_rvv_vector_bits(512)));
+#endif
+
+namespace vec_op {
+
+#ifdef RISCV_BF16_SUPPORT
+  #define VLLM_DISPATCH_CASE_FLOATING_TYPES(...)         \
+    AT_DISPATCH_CASE(at::ScalarType::Float, __VA_ARGS__) \
+    AT_DISPATCH_CASE(at::ScalarType::Half, __VA_ARGS__)  \
+    AT_DISPATCH_CASE(at::ScalarType::BFloat16, __VA_ARGS__)
+#else
+  #define VLLM_DISPATCH_CASE_FLOATING_TYPES(...)         \
+    AT_DISPATCH_CASE(at::ScalarType::Float, __VA_ARGS__) \
+    AT_DISPATCH_CASE(at::ScalarType::Half, __VA_ARGS__)
+#endif
+
+#define VLLM_DISPATCH_FLOATING_TYPES(TYPE, NAME, ...) \
+  AT_DISPATCH_SWITCH(TYPE, NAME, VLLM_DISPATCH_CASE_FLOATING_TYPES(__VA_ARGS__))
+
+#define FORCE_INLINE __attribute__((always_inline)) inline
+
+namespace {
+template <typename T, T... indexes, typename F>
+constexpr void unroll_loop_item(std::integer_sequence<T, indexes...>, F&& f) {
+  (f(std::integral_constant<T, indexes>{}), ...);
+};
+}  // namespace
+
+template <typename T, T count, typename F,
+          typename = std::enable_if_t<std::is_invocable_v<F, T>>>
+constexpr void unroll_loop(F&& f) {
+  unroll_loop_item(std::make_integer_sequence<T, count>{}, std::forward<F>(f));
+}
+
+template <typename T>
+struct Vec {
+  constexpr static int get_elem_num() { return T::VEC_ELEM_NUM; };
+};
+
+struct FP32Vec8;
+struct FP32Vec16;
+
+// ============================================================================
+// FP16 Implementation
+// ============================================================================
+
+struct FP16Vec8 : public Vec<FP16Vec8> {
+  constexpr static int VEC_ELEM_NUM = 8;
+  fixed_vfloat16m1_t reg;
+
+  explicit FP16Vec8(const void* ptr)
+      : reg(__riscv_vle16_v_f16m1(static_cast<const _Float16*>(ptr),
+                                  VEC_ELEM_NUM)) {};
+
+  explicit FP16Vec8(const FP32Vec8&);
+
+  void save(void* ptr) const {
+    __riscv_vse16_v_f16m1(static_cast<_Float16*>(ptr), reg, VEC_ELEM_NUM);
+  }
+  void save(void* ptr, int elem_num) const {
+    __riscv_vse16_v_f16m1(static_cast<_Float16*>(ptr), reg, elem_num);
+  }
+  void save_strided(void* ptr, ptrdiff_t stride) const {
+    ptrdiff_t byte_stride = stride * sizeof(_Float16);
+    __riscv_vsse16_v_f16m1(static_cast<_Float16*>(ptr), byte_stride, reg,
+                           VEC_ELEM_NUM);
+  }
+};
+
+struct FP16Vec16 : public Vec<FP16Vec16> {
+  constexpr static int VEC_ELEM_NUM = 16;
+  fixed_vfloat16m2_t reg;
+
+  explicit FP16Vec16(const void* ptr)
+      : reg(__riscv_vle16_v_f16m2(static_cast<const _Float16*>(ptr),
+                                  VEC_ELEM_NUM)) {};
+
+  explicit FP16Vec16(const FP32Vec16& vec);
+
+  void save(void* ptr) const {
+    __riscv_vse16_v_f16m2(static_cast<_Float16*>(ptr), reg, VEC_ELEM_NUM);
+  }
+  void save(void* ptr, int elem_num) const {
+    __riscv_vse16_v_f16m2(static_cast<_Float16*>(ptr), reg, elem_num);
+  }
+  void save_strided(void* ptr, ptrdiff_t stride) const {
+    ptrdiff_t byte_stride = stride * sizeof(_Float16);
+    __riscv_vsse16_v_f16m2(static_cast<_Float16*>(ptr), byte_stride, reg,
+                           VEC_ELEM_NUM);
+  }
+};
+
+// ============================================================================
+// BF16 Implementation
+// ============================================================================
+
+#ifdef RISCV_BF16_SUPPORT
+
+FORCE_INLINE fixed_vuint16m1_t bf16_to_u16(fixed_vbfloat16m1_t v) {
+  return __riscv_vreinterpret_v_bf16m1_u16m1(v);
+}
+FORCE_INLINE fixed_vuint16m2_t bf16_to_u16(fixed_vbfloat16m2_t v) {
+  return __riscv_vreinterpret_v_bf16m2_u16m2(v);
+}
+FORCE_INLINE fixed_vuint16m4_t bf16_to_u16(fixed_vbfloat16m4_t v) {
+  return __riscv_vreinterpret_v_bf16m4_u16m4(v);
+}
+
+struct BF16Vec8 : public Vec<BF16Vec8> {
+  constexpr static int VEC_ELEM_NUM = 8;
+  fixed_vbfloat16m1_t reg;
+
+  explicit BF16Vec8(const void* ptr)
+      : reg(__riscv_vreinterpret_v_u16m1_bf16m1(__riscv_vle16_v_u16m1(
+            reinterpret_cast<const uint16_t*>(ptr), VEC_ELEM_NUM))) {};
+
+  explicit BF16Vec8(fixed_vbfloat16m1_t data) : reg(data) {};
+  explicit BF16Vec8(const FP32Vec8&);
+
+  void save(void* ptr) const {
+    __riscv_vse16_v_u16m1(reinterpret_cast<uint16_t*>(ptr), bf16_to_u16(reg),
+                          VEC_ELEM_NUM);
+  }
+  void save(void* ptr, int elem_num) const {
+    __riscv_vse16_v_u16m1(reinterpret_cast<uint16_t*>(ptr), bf16_to_u16(reg),
+                          elem_num);
+  }
+  void save_strided(void* ptr, ptrdiff_t stride) const {
+    ptrdiff_t byte_stride = stride * sizeof(uint16_t);
+    __riscv_vsse16_v_u16m1(reinterpret_cast<uint16_t*>(ptr), byte_stride,
+                           bf16_to_u16(reg), VEC_ELEM_NUM);
+  }
+};
+
+struct BF16Vec16 : public Vec<BF16Vec16> {
+  constexpr static int VEC_ELEM_NUM = 16;
+  fixed_vbfloat16m2_t reg;
+
+  explicit BF16Vec16(const void* ptr)
+      : reg(__riscv_vreinterpret_v_u16m2_bf16m2(__riscv_vle16_v_u16m2(
+            reinterpret_cast<const uint16_t*>(ptr), VEC_ELEM_NUM))) {};
+
+  explicit BF16Vec16(fixed_vbfloat16m2_t data) : reg(data) {};
+  explicit BF16Vec16(const FP32Vec16&);
+
+  void save(void* ptr) const {
+    __riscv_vse16_v_u16m2(reinterpret_cast<uint16_t*>(ptr), bf16_to_u16(reg),
+                          VEC_ELEM_NUM);
+  }
+  void save(void* ptr, int elem_num) const {
+    __riscv_vse16_v_u16m2(reinterpret_cast<uint16_t*>(ptr), bf16_to_u16(reg),
+                          elem_num);
+  }
+  void save_strided(void* ptr, ptrdiff_t stride) const {
+    ptrdiff_t byte_stride = stride * sizeof(uint16_t);
+    __riscv_vsse16_v_u16m2(reinterpret_cast<uint16_t*>(ptr), byte_stride,
+                           bf16_to_u16(reg), VEC_ELEM_NUM);
+  }
+};
+
+struct BF16Vec32 : public Vec<BF16Vec32> {
+  constexpr static int VEC_ELEM_NUM = 32;
+  fixed_vbfloat16m4_t reg;
+
+  explicit BF16Vec32(const void* ptr)
+      : reg(__riscv_vreinterpret_v_u16m4_bf16m4(__riscv_vle16_v_u16m4(
+            reinterpret_cast<const uint16_t*>(ptr), VEC_ELEM_NUM))) {};
+
+  explicit BF16Vec32(fixed_vbfloat16m4_t data) : reg(data) {};
+
+  explicit BF16Vec32(const BF16Vec8& v) {
+    fixed_vuint16m1_t u16_val = bf16_to_u16(v.reg);
+    fixed_vuint16m4_t u16_combined =
+        __riscv_vcreate_v_u16m1_u16m4(u16_val, u16_val, u16_val, u16_val);
+    reg = __riscv_vreinterpret_v_u16m4_bf16m4(u16_combined);
+  };
+
+  void save(void* ptr) const {
+    __riscv_vse16_v_u16m4(reinterpret_cast<uint16_t*>(ptr), bf16_to_u16(reg),
+                          VEC_ELEM_NUM);
+  }
+  void save(void* ptr, int elem_num) const {
+    __riscv_vse16_v_u16m4(reinterpret_cast<uint16_t*>(ptr), bf16_to_u16(reg),
+                          elem_num);
+  }
+  void save_strided(void* ptr, ptrdiff_t stride) const {
+    ptrdiff_t byte_stride = stride * sizeof(uint16_t);
+    __riscv_vsse16_v_u16m4(reinterpret_cast<uint16_t*>(ptr), byte_stride,
+                           bf16_to_u16(reg), VEC_ELEM_NUM);
+  }
+};
+
+#else
+// ============================================================================
+// BF16 Fallback Implementation (FP32 Simulation)
+// ============================================================================
+
+struct BF16Vec8 : public Vec<BF16Vec8> {
+  constexpr static int VEC_ELEM_NUM = 8;
+  fixed_vfloat32m2_t reg_fp32;
+  explicit BF16Vec8(const void* ptr) {
+    const uint16_t* u16 = static_cast<const uint16_t*>(ptr);
+    float tmp[8];
+    for (int i = 0; i < 8; ++i) {
+      uint32_t v = static_cast<uint32_t>(u16[i]) << 16;
+      std::memcpy(&tmp[i], &v, 4);
+    }
+    reg_fp32 = __riscv_vle32_v_f32m2(tmp, 8);
+  }
+  explicit BF16Vec8(const FP32Vec8&);
+  void save(void* ptr) const {
+    float tmp[8];
+    __riscv_vse32_v_f32m2(tmp, reg_fp32, 8);
+    uint16_t* u16 = static_cast<uint16_t*>(ptr);
+    for (int i = 0; i < 8; ++i) {
+      uint32_t v;
+      std::memcpy(&v, &tmp[i], 4);
+      u16[i] = static_cast<uint16_t>(v >> 16);
+    }
+  }
+  void save(void* ptr, int elem_num) const {
+    float tmp[8];
+    __riscv_vse32_v_f32m2(tmp, reg_fp32, 8);
+    uint16_t* u16 = static_cast<uint16_t*>(ptr);
+    for (int i = 0; i < elem_num; ++i) {
+      uint32_t v;
+      std::memcpy(&v, &tmp[i], 4);
+      u16[i] = static_cast<uint16_t>(v >> 16);
+    }
+  }
+  void save_strided(void* ptr, ptrdiff_t stride) const {
+    float tmp[8];
+    __riscv_vse32_v_f32m2(tmp, reg_fp32, 8);
+    uint8_t* u8 = static_cast<uint8_t*>(ptr);
+    ptrdiff_t byte_stride = stride * sizeof(uint16_t);
+    for (int i = 0; i < 8; ++i) {
+      uint32_t v;
+      std::memcpy(&v, &tmp[i], 4);
+      uint16_t val = static_cast<uint16_t>(v >> 16);
+      *reinterpret_cast<uint16_t*>(u8 + i * byte_stride) = val;
+    }
+  }
+};
+
+struct BF16Vec16 : public Vec<BF16Vec16> {
+  constexpr static int VEC_ELEM_NUM = 16;
+  fixed_vfloat32m4_t reg_fp32;
+  explicit BF16Vec16(const void* ptr) {
+    const uint16_t* u16 = static_cast<const uint16_t*>(ptr);
+    float tmp[16];
+    for (int i = 0; i < 16; ++i) {
+      uint32_t v = static_cast<uint32_t>(u16[i]) << 16;
+      std::memcpy(&tmp[i], &v, 4);
+    }
+    reg_fp32 = __riscv_vle32_v_f32m4(tmp, 16);
+  }
+  explicit BF16Vec16(const FP32Vec16&);
+  void save(void* ptr) const {
+    float tmp[16];
+    __riscv_vse32_v_f32m4(tmp, reg_fp32, 16);
+    uint16_t* u16 = static_cast<uint16_t*>(ptr);
+    for (int i = 0; i < 16; ++i) {
+      uint32_t v;
+      std::memcpy(&v, &tmp[i], 4);
+      u16[i] = static_cast<uint16_t>(v >> 16);
+    }
+  }
+  void save(void* ptr, int elem_num) const {
+    float tmp[16];
+    __riscv_vse32_v_f32m4(tmp, reg_fp32, 16);
+    uint16_t* u16 = static_cast<uint16_t*>(ptr);
+    for (int i = 0; i < elem_num; ++i) {
+      uint32_t v;
+      std::memcpy(&v, &tmp[i], 4);
+      u16[i] = static_cast<uint16_t>(v >> 16);
+    }
+  }
+  void save_strided(void* ptr, ptrdiff_t stride) const {
+    float tmp[16];
+    __riscv_vse32_v_f32m4(tmp, reg_fp32, 16);
+    uint8_t* u8 = static_cast<uint8_t*>(ptr);
+    ptrdiff_t byte_stride = stride * sizeof(uint16_t);
+    for (int i = 0; i < 16; ++i) {
+      uint32_t v;
+      std::memcpy(&v, &tmp[i], 4);
+      uint16_t val = static_cast<uint16_t>(v >> 16);
+      *reinterpret_cast<uint16_t*>(u8 + i * byte_stride) = val;
+    }
+  }
+};
+
+struct BF16Vec32 : public Vec<BF16Vec32> {
+  constexpr static int VEC_ELEM_NUM = 32;
+  fixed_vfloat32m8_t reg_fp32;
+
+  explicit BF16Vec32(const void* ptr) {
+    const uint16_t* u16 = static_cast<const uint16_t*>(ptr);
+    float tmp[32];
+    for (int i = 0; i < 32; ++i) {
+      uint32_t v = static_cast<uint32_t>(u16[i]) << 16;
+      std::memcpy(&tmp[i], &v, 4);
+    }
+    reg_fp32 = __riscv_vle32_v_f32m8(tmp, 32);
+  }
+
+  explicit BF16Vec32(const BF16Vec8& v) {
+    float tmp_small[8];
+    __riscv_vse32_v_f32m2(tmp_small, v.reg_fp32, 8);
+    float tmp_large[32];
+    for (int i = 0; i < 4; ++i) {
+      std::memcpy(tmp_large + (i * 8), tmp_small, 8 * sizeof(float));
+    }
+    reg_fp32 = __riscv_vle32_v_f32m8(tmp_large, 32);
+  }
+
+  void save(void* ptr) const {
+    float tmp[32];
+    __riscv_vse32_v_f32m8(tmp, reg_fp32, 32);
+    uint16_t* u16 = static_cast<uint16_t*>(ptr);
+    for (int i = 0; i < 32; ++i) {
+      uint32_t v;
+      std::memcpy(&v, &tmp[i], 4);
+      u16[i] = static_cast<uint16_t>(v >> 16);
+    }
+  }
+
+  void save(void* ptr, int elem_num) const {
+    float tmp[32];
+    __riscv_vse32_v_f32m8(tmp, reg_fp32, 32);
+    uint16_t* u16 = static_cast<uint16_t*>(ptr);
+    for (int i = 0; i < elem_num; ++i) {
+      uint32_t v;
+      std::memcpy(&v, &tmp[i], 4);
+      u16[i] = static_cast<uint16_t>(v >> 16);
+    }
+  }
+
+  void save_strided(void* ptr, ptrdiff_t stride) const {
+    float tmp[32];
+    __riscv_vse32_v_f32m8(tmp, reg_fp32, 32);
+    uint8_t* u8 = static_cast<uint8_t*>(ptr);
+    ptrdiff_t byte_stride = stride * sizeof(uint16_t);
+    for (int i = 0; i < 32; ++i) {
+      uint32_t v;
+      std::memcpy(&v, &tmp[i], 4);
+      uint16_t val = static_cast<uint16_t>(v >> 16);
+      *reinterpret_cast<uint16_t*>(u8 + i * byte_stride) = val;
+    }
+  }
+};
+#endif
+
+// ============================================================================
+// FP32 Implementation
+// ============================================================================
+
+struct FP32Vec4 : public Vec<FP32Vec4> {
+  constexpr static int VEC_ELEM_NUM = 4;
+  fixed_vfloat32m1_t reg;
+  explicit FP32Vec4(float v) : reg(__riscv_vfmv_v_f_f32m1(v, VEC_ELEM_NUM)) {};
+  explicit FP32Vec4() : reg(__riscv_vfmv_v_f_f32m1(0.0f, VEC_ELEM_NUM)) {};
+  explicit FP32Vec4(const float* ptr)
+      : reg(__riscv_vle32_v_f32m1(ptr, VEC_ELEM_NUM)) {};
+  explicit FP32Vec4(fixed_vfloat32m1_t data) : reg(data) {};
+  explicit FP32Vec4(const FP32Vec4& data) : reg(data.reg) {};
+  void save(float* ptr) const { __riscv_vse32_v_f32m1(ptr, reg, VEC_ELEM_NUM); }
+  void save(float* ptr, int elem_num) const {
+    __riscv_vse32_v_f32m1(ptr, reg, elem_num);
+  }
+};
+
+struct FP32Vec8 : public Vec<FP32Vec8> {
+  constexpr static int VEC_ELEM_NUM = 8;
+  fixed_vfloat32m2_t reg;
+
+  explicit FP32Vec8(float v) : reg(__riscv_vfmv_v_f_f32m2(v, VEC_ELEM_NUM)) {};
+  explicit FP32Vec8() : reg(__riscv_vfmv_v_f_f32m2(0.0f, VEC_ELEM_NUM)) {};
+  explicit FP32Vec8(const float* ptr)
+      : reg(__riscv_vle32_v_f32m2(ptr, VEC_ELEM_NUM)) {};
+  explicit FP32Vec8(fixed_vfloat32m2_t data) : reg(data) {};
+  explicit FP32Vec8(const FP32Vec8& data) : reg(data.reg) {};
+  explicit FP32Vec8(const FP16Vec8& v)
+      : reg(__riscv_vfwcvt_f_f_v_f32m2(v.reg, VEC_ELEM_NUM)) {};
+  explicit FP32Vec8(fixed_vfloat16m1_t v)
+      : reg(__riscv_vfwcvt_f_f_v_f32m2(v, VEC_ELEM_NUM)) {};
+
+#ifdef RISCV_BF16_SUPPORT
+  explicit FP32Vec8(fixed_vbfloat16m1_t v)
+      : reg(__riscv_vfwcvtbf16_f_f_v_f32m2(v, VEC_ELEM_NUM)) {};
+  explicit FP32Vec8(const BF16Vec8& v)
+      : reg(__riscv_vfwcvtbf16_f_f_v_f32m2(v.reg, VEC_ELEM_NUM)) {};
+#else
+  explicit FP32Vec8(const BF16Vec8& v) : reg(v.reg_fp32) {};
+#endif
+
+  float reduce_sum() const {
+    fixed_vfloat32m1_t scalar = __riscv_vfmv_s_f_f32m1(0.0f, 1);
+    scalar = __riscv_vfredusum_vs_f32m2_f32m1(reg, scalar, VEC_ELEM_NUM);
+    return __riscv_vfmv_f_s_f32m1_f32(scalar);
+  }
+
+  FP32Vec8 operator*(const FP32Vec8& b) const {
+    return FP32Vec8(__riscv_vfmul_vv_f32m2(reg, b.reg, VEC_ELEM_NUM));
+  }
+  FP32Vec8 operator+(const FP32Vec8& b) const {
+    return FP32Vec8(__riscv_vfadd_vv_f32m2(reg, b.reg, VEC_ELEM_NUM));
+  }
+  FP32Vec8 operator-(const FP32Vec8& b) const {
+    return FP32Vec8(__riscv_vfsub_vv_f32m2(reg, b.reg, VEC_ELEM_NUM));
+  }
+  FP32Vec8 operator/(const FP32Vec8& b) const {
+    return FP32Vec8(__riscv_vfdiv_vv_f32m2(reg, b.reg, VEC_ELEM_NUM));
+  }
+
+  FP32Vec8 min(const FP32Vec8& b) const {
+    return FP32Vec8(__riscv_vfmin_vv_f32m2(reg, b.reg, VEC_ELEM_NUM));
+  }
+  FP32Vec8 max(const FP32Vec8& b) const {
+    return FP32Vec8(__riscv_vfmax_vv_f32m2(reg, b.reg, VEC_ELEM_NUM));
+  }
+  FP32Vec8 abs() const {
+    return FP32Vec8(__riscv_vfabs_v_f32m2(reg, VEC_ELEM_NUM));
+  }
+
+  FP32Vec8 min(const FP32Vec8& b, int elem_num) const {
+    return FP32Vec8(__riscv_vfmin_vv_f32m2(reg, b.reg, elem_num));
+  }
+  FP32Vec8 max(const FP32Vec8& b, int elem_num) const {
+    return FP32Vec8(__riscv_vfmax_vv_f32m2(reg, b.reg, elem_num));
+  }
+
+  FP32Vec8 clamp(const FP32Vec8& min_v, const FP32Vec8& max_v) const {
+    fixed_vfloat32m2_t temp =
+        __riscv_vfmax_vv_f32m2(min_v.reg, reg, VEC_ELEM_NUM);
+    return FP32Vec8(__riscv_vfmin_vv_f32m2(max_v.reg, temp, VEC_ELEM_NUM));
+  }
+
+  void save(float* ptr) const { __riscv_vse32_v_f32m2(ptr, reg, VEC_ELEM_NUM); }
+  void save(float* ptr, int elem_num) const {
+    __riscv_vse32_v_f32m2(ptr, reg, elem_num);
+  }
+  void save_strided(float* ptr, ptrdiff_t stride) const {
+    ptrdiff_t byte_stride = stride * sizeof(float);
+    __riscv_vsse32_v_f32m2(ptr, byte_stride, reg, VEC_ELEM_NUM);
+  }
+
+  FP32Vec8 exp() const {
+    const float inv_ln2 = 1.44269504088896341f;
+    fixed_vfloat32m2_t x_scaled =
+        __riscv_vfmul_vf_f32m2(reg, inv_ln2, VEC_ELEM_NUM);
+    fixed_vint32m2_t n_int = __riscv_vfcvt_x_f_v_i32m2(x_scaled, VEC_ELEM_NUM);
+    fixed_vfloat32m2_t n_float = __riscv_vfcvt_f_x_v_f32m2(n_int, VEC_ELEM_NUM);
+
+    fixed_vfloat32m2_t r =
+        __riscv_vfsub_vv_f32m2(x_scaled, n_float, VEC_ELEM_NUM);
+
+    fixed_vfloat32m2_t poly =
+        __riscv_vfmv_v_f_f32m2(0.001333355810164f, VEC_ELEM_NUM);
+    poly = __riscv_vfmul_vv_f32m2(poly, r, VEC_ELEM_NUM);
+    poly = __riscv_vfadd_vf_f32m2(poly, 0.009618129107628f, VEC_ELEM_NUM);
+    poly = __riscv_vfmul_vv_f32m2(poly, r, VEC_ELEM_NUM);
+    poly = __riscv_vfadd_vf_f32m2(poly, 0.055504108664821f, VEC_ELEM_NUM);
+    poly = __riscv_vfmul_vv_f32m2(poly, r, VEC_ELEM_NUM);
+    poly = __riscv_vfadd_vf_f32m2(poly, 0.240226506959101f, VEC_ELEM_NUM);
+    poly = __riscv_vfmul_vv_f32m2(poly, r, VEC_ELEM_NUM);
+    poly = __riscv_vfadd_vf_f32m2(poly, 0.693147180559945f, VEC_ELEM_NUM);
+    poly = __riscv_vfmul_vv_f32m2(poly, r, VEC_ELEM_NUM);
+    poly = __riscv_vfadd_vf_f32m2(poly, 1.0f, VEC_ELEM_NUM);
+
+    fixed_vint32m2_t biased_exp =
+        __riscv_vadd_vx_i32m2(n_int, 127, VEC_ELEM_NUM);
+    biased_exp = __riscv_vmax_vx_i32m2(biased_exp, 0, VEC_ELEM_NUM);
+    fixed_vint32m2_t exponent_bits =
+        __riscv_vsll_vx_i32m2(biased_exp, 23, VEC_ELEM_NUM);
+    fixed_vfloat32m2_t scale =
+        __riscv_vreinterpret_v_i32m2_f32m2(exponent_bits);
+
+    return FP32Vec8(__riscv_vfmul_vv_f32m2(poly, scale, VEC_ELEM_NUM));
+  }
+
+  FP32Vec8 tanh() const {
+    fixed_vfloat32m2_t x_clamped = __riscv_vfmin_vf_f32m2(
+        __riscv_vfmax_vf_f32m2(reg, -9.0f, VEC_ELEM_NUM), 9.0f, VEC_ELEM_NUM);
+    fixed_vfloat32m2_t x2 =
+        __riscv_vfmul_vf_f32m2(x_clamped, 2.0f, VEC_ELEM_NUM);
+    FP32Vec8 exp_val = FP32Vec8(x2).exp();
+    fixed_vfloat32m2_t num =
+        __riscv_vfsub_vf_f32m2(exp_val.reg, 1.0f, VEC_ELEM_NUM);
+    fixed_vfloat32m2_t den =
+        __riscv_vfadd_vf_f32m2(exp_val.reg, 1.0f, VEC_ELEM_NUM);
+    return FP32Vec8(__riscv_vfdiv_vv_f32m2(num, den, VEC_ELEM_NUM));
+  }
+
+  FP32Vec8 er() const {
+    const float p = 0.3275911f, a1 = 0.254829592f, a2 = -0.284496736f,
+                a3 = 1.421413741f, a4 = -1.453152027f, a5 = 1.061405429f;
+    fixed_vfloat32m2_t abs_x = __riscv_vfabs_v_f32m2(reg, VEC_ELEM_NUM);
+
+    fixed_vfloat32m2_t t = __riscv_vfadd_vf_f32m2(
+        __riscv_vfmul_vf_f32m2(abs_x, p, VEC_ELEM_NUM), 1.0f, VEC_ELEM_NUM);
+    t = __riscv_vfrdiv_vf_f32m2(t, 1.0f, VEC_ELEM_NUM);
+
+    fixed_vfloat32m2_t poly = __riscv_vfmv_v_f_f32m2(a5, VEC_ELEM_NUM);
+    poly = __riscv_vfadd_vf_f32m2(__riscv_vfmul_vv_f32m2(poly, t, VEC_ELEM_NUM),
+                                  a4, VEC_ELEM_NUM);
+    poly = __riscv_vfadd_vf_f32m2(__riscv_vfmul_vv_f32m2(poly, t, VEC_ELEM_NUM),
+                                  a3, VEC_ELEM_NUM);
+    poly = __riscv_vfadd_vf_f32m2(__riscv_vfmul_vv_f32m2(poly, t, VEC_ELEM_NUM),
+                                  a2, VEC_ELEM_NUM);
+    poly = __riscv_vfadd_vf_f32m2(__riscv_vfmul_vv_f32m2(poly, t, VEC_ELEM_NUM),
+                                  a1, VEC_ELEM_NUM);
+    poly = __riscv_vfmul_vv_f32m2(poly, t, VEC_ELEM_NUM);
+
+    fixed_vfloat32m2_t exp_val =
+        FP32Vec8(__riscv_vfneg_v_f32m2(
+                     __riscv_vfmul_vv_f32m2(abs_x, abs_x, VEC_ELEM_NUM),
+                     VEC_ELEM_NUM))
+            .exp()
+            .reg;
+    fixed_vfloat32m2_t res = __riscv_vfrsub_vf_f32m2(
+        __riscv_vfmul_vv_f32m2(poly, exp_val, VEC_ELEM_NUM), 1.0f,
+        VEC_ELEM_NUM);
+
+    vbool16_t mask = __riscv_vmflt_vf_f32m2_b16(reg, 0.0f, VEC_ELEM_NUM);
+    return FP32Vec8(__riscv_vfneg_v_f32m2_m(mask, res, VEC_ELEM_NUM));
+  }
+};
+
+struct FP32Vec16 : public Vec<FP32Vec16> {
+  constexpr static int VEC_ELEM_NUM = 16;
+  fixed_vfloat32m4_t reg;
+
+  explicit FP32Vec16(float v) : reg(__riscv_vfmv_v_f_f32m4(v, VEC_ELEM_NUM)) {};
+  explicit FP32Vec16() : reg(__riscv_vfmv_v_f_f32m4(0.0f, VEC_ELEM_NUM)) {};
+  explicit FP32Vec16(const float* ptr)
+      : reg(__riscv_vle32_v_f32m4(ptr, VEC_ELEM_NUM)) {};
+  explicit FP32Vec16(fixed_vfloat32m4_t data) : reg(data) {};
+  explicit FP32Vec16(const FP32Vec8& data)
+      : reg(__riscv_vcreate_v_f32m2_f32m4(data.reg, data.reg)) {};
+  explicit FP32Vec16(const FP32Vec16& data) : reg(data.reg) {};
+  explicit FP32Vec16(const FP16Vec16& v);
+
+#ifdef RISCV_BF16_SUPPORT
+  explicit FP32Vec16(fixed_vbfloat16m2_t v)
+      : reg(__riscv_vfwcvtbf16_f_f_v_f32m4(v, VEC_ELEM_NUM)) {};
+  explicit FP32Vec16(const BF16Vec16& v)
+      : reg(__riscv_vfwcvtbf16_f_f_v_f32m4(v.reg, VEC_ELEM_NUM)) {};
+#else
+  explicit FP32Vec16(const BF16Vec16& v) : reg(v.reg_fp32) {};
+#endif
+
+  FP32Vec16 operator+(const FP32Vec16& b) const {
+    return FP32Vec16(__riscv_vfadd_vv_f32m4(reg, b.reg, VEC_ELEM_NUM));
+  }
+  FP32Vec16 operator-(const FP32Vec16& b) const {
+    return FP32Vec16(__riscv_vfsub_vv_f32m4(reg, b.reg, VEC_ELEM_NUM));
+  }
+  FP32Vec16 operator*(const FP32Vec16& b) const {
+    return FP32Vec16(__riscv_vfmul_vv_f32m4(reg, b.reg, VEC_ELEM_NUM));
+  }
+  FP32Vec16 operator/(const FP32Vec16& b) const {
+    return FP32Vec16(__riscv_vfdiv_vv_f32m4(reg, b.reg, VEC_ELEM_NUM));
+  }
+
+  FP32Vec16 fma(const FP32Vec16& a, const FP32Vec16& b) const {
+    return FP32Vec16(__riscv_vfmacc_vv_f32m4(reg, a.reg, b.reg, VEC_ELEM_NUM));
+  }
+
+  float reduce_sum() const {
+    fixed_vfloat32m1_t scalar = __riscv_vfmv_s_f_f32m1(0.0f, 1);
+    scalar = __riscv_vfredusum_vs_f32m4_f32m1(reg, scalar, VEC_ELEM_NUM);
+    return __riscv_vfmv_f_s_f32m1_f32(scalar);
+  }
+
+  float reduce_max() const {
+    fixed_vfloat32m1_t scalar =
+        __riscv_vfmv_s_f_f32m1(std::numeric_limits<float>::lowest(), 1);
+    scalar = __riscv_vfredmax_vs_f32m4_f32m1(reg, scalar, VEC_ELEM_NUM);
+    return __riscv_vfmv_f_s_f32m1_f32(scalar);
+  }
+
+  float reduce_min() const {
+    fixed_vfloat32m1_t scalar =
+        __riscv_vfmv_s_f_f32m1(std::numeric_limits<float>::max(), 1);
+    scalar = __riscv_vfredmin_vs_f32m4_f32m1(reg, scalar, VEC_ELEM_NUM);
+    return __riscv_vfmv_f_s_f32m1_f32(scalar);
+  }
+
+  template <int group_size>
+  float reduce_sub_sum(int idx) {
+    static_assert(VEC_ELEM_NUM % group_size == 0);
+    const int start = idx * group_size;
+    vuint32m4_t indices = __riscv_vid_v_u32m4(VEC_ELEM_NUM);
+    vbool8_t mask = __riscv_vmand_mm_b8(
+        __riscv_vmsgeu_vx_u32m4_b8(indices, start, VEC_ELEM_NUM),
+        __riscv_vmsltu_vx_u32m4_b8(indices, start + group_size, VEC_ELEM_NUM),
+        VEC_ELEM_NUM);
+    fixed_vfloat32m1_t scalar = __riscv_vfmv_s_f_f32m1(0.0f, 1);
+    scalar =
+        __riscv_vfredusum_vs_f32m4_f32m1_m(mask, reg, scalar, VEC_ELEM_NUM);
+    return __riscv_vfmv_f_s_f32m1_f32(scalar);
+  };
+
+  FP32Vec16 max(const FP32Vec16& b) const {
+    return FP32Vec16(__riscv_vfmax_vv_f32m4(reg, b.reg, VEC_ELEM_NUM));
+  }
+  FP32Vec16 min(const FP32Vec16& b) const {
+    return FP32Vec16(__riscv_vfmin_vv_f32m4(reg, b.reg, VEC_ELEM_NUM));
+  }
+  FP32Vec16 abs() const {
+    return FP32Vec16(__riscv_vfabs_v_f32m4(reg, VEC_ELEM_NUM));
+  }
+
+  FP32Vec16 clamp(const FP32Vec16& min_v, const FP32Vec16& max_v) const {
+    return FP32Vec16(__riscv_vfmin_vv_f32m4(
+        max_v.reg, __riscv_vfmax_vv_f32m4(min_v.reg, reg, VEC_ELEM_NUM),
+        VEC_ELEM_NUM));
+  }
+
+  void save(float* ptr) const { __riscv_vse32_v_f32m4(ptr, reg, VEC_ELEM_NUM); }
+  void save(float* ptr, int elem_num) const {
+    __riscv_vse32_v_f32m4(ptr, reg, elem_num);
+  }
+  void save_strided(float* ptr, ptrdiff_t stride) const {
+    ptrdiff_t byte_stride = stride * sizeof(float);
+    __riscv_vsse32_v_f32m4(ptr, byte_stride, reg, VEC_ELEM_NUM);
+  }
+
+  FP32Vec16 exp() const {
+    const float inv_ln2 = 1.44269504088896341f;
+    fixed_vfloat32m4_t x_scaled =
+        __riscv_vfmul_vf_f32m4(reg, inv_ln2, VEC_ELEM_NUM);
+    fixed_vint32m4_t n_int = __riscv_vfcvt_x_f_v_i32m4(x_scaled, VEC_ELEM_NUM);
+    fixed_vfloat32m4_t n_float = __riscv_vfcvt_f_x_v_f32m4(n_int, VEC_ELEM_NUM);
+    fixed_vfloat32m4_t r =
+        __riscv_vfsub_vv_f32m4(x_scaled, n_float, VEC_ELEM_NUM);
+
+    fixed_vfloat32m4_t poly =
+        __riscv_vfmv_v_f_f32m4(0.001333355810164f, VEC_ELEM_NUM);
+    poly = __riscv_vfadd_vf_f32m4(__riscv_vfmul_vv_f32m4(poly, r, VEC_ELEM_NUM),
+                                  0.009618129107628f, VEC_ELEM_NUM);
+    poly = __riscv_vfadd_vf_f32m4(__riscv_vfmul_vv_f32m4(poly, r, VEC_ELEM_NUM),
+                                  0.055504108664821f, VEC_ELEM_NUM);
+    poly = __riscv_vfadd_vf_f32m4(__riscv_vfmul_vv_f32m4(poly, r, VEC_ELEM_NUM),
+                                  0.240226506959101f, VEC_ELEM_NUM);
+    poly = __riscv_vfadd_vf_f32m4(__riscv_vfmul_vv_f32m4(poly, r, VEC_ELEM_NUM),
+                                  0.693147180559945f, VEC_ELEM_NUM);
+    poly = __riscv_vfadd_vf_f32m4(__riscv_vfmul_vv_f32m4(poly, r, VEC_ELEM_NUM),
+                                  1.0f, VEC_ELEM_NUM);
+
+    fixed_vint32m4_t biased_exp = __riscv_vmax_vx_i32m4(
+        __riscv_vadd_vx_i32m4(n_int, 127, VEC_ELEM_NUM), 0, VEC_ELEM_NUM);
+    fixed_vfloat32m4_t scale = __riscv_vreinterpret_v_i32m4_f32m4(
+        __riscv_vsll_vx_i32m4(biased_exp, 23, VEC_ELEM_NUM));
+
+    return FP32Vec16(__riscv_vfmul_vv_f32m4(poly, scale, VEC_ELEM_NUM));
+  }
+
+  FP32Vec16 tanh() const {
+    fixed_vfloat32m4_t x_clamped = __riscv_vfmin_vf_f32m4(
+        __riscv_vfmax_vf_f32m4(reg, -9.0f, VEC_ELEM_NUM), 9.0f, VEC_ELEM_NUM);
+    FP32Vec16 exp_val =
+        FP32Vec16(__riscv_vfmul_vf_f32m4(x_clamped, 2.0f, VEC_ELEM_NUM)).exp();
+    return FP32Vec16(__riscv_vfdiv_vv_f32m4(
+        __riscv_vfsub_vf_f32m4(exp_val.reg, 1.0f, VEC_ELEM_NUM),
+        __riscv_vfadd_vf_f32m4(exp_val.reg, 1.0f, VEC_ELEM_NUM), VEC_ELEM_NUM));
+  }
+
+  FP32Vec16 er() const {
+    const float p = 0.3275911f, a1 = 0.254829592f, a2 = -0.284496736f,
+                a3 = 1.421413741f, a4 = -1.453152027f, a5 = 1.061405429f;
+    fixed_vfloat32m4_t abs_x = __riscv_vfabs_v_f32m4(reg, VEC_ELEM_NUM);
+    fixed_vfloat32m4_t t = __riscv_vfrdiv_vf_f32m4(
+        __riscv_vfadd_vf_f32m4(__riscv_vfmul_vf_f32m4(abs_x, p, VEC_ELEM_NUM),
+                               1.0f, VEC_ELEM_NUM),
+        1.0f, VEC_ELEM_NUM);
+
+    fixed_vfloat32m4_t poly = __riscv_vfmv_v_f_f32m4(a5, VEC_ELEM_NUM);
+    poly = __riscv_vfadd_vf_f32m4(__riscv_vfmul_vv_f32m4(poly, t, VEC_ELEM_NUM),
+                                  a4, VEC_ELEM_NUM);
+    poly = __riscv_vfadd_vf_f32m4(__riscv_vfmul_vv_f32m4(poly, t, VEC_ELEM_NUM),
+                                  a3, VEC_ELEM_NUM);
+    poly = __riscv_vfadd_vf_f32m4(__riscv_vfmul_vv_f32m4(poly, t, VEC_ELEM_NUM),
+                                  a2, VEC_ELEM_NUM);
+    poly = __riscv_vfadd_vf_f32m4(__riscv_vfmul_vv_f32m4(poly, t, VEC_ELEM_NUM),
+                                  a1, VEC_ELEM_NUM);
+    poly = __riscv_vfmul_vv_f32m4(poly, t, VEC_ELEM_NUM);
+
+    fixed_vfloat32m4_t exp_val =
+        FP32Vec16(__riscv_vfneg_v_f32m4(
+                      __riscv_vfmul_vv_f32m4(abs_x, abs_x, VEC_ELEM_NUM),
+                      VEC_ELEM_NUM))
+            .exp()
+            .reg;
+    fixed_vfloat32m4_t res = __riscv_vfrsub_vf_f32m4(
+        __riscv_vfmul_vv_f32m4(poly, exp_val, VEC_ELEM_NUM), 1.0f,
+        VEC_ELEM_NUM);
+
+    vbool8_t mask = __riscv_vmflt_vf_f32m4_b8(reg, 0.0f, VEC_ELEM_NUM);
+    return FP32Vec16(__riscv_vfneg_v_f32m4_m(mask, res, VEC_ELEM_NUM));
+  }
+};
+
+// ============================================================================
+// Type Traits & Global Helpers
+// ============================================================================
+
+template <typename T>
+struct VecType {
+  using vec_type = void;
+  using vec_t = void;
+};
+
+template <typename T>
+using vec_t = typename VecType<T>::vec_type;
+
+template <>
+struct VecType<float> {
+  using vec_type = FP32Vec8;
+  using vec_t = FP32Vec8;
+};
+template <>
+struct VecType<c10::Half> {
+  using vec_type = FP16Vec8;
+  using vec_t = FP16Vec8;
+};
+template <>
+struct VecType<c10::BFloat16> {
+  using vec_type = BF16Vec8;
+  using vec_t = BF16Vec8;
+};
+
+template <typename T>
+void storeFP32(float v, T* ptr) {
+  *ptr = v;
+}
+template <>
+inline void storeFP32<c10::Half>(float v, c10::Half* ptr) {
+  *reinterpret_cast<_Float16*>(ptr) = static_cast<_Float16>(v);
+}
+
+inline FP16Vec16::FP16Vec16(const FP32Vec16& v) {
+  reg = __riscv_vfncvt_f_f_w_f16m2(v.reg, VEC_ELEM_NUM);
+}
+inline FP16Vec8::FP16Vec8(const FP32Vec8& v) {
+  reg = __riscv_vfncvt_f_f_w_f16m1(v.reg, VEC_ELEM_NUM);
+}
+inline FP32Vec16::FP32Vec16(const FP16Vec16& v) {
+  reg = __riscv_vfwcvt_f_f_v_f32m4(v.reg, VEC_ELEM_NUM);
+}
+inline void fma(FP32Vec16& acc, const FP32Vec16& a, const FP32Vec16& b) {
+  acc = acc.fma(a, b);
+}
+
+#ifdef RISCV_BF16_SUPPORT
+template <>
+inline void storeFP32<c10::BFloat16>(float v, c10::BFloat16* ptr) {
+  *ptr = static_cast<__bf16>(v);
+};
+inline BF16Vec8::BF16Vec8(const FP32Vec8& v)
+    : reg(__riscv_vfncvtbf16_f_f_w_bf16m1(v.reg, VEC_ELEM_NUM)) {};
+inline BF16Vec16::BF16Vec16(const FP32Vec16& v)
+    : reg(__riscv_vfncvtbf16_f_f_w_bf16m2(v.reg, VEC_ELEM_NUM)) {};
+#else
+template <>
+inline void storeFP32<c10::BFloat16>(float v, c10::BFloat16* ptr) {
+  uint32_t val;
+  std::memcpy(&val, &v, 4);
+  *reinterpret_cast<uint16_t*>(ptr) = static_cast<uint16_t>(val >> 16);
+}
+inline BF16Vec8::BF16Vec8(const FP32Vec8& v) : reg_fp32(v.reg) {}
+inline BF16Vec16::BF16Vec16(const FP32Vec16& v) : reg_fp32(v.reg) {}
+#endif
+
+inline void prefetch(const void* addr) { __builtin_prefetch(addr, 0, 1); }
+
+}  // namespace vec_op
+
+#ifndef CPU_KERNEL_GUARD_IN
+  #define CPU_KERNEL_GUARD_IN(NAME)
+#endif
+
+#ifndef CPU_KERNEL_GUARD_OUT
+  #define CPU_KERNEL_GUARD_OUT(NAME)
+#endif
+
+#endif  // CPU_TYPES_RISCV_HPP

csrc/cuda_vec_utils.cuh

@@ -196,7 +196,7 @@ __forceinline__ __device__ u32x8_t ld256_cs(const u32x8_t* addr) {
   return val;
 #else
   assert(false && "ld256_cs requires SM100+ with CUDA 12.9+");
-  return {};
+  return u32x8_t{};
 #endif
 }
 
@@ -211,23 +211,51 @@ __forceinline__ __device__ void st256_cs(u32x8_t* addr, u32x8_t val) {
 #endif
 }
 
-// 32-bit cache-streaming (.cs) load / store  — SM100+ only.
+// 32-bit load / store.
+__device__ __forceinline__ int ld32(const int* addr) { return __ldg(addr); }
+
+__device__ __forceinline__ void st32(int* addr, int val) { *addr = val; }
+
+// 32-bit cache-streaming (.cs) load / store.
+// Falls back to ld32/st32 on ROCm (no .cs hint).
 __forceinline__ __device__ int ld32_cs(const int* addr) {
-#if VLLM_256B_PTX_ENABLED
   int val;
+#ifndef USE_ROCM
   asm volatile("ld.global.cs.b32 %0, [%1];" : "=r"(val) : "l"(addr));
-  return val;
 #else
-  assert(false && "ld32_cs requires SM100+ with CUDA 12.9+");
-  return 0;
+  val = ld32(addr);
 #endif
+  return val;
 }
 
 __forceinline__ __device__ void st32_cs(int* addr, int val) {
-#if VLLM_256B_PTX_ENABLED
+#ifndef USE_ROCM
   asm volatile("st.global.cs.b32 [%0], %1;" ::"l"(addr), "r"(val));
 #else
-  assert(false && "st32_cs requires SM100+ with CUDA 12.9+");
+  st32(addr, val);
+#endif
+}
+
+// 128-bit cache-streaming (.cs) load / store.
+// Falls back to ld128/st128 on ROCm (no .cs hint).
+__forceinline__ __device__ int4 ld128_cs(const int4* addr) {
+  int4 val;
+#ifndef USE_ROCM
+  asm volatile("ld.global.cs.v4.u32 {%0,%1,%2,%3}, [%4];"
+               : "=r"(val.x), "=r"(val.y), "=r"(val.z), "=r"(val.w)
+               : "l"(addr));
+#else
+  ld128(val, addr);
+#endif
+  return val;
+}
+
+__forceinline__ __device__ void st128_cs(int4* addr, int4 val) {
+#ifndef USE_ROCM
+  asm volatile("st.global.cs.v4.u32 [%0], {%1,%2,%3,%4};" ::"l"(addr),
+               "r"(val.x), "r"(val.y), "r"(val.z), "r"(val.w));
+#else
+  st128(val, addr);
 #endif
 }
 
@@ -260,7 +288,7 @@ __device__ __forceinline__ void ld256_cg_or_zero(u32x8_t& val, const void* ptr,
 
 __device__ __forceinline__ void ld128_cg_or_zero(uint4& val, const void* ptr,
                                                  bool pred) {
-#if VLLM_256B_PTX_ENABLED
+#ifndef USE_ROCM
   uint32_t r0, r1, r2, r3;
 
   asm volatile(
@@ -278,7 +306,7 @@ __device__ __forceinline__ void ld128_cg_or_zero(uint4& val, const void* ptr,
 
   val = uint4{r0, r1, r2, r3};
 #else
-  assert(false && "ld128_cg_or_zero requires SM100+ with CUDA 12.9+");
+  assert(false && "ld128_cg_or_zero is not supported on ROCm");
 #endif
 }
 

csrc/cumem_allocator.cpp

@@ -109,16 +109,18 @@ void create_and_map(unsigned long long device, ssize_t size, CUdeviceptr d_mem,
 
 #ifndef USE_ROCM
   int flag = 0;
-  CUDA_CHECK(cuDeviceGetAttribute(
+  CUresult rdma_result = cuDeviceGetAttribute(
       &flag, CU_DEVICE_ATTRIBUTE_GPU_DIRECT_RDMA_WITH_CUDA_VMM_SUPPORTED,
-      device));
-  if (flag) {  // support GPUDirect RDMA if possible
+      device);
+  if (rdma_result == CUDA_SUCCESS &&
+      flag) {  // support GPUDirect RDMA if possible
     prop.allocFlags.gpuDirectRDMACapable = 1;
   }
   int fab_flag = 0;
-  CUDA_CHECK(cuDeviceGetAttribute(
-      &fab_flag, CU_DEVICE_ATTRIBUTE_HANDLE_TYPE_FABRIC_SUPPORTED, device));
-  if (fab_flag) {  // support fabric handle if possible
+  CUresult fab_result = cuDeviceGetAttribute(
+      &fab_flag, CU_DEVICE_ATTRIBUTE_HANDLE_TYPE_FABRIC_SUPPORTED, device);
+  if (fab_result == CUDA_SUCCESS &&
+      fab_flag) {  // support fabric handle if possible
     prop.requestedHandleTypes = CU_MEM_HANDLE_TYPE_FABRIC;
   }
 #endif

csrc/moe/moe_permute_unpermute_op.cu

@@ -73,10 +73,9 @@ void moe_permute(
   MOE_DISPATCH(input.scalar_type(), [&] {
     expandInputRowsKernelLauncher<scalar_t>(
         get_ptr<scalar_t>(input), get_ptr<scalar_t>(permuted_input),
-        get_ptr<int>(permuted_experts_id), get_ptr<int>(sorted_row_idx),
-        get_ptr<int>(inv_permuted_idx), get_ptr<int>(permuted_idx),
-        get_ptr<int64_t>(expert_first_token_offset), n_token, valid_num_ptr,
-        n_hidden, topk, n_local_expert, stream);
+        get_ptr<int>(sorted_row_idx), get_ptr<int>(inv_permuted_idx),
+        get_ptr<int>(permuted_idx), get_ptr<int64_t>(expert_first_token_offset),
+        n_token, valid_num_ptr, n_hidden, topk, n_local_expert, stream);
   });
 }
 

csrc/moe/permute_unpermute_kernels/moe_permute_unpermute_kernel.h

@@ -57,7 +57,7 @@ void sortAndScanExpert(const int* expert_for_source_row, const int* source_rows,
 
 template <typename T>
 void expandInputRowsKernelLauncher(
-    T const* unpermuted_input, T* permuted_output, int* sorted_experts,
+    T const* unpermuted_input, T* permuted_output,
     int const* expanded_dest_row_to_expanded_source_row,
     int* expanded_source_row_to_expanded_dest_row, int* permuted_idx,
     int64_t const* expert_first_token_offset, int64_t const num_rows,

csrc/moe/permute_unpermute_kernels/moe_permute_unpermute_kernel.inl

@@ -2,7 +2,7 @@
 
 template <typename T, bool CHECK_SKIPPED>
 __global__ void expandInputRowsKernel(
-    T const* unpermuted_input, T* permuted_output, int* sorted_experts,
+    T const* unpermuted_input, T* permuted_output,
     int const* expanded_dest_row_to_expanded_source_row,
     int* expanded_source_row_to_expanded_dest_row, int* permuted_idx,
     int64_t const* expert_first_token_offset, int64_t const num_rows,
@@ -16,7 +16,6 @@ __global__ void expandInputRowsKernel(
   int64_t expanded_dest_row = blockIdx.x;
   int64_t const expanded_source_row =
       expanded_dest_row_to_expanded_source_row[expanded_dest_row];
-  int expert_id = sorted_experts[expanded_dest_row];
 
   if (threadIdx.x == 0) {
     assert(expanded_dest_row <= INT32_MAX);
@@ -54,7 +53,7 @@ __global__ void expandInputRowsKernel(
 
 template <typename T>
 void expandInputRowsKernelLauncher(
-    T const* unpermuted_input, T* permuted_output, int* sorted_experts,
+    T const* unpermuted_input, T* permuted_output,
     int const* expanded_dest_row_to_expanded_source_row,
     int* expanded_source_row_to_expanded_dest_row, int* permuted_idx,
     int64_t const* expert_first_token_offset, int64_t const num_rows,
@@ -70,12 +69,12 @@ void expandInputRowsKernelLauncher(
   bool is_check_skip = num_valid_tokens_ptr != nullptr;
   auto func = func_map[is_check_skip];
 
-  func<<<blocks, threads, 0, stream>>>(
-      unpermuted_input, permuted_output, sorted_experts,
-      expanded_dest_row_to_expanded_source_row,
-      expanded_source_row_to_expanded_dest_row, permuted_idx,
-      expert_first_token_offset, num_rows, num_valid_tokens_ptr, cols, k,
-      num_local_experts);
+  func<<<blocks, threads, 0, stream>>>(unpermuted_input, permuted_output,
+                                       expanded_dest_row_to_expanded_source_row,
+                                       expanded_source_row_to_expanded_dest_row,
+                                       permuted_idx, expert_first_token_offset,
+                                       num_rows, num_valid_tokens_ptr, cols, k,
+                                       num_local_experts);
 }
 
 template <class T, class U>

csrc/ops.h

@@ -295,10 +295,14 @@ void cutlass_scaled_sparse_mm(torch::Tensor& out, torch::Tensor const& a,
 
 std::vector<torch::Tensor> cutlass_sparse_compress(torch::Tensor const& a);
 
-void scaled_fp4_quant(torch::Tensor& output, torch::Tensor const& input,
-                      torch::Tensor& output_scale,
-                      torch::Tensor const& input_scale,
-                      bool is_sf_swizzled_layout);
+std::tuple<torch::Tensor, torch::Tensor> scaled_fp4_quant_func(
+    torch::Tensor const& input, torch::Tensor const& input_scale,
+    bool is_sf_swizzled_layout);
+
+void scaled_fp4_quant_out(torch::Tensor const& input,
+                          torch::Tensor const& input_scale,
+                          bool is_sf_swizzled_layout, torch::Tensor& output,
+                          torch::Tensor& output_scale);
 
 void scaled_fp4_experts_quant(
     torch::Tensor& output, torch::Tensor& output_scale,

csrc/quantization/fp4/nvfp4_quant_entry.cu

@@ -16,6 +16,8 @@
 
 #include <torch/all.h>
 
+#include "nvfp4_utils.cuh"
+
 #if (defined(ENABLE_NVFP4_SM100) && ENABLE_NVFP4_SM100) || \
     (defined(ENABLE_NVFP4_SM120) && ENABLE_NVFP4_SM120)
 void scaled_fp4_quant_sm1xxa(torch::Tensor const& output,
@@ -51,9 +53,10 @@ void silu_and_mul_scaled_fp4_experts_quant_sm1xxa(
     torch::Tensor const& output_scale_offset_by_experts);
 #endif
 
-void scaled_fp4_quant(torch::Tensor& output, torch::Tensor const& input,
-                      torch::Tensor& output_sf, torch::Tensor const& input_sf,
-                      bool is_sf_swizzled_layout) {
+void scaled_fp4_quant_out(torch::Tensor const& input,
+                          torch::Tensor const& input_sf,
+                          bool is_sf_swizzled_layout, torch::Tensor& output,
+                          torch::Tensor& output_sf) {
 #if (defined(ENABLE_NVFP4_SM100) && ENABLE_NVFP4_SM100) || \
     (defined(ENABLE_NVFP4_SM120) && ENABLE_NVFP4_SM120)
   return scaled_fp4_quant_sm1xxa(output, input, output_sf, input_sf,
@@ -62,6 +65,34 @@ void scaled_fp4_quant(torch::Tensor& output, torch::Tensor const& input,
   TORCH_CHECK_NOT_IMPLEMENTED(false, "No compiled nvfp4 quantization kernel");
 }
 
+std::tuple<torch::Tensor, torch::Tensor> scaled_fp4_quant_func(
+    torch::Tensor const& input, torch::Tensor const& input_sf,
+    bool is_sf_swizzled_layout) {
+  int64_t n = input.size(-1);
+  int64_t m = input.numel() / n;
+  auto device = input.device();
+
+  // Two fp4 values packed into a uint8
+  auto output = torch::empty(
+      {m, n / 2}, torch::TensorOptions().device(device).dtype(torch::kUInt8));
+
+  torch::Tensor output_sf;
+  if (is_sf_swizzled_layout) {
+    auto [sf_m, sf_n] = vllm::computeSwizzledSFShape(m, n);
+    output_sf = torch::empty(
+        {sf_m, sf_n},
+        torch::TensorOptions().device(device).dtype(torch::kInt32));
+  } else {
+    output_sf = torch::empty(
+        {m, n / CVT_FP4_SF_VEC_SIZE},
+        torch::TensorOptions().device(device).dtype(torch::kUInt8));
+  }
+
+  scaled_fp4_quant_out(input, input_sf, is_sf_swizzled_layout, output,
+                       output_sf);
+  return {output, output_sf};
+}
+
 void scaled_fp4_experts_quant(
     torch::Tensor& output, torch::Tensor& output_scale,
     torch::Tensor const& input, torch::Tensor const& input_global_scale,

csrc/quantization/fp4/nvfp4_utils.cuh

@@ -18,6 +18,7 @@
 
 #include <cuda_runtime.h>
 #include <cuda_fp8.h>
+#include <utility>
 
 #include "../../cuda_vec_utils.cuh"
 
@@ -54,6 +55,18 @@ inline int computeEffectiveRows(int m) {
   return round_up(m, ROW_TILE);
 }
 
+// Compute the shape of the swizzled SF output tensor.
+// Returns (rounded_m, rounded_n / 4) where:
+//   rounded_m = round_up(m, 128)
+//   rounded_n = round_up(n / CVT_FP4_SF_VEC_SIZE, 4)
+inline std::pair<int64_t, int64_t> computeSwizzledSFShape(int64_t m,
+                                                          int64_t n) {
+  int64_t rounded_m = round_up(m, static_cast<int64_t>(128));
+  int64_t scale_n = n / CVT_FP4_SF_VEC_SIZE;
+  int64_t rounded_n = round_up(scale_n, static_cast<int64_t>(4));
+  return {rounded_m, rounded_n / 4};
+}
+
 // Convert 8 float32 values into 8 e2m1 values (represented as one uint32_t).
 inline __device__ uint32_t fp32_vec8_to_e2m1(float (&array)[8]) {
   uint32_t val;

csrc/quantization/fused_kernels/fused_layernorm_dynamic_per_token_quant.cu

@@ -15,31 +15,33 @@ __device__ void rms_norm_dynamic_per_token_quant_vec(
     scalar_t const* __restrict__ input,   // [..., hidden_size]
     scalar_t const* __restrict__ weight,  // [hidden_size]
     float const* scale_ub, float const var_epsilon, int32_t const hidden_size,
-    scalar_t* __restrict__ residual = nullptr) {
+    int32_t const input_stride, scalar_t* __restrict__ residual = nullptr) {
   float rms = 0.0f;
   float token_scale = 0.0f;
 
   // Compute rms
   vllm::vectorized::compute_rms<scalar_t, has_residual>(
-      &rms, input, hidden_size, var_epsilon, residual);
+      &rms, input, hidden_size, input_stride, var_epsilon, residual);
 
   // Compute scale
   vllm::vectorized::compute_dynamic_per_token_scales<scalar_t, scalar_out_t,
                                                      has_residual>(
       &token_scale, scales, input, weight, rms, scale_ub, hidden_size,
-      residual);
+      input_stride, residual);
 
   // RMS Norm + Quant
   if constexpr (std::is_same_v<scalar_out_t, int8_t>) {
     token_scale = 1.0f / token_scale;
     vllm::vectorized::norm_and_quant<scalar_t, scalar_out_t, true,
-                                     has_residual>(
-        out, input, weight, rms, &token_scale, hidden_size, residual);
+                                     has_residual>(out, input, weight, rms,
+                                                   &token_scale, hidden_size,
+                                                   input_stride, residual);
   } else {
     // FP8 - Do not invert token_scale for exact match with FBGemm
     vllm::vectorized::norm_and_quant<scalar_t, scalar_out_t, false,
-                                     has_residual>(
-        out, input, weight, rms, &token_scale, hidden_size, residual);
+                                     has_residual>(out, input, weight, rms,
+                                                   &token_scale, hidden_size,
+                                                   input_stride, residual);
   }
 }
 
@@ -51,38 +53,40 @@ __global__ void rms_norm_dynamic_per_token_quant_kernel(
     scalar_t const* __restrict__ input,   // [..., hidden_size]
     scalar_t const* __restrict__ weight,  // [hidden_size]
     float const* scale_ub, float const var_epsilon, int32_t const hidden_size,
-    scalar_t* __restrict__ residual = nullptr) {
+    int32_t const input_stride, scalar_t* __restrict__ residual = nullptr) {
   // For vectorization, token_input and token_output pointers need to be
   // aligned at 8-byte and 4-byte addresses respectively.
-  bool const can_vectorize = hidden_size % 4 == 0;
+  bool const can_vectorize = hidden_size % 4 == 0 and input_stride % 4 == 0;
 
   if (can_vectorize) {
     return rms_norm_dynamic_per_token_quant_vec<scalar_t, scalar_out_t,
                                                 has_residual>(
         out, scales, input, weight, scale_ub, var_epsilon, hidden_size,
-        residual);
+        input_stride, residual);
   }
 
   float rms = 0.0f;
   float token_scale = 0.0f;
 
   // Compute RMS
-  vllm::compute_rms<scalar_t, has_residual>(&rms, input, hidden_size,
-                                            var_epsilon, residual);
+  vllm::compute_rms<scalar_t, has_residual>(
+      &rms, input, hidden_size, input_stride, var_epsilon, residual);
   // Compute Scale
   vllm::compute_dynamic_per_token_scales<scalar_t, scalar_out_t, has_residual>(
       &token_scale, scales, input, weight, rms, scale_ub, hidden_size,
-      residual);
+      input_stride, residual);
 
   // RMS Norm + Quant
   if constexpr (std::is_same_v<scalar_out_t, int8_t>) {
     token_scale = 1.0f / token_scale;
     vllm::norm_and_quant<scalar_t, scalar_out_t, true, has_residual>(
-        out, input, weight, rms, &token_scale, hidden_size, residual);
+        out, input, weight, rms, &token_scale, hidden_size, input_stride,
+        residual);
   } else {
     // FP8 - Do not invert s_token_scale for exact match with FBGemm
     vllm::norm_and_quant<scalar_t, scalar_out_t, false, has_residual>(
-        out, input, weight, rms, &token_scale, hidden_size, residual);
+        out, input, weight, rms, &token_scale, hidden_size, input_stride,
+        residual);
   }
 }
 
@@ -97,19 +101,20 @@ __global__ void rms_norm_per_block_quant_kernel(
     scalar_t const* __restrict__ input,   // [..., hidden_size]
     scalar_t const* __restrict__ weight,  // [hidden_size]
     float const* scale_ub, float const var_epsilon, int32_t const hidden_size,
-    scalar_t* __restrict__ residual = nullptr, int64_t outer_scale_stride = 1) {
+    int32_t const input_stride, scalar_t* __restrict__ residual = nullptr,
+    int64_t outer_scale_stride = 1) {
   float rms;
   // Compute RMS
   // Always able to vectorize due to constraints on hidden_size
   vllm::vectorized::compute_rms<scalar_t, has_residual>(
-      &rms, input, hidden_size, var_epsilon, residual);
+      &rms, input, hidden_size, input_stride, var_epsilon, residual);
 
   // Compute Scale
   // Always able to vectorize due to constraints on hidden_size and group_size
   vllm::vectorized::compute_dynamic_per_token_scales<
       scalar_t, scalar_out_t, has_residual, is_scale_transposed, group_size>(
-      nullptr, scales, input, weight, rms, scale_ub, hidden_size, residual,
-      outer_scale_stride);
+      nullptr, scales, input, weight, rms, scale_ub, hidden_size, input_stride,
+      residual, outer_scale_stride);
 
   // RMS Norm + Quant
   // Always able to vectorize due to constraints on hidden_size
@@ -120,7 +125,7 @@ __global__ void rms_norm_per_block_quant_kernel(
   vllm::vectorized::norm_and_quant<
       scalar_t, scalar_out_t, std::is_same_v<scalar_out_t, int8_t>,
       has_residual, is_scale_transposed, group_size>(
-      out, input, weight, rms, scales, hidden_size, residual,
+      out, input, weight, rms, scales, hidden_size, input_stride, residual,
       outer_scale_stride);
 }
 
@@ -137,6 +142,7 @@ void rms_norm_dynamic_per_token_quant_dispatch(
     std::optional<at::Tensor> const& scale_ub,
     std::optional<at::Tensor>& residual) {
   int32_t hidden_size = input.size(-1);
+  int32_t input_stride = input.view({-1, hidden_size}).stride(0);
   auto num_tokens = input.numel() / hidden_size;
 
   dim3 grid(num_tokens);
@@ -153,7 +159,7 @@ void rms_norm_dynamic_per_token_quant_dispatch(
                   out.data_ptr<scalar_t>(), scales.data_ptr<float>(),
                   input.data_ptr<scalar_in_t>(), weight.data_ptr<scalar_in_t>(),
                   scale_ub.has_value() ? scale_ub->data_ptr<float>() : nullptr,
-                  var_epsilon, hidden_size,
+                  var_epsilon, hidden_size, input_stride,
                   has_residual ? residual->data_ptr<scalar_in_t>() : nullptr);
         });
   });
@@ -170,7 +176,9 @@ void rms_norm_dynamic_per_token_quant(
                                         ? c10::ScalarType::Float8_e4m3fn
                                         : c10::ScalarType::Float8_e4m3fnuz;
   TORCH_CHECK(out.dtype() == kFp8Type || out.dtype() == torch::kInt8);
-  TORCH_CHECK(out.is_contiguous() && input.is_contiguous());
+  TORCH_CHECK(out.is_contiguous());
+  TORCH_CHECK(input.stride(-1) == 1,
+              "Input must be contiguous in the last dimension");
 
   if (scale_ub.has_value()) {
     TORCH_CHECK(out.dtype() == kFp8Type);
@@ -179,6 +187,7 @@ void rms_norm_dynamic_per_token_quant(
   TORCH_CHECK(scales.dtype() == torch::kFloat32);
   if (residual) {
     TORCH_CHECK(residual->scalar_type() == input.scalar_type());
+    TORCH_CHECK(residual->is_contiguous());
   }
 
   VLLM_DISPATCH_FLOATING_TYPES(
@@ -200,6 +209,15 @@ void rms_norm_per_block_quant_dispatch(
     std::optional<at::Tensor> const& scale_ub,
     std::optional<at::Tensor>& residual, bool is_scale_transposed) {
   int32_t hidden_size = input.size(-1);
+  int32_t input_stride = input.view({-1, hidden_size}).stride(0);
+
+  TORCH_CHECK(hidden_size % 4 == 0,
+              "Hidden size must be divisible by 4 for vectorized access");
+  TORCH_CHECK(input_stride % 4 == 0,
+              "Input stride must be divisible by 4 for vectorized access");
+  TORCH_CHECK(group_size % 4 == 0,
+              "Group size must be divisible by 4 for vectorized access");
+
   auto num_tokens = input.numel() / hidden_size;
 
   dim3 grid(num_tokens);
@@ -225,7 +243,7 @@ void rms_norm_per_block_quant_dispatch(
                             weight.data_ptr<scalar_in_t>(),
                             scale_ub.has_value() ? scale_ub->data_ptr<float>()
                                                  : nullptr,
-                            var_epsilon, hidden_size,
+                            var_epsilon, hidden_size, input_stride,
                             has_residual ? residual->data_ptr<scalar_in_t>()
                                          : nullptr,
                             scales.stride(1));
@@ -246,7 +264,9 @@ void rms_norm_per_block_quant(torch::Tensor& out, torch::Tensor const& input,
                                         ? c10::ScalarType::Float8_e4m3fn
                                         : c10::ScalarType::Float8_e4m3fnuz;
   TORCH_CHECK(out.dtype() == kFp8Type || out.dtype() == torch::kInt8);
-  TORCH_CHECK(out.is_contiguous() && input.is_contiguous());
+  TORCH_CHECK(out.is_contiguous());
+  TORCH_CHECK(input.stride(-1) == 1,
+              "Input must be contiguous in the last dimension");
 
   if (scale_ub.has_value()) {
     TORCH_CHECK(out.dtype() == kFp8Type);
@@ -255,6 +275,7 @@ void rms_norm_per_block_quant(torch::Tensor& out, torch::Tensor const& input,
   TORCH_CHECK(scales.dtype() == torch::kFloat32);
   if (residual) {
     TORCH_CHECK(residual->scalar_type() == input.scalar_type());
+    TORCH_CHECK(residual->is_contiguous());
   }
 
   TORCH_CHECK(group_size == 128 || group_size == 64,

csrc/quantization/fused_kernels/layernorm_utils.cuh

@@ -16,14 +16,17 @@ namespace vllm {
 // has_residual must be true, if residual is not a nullptr
 template <typename scalar_t, bool has_residual = false>
 __device__ void compute_rms(float* rms, scalar_t const* __restrict__ input,
-                            int32_t const hidden_size, float const epsilon,
+                            int32_t const hidden_size,
+                            int32_t const input_stride, float const epsilon,
                             scalar_t const* __restrict__ residual = nullptr) {
+  int64_t const input_token_offset =
+      blockIdx.x * static_cast<int64_t>(input_stride);
   int64_t const token_offset = blockIdx.x * static_cast<int64_t>(hidden_size);
   // sum of squares
   float ss = 0.0f;
 
   for (auto i = threadIdx.x; i < hidden_size; i += blockDim.x) {
-    float x = static_cast<float>(input[token_offset + i]);
+    float x = static_cast<float>(input[input_token_offset + i]);
     if constexpr (has_residual) {
       x += static_cast<float>(residual[token_offset + i]);
     }
@@ -73,15 +76,20 @@ __device__ void compute_dynamic_per_token_scales(
     float* __restrict__ token_scale, float* __restrict__ all_token_scales,
     scalar_t const* __restrict__ input, scalar_t const* __restrict__ weight,
     float const rms, float const* __restrict__ scale_ub,
-    int32_t const hidden_size, scalar_t const* __restrict__ residual = nullptr,
+    int32_t const hidden_size, int32_t const input_stride,
+    scalar_t const* __restrict__ residual = nullptr,
     int32_t const group_size = 0, int64_t outer_scale_stride = 1) {
   float block_absmax_val_maybe = 0.0f;
   constexpr scalar_out_t qmax{quant_type_max_v<scalar_out_t>};
   __syncthreads();
+
+  int64_t const input_token_offset =
+      blockIdx.x * static_cast<int64_t>(input_stride);
+  int64_t const token_offset = blockIdx.x * static_cast<int64_t>(hidden_size);
+
   if (group_size > 0) {
-    __shared__ float s_max_vals[1024];
-    int64_t const token_offset = blockIdx.x * static_cast<int64_t>(hidden_size);
     int64_t num_groups = hidden_size / group_size;
+    __shared__ float s_max_vals[1024];
     int64_t const threads_per_group = blockDim.x / num_groups;
     int64_t const thread_in_group = threadIdx.x % threads_per_group;
     int64_t const group_offset = threadIdx.x / threads_per_group * group_size;
@@ -89,7 +97,7 @@ __device__ void compute_dynamic_per_token_scales(
     int64_t const thread_end =
         min(group_offset + group_size, static_cast<int64_t>(hidden_size));
     for (auto i = thread_offset; i < thread_end; i += threads_per_group) {
-      float x = static_cast<float>(input[token_offset + i]);
+      float x = static_cast<float>(input[input_token_offset + i]);
       if constexpr (has_residual) {
         x += static_cast<float>(residual[token_offset + i]);
       }
@@ -144,10 +152,8 @@ __device__ void compute_dynamic_per_token_scales(
     }
     __syncthreads();
   } else {
-    int64_t const token_offset = blockIdx.x * static_cast<int64_t>(hidden_size);
-
     for (auto i = threadIdx.x; i < hidden_size; i += blockDim.x) {
-      float x = static_cast<float>(input[token_offset + i]);
+      float x = static_cast<float>(input[input_token_offset + i]);
       if constexpr (has_residual) {
         x += static_cast<float>(residual[token_offset + i]);
       }
@@ -185,12 +191,15 @@ template <typename scalar_t, typename scalar_out_t, bool is_scale_inverted,
 __device__ void norm_and_quant(
     scalar_out_t* __restrict__ output, scalar_t const* __restrict__ input,
     scalar_t const* __restrict__ weight, float const rms, float* const scale,
-    int32_t const hidden_size, scalar_t* __restrict__ residual = nullptr,
-    int32_t const group_size = 0, int64_t outer_scale_stride = 1) {
+    int32_t const hidden_size, int32_t const input_stride,
+    scalar_t* __restrict__ residual = nullptr, int32_t const group_size = 0,
+    int64_t outer_scale_stride = 1) {
+  int64_t const input_token_offset =
+      blockIdx.x * static_cast<int64_t>(input_stride);
   int64_t const token_offset = blockIdx.x * static_cast<int64_t>(hidden_size);
 
   for (auto i = threadIdx.x; i < hidden_size; i += blockDim.x) {
-    float x = static_cast<float>(input[token_offset + i]);
+    float x = static_cast<float>(input[input_token_offset + i]);
     if constexpr (has_residual) {
       x += static_cast<float>(residual[token_offset + i]);
       residual[token_offset + i] = static_cast<scalar_t>(x);
@@ -224,13 +233,16 @@ namespace vectorized {
 // hidden_size must be a multiple of 4
 template <typename scalar_t, bool has_residual = false>
 __device__ void compute_rms(float* rms, scalar_t const* __restrict__ input,
-                            int32_t const hidden_size, float const epsilon,
+                            int32_t const hidden_size,
+                            int32_t const input_stride, float const epsilon,
                             scalar_t const* __restrict__ residual = nullptr) {
+  int64_t const input_token_offset =
+      blockIdx.x * static_cast<int64_t>(input_stride);
   int64_t const token_offset = blockIdx.x * static_cast<int64_t>(hidden_size);
 
   // Vectorized input/output to better utilize memory bandwidth.
   vec4_t<scalar_t> const* vec_input =
-      reinterpret_cast<vec4_t<scalar_t> const*>(&input[token_offset]);
+      reinterpret_cast<vec4_t<scalar_t> const*>(&input[input_token_offset]);
   vec4_t<scalar_t> const* vec_residual = nullptr;
   if constexpr (has_residual) {
     vec_residual =
@@ -288,7 +300,8 @@ __device__ void compute_dynamic_per_token_scales(
     float* __restrict__ token_scale, float* __restrict__ all_token_scales,
     scalar_t const* __restrict__ input, scalar_t const* __restrict__ weight,
     float const rms, float const* __restrict__ scale_ub,
-    int32_t const hidden_size, scalar_t const* __restrict__ residual = nullptr,
+    int32_t const hidden_size, int32_t const input_stride,
+    scalar_t const* __restrict__ residual = nullptr,
     int64_t outer_scale_stride = 1) {
   constexpr scalar_out_t qmax{quant_type_max_v<scalar_out_t>};
 
@@ -300,10 +313,13 @@ __device__ void compute_dynamic_per_token_scales(
   vec4_t<scalar_t> const* vec_weight = nullptr;
   vec4_t<scalar_t> const* vec_residual = nullptr;
 
+  int64_t const input_token_offset =
+      blockIdx.x * static_cast<int64_t>(input_stride);
+  int64_t const token_offset = blockIdx.x * static_cast<int64_t>(hidden_size);
+
   if constexpr (group_size > 0) {
     __shared__ float s_max_vals[1024];
 
-    int64_t const token_offset = blockIdx.x * static_cast<int64_t>(hidden_size);
     int64_t const num_groups = hidden_size / group_size;
     int64_t const threads_per_group = blockDim.x / num_groups;
     int64_t const thread_in_group = threadIdx.x % threads_per_group;
@@ -312,7 +328,8 @@ __device__ void compute_dynamic_per_token_scales(
     int64_t const thread_offset = group_offset + thread_in_group;
     int64_t const thread_end = min(group_offset + (group_size >> 2),
                                    static_cast<int64_t>(hidden_size >> 2));
-    vec_input = reinterpret_cast<vec4_t<scalar_t> const*>(&input[token_offset]);
+    vec_input =
+        reinterpret_cast<vec4_t<scalar_t> const*>(&input[input_token_offset]);
     vec_weight = reinterpret_cast<vec4_t<scalar_t> const*>(weight);
     if constexpr (has_residual) {
       vec_residual =
@@ -396,8 +413,8 @@ __device__ void compute_dynamic_per_token_scales(
     __syncthreads();
 
   } else {
-    int64_t const token_offset = blockIdx.x * static_cast<int64_t>(hidden_size);
-    vec_input = reinterpret_cast<vec4_t<scalar_t> const*>(&input[token_offset]);
+    vec_input =
+        reinterpret_cast<vec4_t<scalar_t> const*>(&input[input_token_offset]);
     vec_weight = reinterpret_cast<vec4_t<scalar_t> const*>(weight);
     if constexpr (has_residual) {
       vec_residual =
@@ -462,18 +479,18 @@ __device__ void compute_dynamic_per_token_scales(
 template <typename scalar_t, typename scalar_out_t, bool is_scale_inverted,
           bool has_residual = false, bool is_scale_transposed = false,
           int32_t group_size = 0>
-__device__ void norm_and_quant(scalar_out_t* __restrict__ output,
-                               scalar_t const* __restrict__ input,
-                               scalar_t const* __restrict__ weight,
-                               float const rms, float* const scale,
-                               int32_t const hidden_size,
-                               scalar_t* __restrict__ residual = nullptr,
-                               int64_t outer_scale_stride = 1) {
+__device__ void norm_and_quant(
+    scalar_out_t* __restrict__ output, scalar_t const* __restrict__ input,
+    scalar_t const* __restrict__ weight, float const rms, float* const scale,
+    int32_t const hidden_size, int32_t const input_stride,
+    scalar_t* __restrict__ residual = nullptr, int64_t outer_scale_stride = 1) {
+  int64_t const input_token_offset =
+      blockIdx.x * static_cast<int64_t>(input_stride);
   int64_t const token_offset = blockIdx.x * static_cast<int64_t>(hidden_size);
 
   // Vectorized input/output/weight/residual to better utilize memory bandwidth.
   vec4_t<scalar_t> const* vec_input =
-      reinterpret_cast<vec4_t<scalar_t> const*>(&input[token_offset]);
+      reinterpret_cast<vec4_t<scalar_t> const*>(&input[input_token_offset]);
   vec4_t<scalar_t> const* vec_weight =
       reinterpret_cast<vec4_t<scalar_t> const*>(weight);
   q8x4_t<scalar_out_t>* vec_output =

csrc/rocm/skinny_gemms.cu

@@ -12,6 +12,7 @@
 #include "../cuda_compat.h"
 #include "dispatch_utils.h"
 #include "quantization/w8a8/fp8/common.cuh"
+#include "core/batch_invariant.hpp"
 
 // TODO(rasmith): The kernels in this file are susceptible to integer overflow
 // issues, do not take strides, and are unable to handle PyTorch tensors that
@@ -1224,17 +1225,14 @@ torch::Tensor wvSplitK(const at::Tensor& in_a, const at::Tensor& in_b,
 #if defined(__gfx950__)
   #define WVSPLITKRC_1KPASS
 template <typename scalar_t, int THRDS, int YTILE, int WvPrGrp, int A_CHUNK,
-          int UNRL, int N, int GrpsShrB, int CHUNKK>
+          int UNRL, int N, int GrpsShrB, int CHUNKK, int DTRMNSTC>
 __global__ void __launch_bounds__(WvPrGrp* THRDS)
     __attribute__((amdgpu_waves_per_eu(1, 1)))
-    wvSplitKrc_(const int actlN, const int K, const int M, const int Bx,
-                const int By, const scalar_t* __restrict__ B,
-                const scalar_t* __restrict__ A,
-                const scalar_t* __restrict__ BIAS, float* glbl, scalar_t* C,
-                const int CuCount) {
-  // Use upper half of glbl buffer for atomic reduce counting
-  int* cntr = (int*)(&glbl[M * N]);
-
+    wvSplitKrc_(const int actlN, const int K, const int Kap, const int M,
+                const int Bx, const int By, const scalar_t* __restrict__ A,
+                const scalar_t* __restrict__ B,
+                const scalar_t* __restrict__ BIAS, float* glbl, int* cntr,
+                scalar_t* C, const int CuCount) {
   constexpr int NTILE = 16;
   constexpr int APAD = 1;
   constexpr int ASTRD = 64;
@@ -1425,11 +1423,11 @@ __global__ void __launch_bounds__(WvPrGrp* THRDS)
           unsigned int kOffcp = min__(K - A_CHUNK, k_str + kOff);
           for (unsigned int n = 0; n < N; n += CHUNKK * sprdN) {
             __builtin_amdgcn_global_load_lds(
-                (int*)(&A[min__(
-                    K * actlN - A_CHUNK,
-                    kOffcp + K * (n / CHUNKK +
-                                  (N / CHUNKK) * (threadIdx.x / (64 / CHUNKK)) +
-                                  (threadIdx.y % sprdN)))]),
+                (int*)(&A[min__(Kap * actlN - A_CHUNK,
+                                kOffcp + Kap * (n / CHUNKK +
+                                                (N / CHUNKK) * (threadIdx.x /
+                                                                (64 / CHUNKK)) +
+                                                (threadIdx.y % sprdN)))]),
                 (int*)(&s[(k +
                            kFitPdd * ((n / CHUNKK) + (threadIdx.y % sprdN)))]),
                 16, 0, 0);
@@ -1533,45 +1531,98 @@ __global__ void __launch_bounds__(WvPrGrp* THRDS)
     }
   }
 
+  union flt4 {
+    scalar8 s8;
+    float2 f2[2];
+    float4 f4;
+  };
   if (m + (threadIdx.x % 16) < M) {
     int my_cntr;
     int mindx = m + (threadIdx.x % 16);
     int g_mindx = m * 4 + (threadIdx.x % 64);  // coalesced atomic reduction
     scalar_t biases[N / NTILE / GrpsShrB][4] = {};
     // Atomic add the output, read biases
-    for (uint32_t nt = 0; nt < N / NTILE / GrpsShrB; nt++)
-      for (uint32_t j = 0; j < 4; j++) {
-        // int nindx = (j + (threadIdx.x / 16) * 4) + nt * NTILE +
-        //             (N / GrpsShrB) * (threadIdx.y % GrpsShrB);
-        // int adr = mindx + M * nindx;
-        int g_nindx =
-            j + (nt * NTILE + (N / GrpsShrB) * (threadIdx.y % GrpsShrB)) / 4;
-        int g_adr = g_mindx + M * g_nindx * 4;
-        atomicAdd(&glbl[g_adr], sum4[nt][0][j]);
+    for (uint32_t nt = 0; nt < N / NTILE / GrpsShrB; nt++) {
+      int g_nindx =
+          (nt * NTILE + (N / GrpsShrB) * (threadIdx.y % GrpsShrB)) / 4;
+      int g_adr = g_mindx * 4 + 0 + M * g_nindx * 4;
+      if (DTRMNSTC) {
+        flt4 flt4_ = {.s8 = sum4[nt][0]};
+        __hip_atomic_store((float2*)&glbl[g_adr + M * N * (m0 / Mmod)],
+                           flt4_.f2[0], __ATOMIC_RELAXED,
+                           __HIP_MEMORY_SCOPE_AGENT);
+        __hip_atomic_store((float2*)&glbl[g_adr + 2 + M * N * (m0 / Mmod)],
+                           flt4_.f2[1], __ATOMIC_RELAXED,
+                           __HIP_MEMORY_SCOPE_AGENT);
+      } else {
+        for (uint32_t j = 0; j < 4; j++)
+          atomicAdd((&glbl[g_adr + j]), sum4[nt][0][j]);
       }
+    }
+
+    __atomic_signal_fence(__ATOMIC_SEQ_CST);
+    asm volatile("s_waitcnt vmcnt(0)" ::: "memory");
+    __atomic_signal_fence(__ATOMIC_SEQ_CST);
+
     int nindx_ = (0 + (threadIdx.x / 16) * 4) + 0 * NTILE +
                  (N / GrpsShrB) * (threadIdx.y % GrpsShrB);
     int adr_ = mindx + M * nindx_ / 4;
-    // Update the complete counter
     my_cntr = atomicAdd(&cntr[adr_], 1);
-    float vals[N / NTILE / GrpsShrB][4] = {};
+
+    // make sure LDS is free for write out staging
+    if (DTRMNSTC) __syncthreads();
+
+    // Update the complete counter
+    flt4 vals[N / NTILE / GrpsShrB] = {};
     // If we're the last k-shard, read back the value and convert...
     if (my_cntr + 1 == k_rnd) {
-      if (BIAS)
-        for (uint32_t nt = 0; nt < N / NTILE / GrpsShrB; nt++) {
-          for (uint32_t j = 0; j < 4; j++) {
-            int nindx = (j + (threadIdx.x / 16) * 4) + nt * NTILE +
-                        (N / GrpsShrB) * (threadIdx.y % GrpsShrB);
-            biases[nt][j] = BIAS[(mindx % Bx) + (nindx % By) * Bx];
+      cntr[adr_] = 0;  // clear for next round
+      if constexpr (DTRMNSTC) {
+  #pragma unroll
+        for (int ks = 0; ks < k_rnd; ks++) {
+          for (uint32_t nt = 0; nt < N / NTILE / GrpsShrB; nt++) {
+            int g_nindx =
+                (nt * NTILE + (N / GrpsShrB) * (threadIdx.y % GrpsShrB)) / 4;
+            int g_adr = g_mindx * 4 + 0 + M * g_nindx * 4;
+            __builtin_amdgcn_global_load_lds(
+                (float4*)(&glbl[g_adr + M * N * ks]),
+                &(((float4*)s)[(threadIdx.y * THRDS) + ks * THRDS * 4 +
+                               nt * THRDS * 4 * k_rnd]),
+                16, 0, 0);
           }
         }
-      for (uint32_t nt = 0; nt < N / NTILE / GrpsShrB; nt++) {
-        for (uint32_t j = 0; j < 4; j++) {
-          int g_nindx =
-              j + (nt * NTILE + (N / GrpsShrB) * (threadIdx.y % GrpsShrB)) / 4;
-          int g_adr = g_mindx + M * g_nindx * 4;
-          vals[nt][j] = glbl[g_adr];
+        if (BIAS)
+          for (uint32_t nt = 0; nt < N / NTILE / GrpsShrB; nt++) {
+            for (uint32_t j = 0; j < 4; j++) {
+              int nindx = (j + (threadIdx.x / 16) * 4) + nt * NTILE +
+                          (N / GrpsShrB) * (threadIdx.y % GrpsShrB);
+              biases[nt][j] = BIAS[(mindx % Bx) + (nindx % By) * Bx];
+            }
+          }
+        asm volatile("s_waitcnt 0");
+        for (int ks = 0; ks < k_rnd; ks++) {
+          for (uint32_t nt = 0; nt < N / NTILE / GrpsShrB; nt++) {
+            float4 eval = ((float4*)s)[(threadIdx.x + threadIdx.y * THRDS) +
+                                       ks * THRDS * 4 + nt * THRDS * 4 * k_rnd];
+            vals[nt].f4 += eval;
+          }
         }
+      } else {
+        for (uint32_t nt = 0; nt < N / NTILE / GrpsShrB; nt++) {
+          int g_nindx =
+              (nt * NTILE + (N / GrpsShrB) * (threadIdx.y % GrpsShrB)) / 4;
+          int g_adr = g_mindx * 4 + 0 + M * g_nindx * 4;
+          vals[nt].f4 = *(float4*)(&glbl[g_adr]);
+          *(float4*)(&glbl[g_adr]) = {};  // clear out for next round
+        }
+        if (BIAS)
+          for (uint32_t nt = 0; nt < N / NTILE / GrpsShrB; nt++) {
+            for (uint32_t j = 0; j < 4; j++) {
+              int nindx = (j + (threadIdx.x / 16) * 4) + nt * NTILE +
+                          (N / GrpsShrB) * (threadIdx.y % GrpsShrB);
+              biases[nt][j] = BIAS[(mindx % Bx) + (nindx % By) * Bx];
+            }
+          }
       }
       __builtin_amdgcn_sched_barrier(0);
       for (uint32_t nt = 0; nt < N / NTILE / GrpsShrB; nt++) {
@@ -1581,11 +1632,11 @@ __global__ void __launch_bounds__(WvPrGrp* THRDS)
           if (nindx < actlN) {
             int adr = mindx + M * nindx;
             if constexpr (std::is_same_v<scalar_t, __hip_bfloat16>) {
-              vals[nt][j] += __bfloat162float(biases[nt][j]);
-              C[adr] = __float2bfloat16(vals[nt][j]);
+              vals[nt].s8[j] += __bfloat162float(biases[nt][j]);
+              C[adr] = __float2bfloat16(vals[nt].s8[j]);
             } else {
-              vals[nt][j] += __half2float(biases[nt][j]);
-              C[adr] = __float2half(vals[nt][j]);
+              vals[nt].s8[j] += __half2float(biases[nt][j]);
+              C[adr] = __float2half(vals[nt].s8[j]);
             }
           }
         }
@@ -1604,21 +1655,25 @@ __global__ void __launch_bounds__(WvPrGrp* THRDS)
 }
 #else   // !defined(__HIP__GFX9__) TODO: Add NAVI support
 template <typename scalar_t, int THRDS, int YTILE, int WvPrGrp, int A_CHUNK,
-          int UNRL, int N, int GrpsShrB, int CHUNKK>
-__global__ void wvSplitKrc_(const int actlN, const int K, const int M,
-                            const int Bx, const int By, const scalar_t* B,
-                            const scalar_t* __restrict__ A,
+          int UNRL, int N, int GrpsShrB, int CHUNKK, int DTRMNSTC>
+__global__ void wvSplitKrc_(const int actlN, const int K, const int Kap,
+                            const int M, const int Bx, const int By,
+                            const scalar_t* B, const scalar_t* __restrict__ A,
                             const scalar_t* __restrict__ BIAS, float* glbl,
-                            // int* cntr,
-                            scalar_t* C, const int CuCount){UNREACHABLE_CODE}
+                            int* cntr, scalar_t* C,
+                            const int CuCount){UNREACHABLE_CODE}
 #endif  // defined(__HIP__GFX9__) TODO: Add NAVI support
 
 torch::Tensor wvSplitKrc(const at::Tensor& in_a, const at::Tensor& in_b,
                          const std::optional<at::Tensor>& in_bias,
                          const int64_t CuCount) {
-  auto M_in = in_a.size(0);
-  auto N_in = in_b.size(0);
-  auto K_in = in_a.size(1);
+  int _DTRMNSTC = 1;  // vllm::vllm_is_batch_invariant();
+
+  auto M_in = in_b.size(0);
+  auto N_in = in_a.size(0);
+  auto K_in = in_b.size(1);
+  auto Kap_in = in_a.stride(0);
+
   auto Bx_in =
       (in_bias.has_value() && in_bias->numel() > 0)
           ? (in_bias->sizes().size() == 2) ? in_bias->size(1) : in_bias->size(0)
@@ -1635,13 +1690,9 @@ torch::Tensor wvSplitKrc(const at::Tensor& in_a, const at::Tensor& in_b,
 
   auto out_c = torch::empty(
       {N_in, M_in},
-      torch::TensorOptions().dtype(in_b.dtype()).device(in_b.device()));
+      torch::TensorOptions().dtype(in_a.dtype()).device(in_a.device()));
 
   auto N_p2 = 1U << (32 - __builtin_clz(N_in - 1));
-  auto axl_glbl = torch::empty(
-      {N_p2 + N_p2 / 4, M_in + M_in / 4},
-      torch::TensorOptions().dtype(torch::kFloat32).device(in_b.device()));
-  axl_glbl.zero_();  // disable for FAST_UNSAFE_RDC_INIT
 
   dim3 grid(CuCount);
 
@@ -1649,55 +1700,70 @@ torch::Tensor wvSplitKrc(const at::Tensor& in_a, const at::Tensor& in_b,
   const cudaStream_t stream = at::cuda::getCurrentCUDAStream();
   // const int max_lds_len = get_lds_size() / 2;
 
+  // With 64 Ms per CU (each of 4 SIMDs working on a 16x16 tile),
+  // and each working on a 512-shard of K, how many CUs would we need?
+  int rndup_cus = ((M_in + 64 - 1) / 64) * ((K_in + 512 - 1) / 512);
+
+  // How many of 4 waves in a group can work on same 16 Ms at same time? First
+  // try to maximize this. This reduces the Ms each group works on, i.e.
+  // increasing the number of CUs needed.
+  int GrpsShrB = min(N_p2 / 16, 4);
+
+  // Given the above, how many CUs would we need?
+  int CuNeeded = rndup_cus * GrpsShrB;
+
+  if (CuNeeded > CuCount) throw std::runtime_error("Invalid wvSplitKrc size");
+
+  // Can we increase SplitK by shrinking the K-shared to 256?
+  int chunkk = (CuNeeded * 2 <= CuCount) ? 2 : 1;
+
+  static torch::Tensor axl_glbl =
+      torch::zeros(
+          128 * 1024 * (_DTRMNSTC ? 12 : 1),
+          torch::TensorOptions().dtype(torch::kFloat32).device(in_a.device()))
+          .detach();
+  static torch::Tensor axl_cntr =
+      torch::zeros(
+          128 * 1024 * (_DTRMNSTC ? 12 : 1) / 4,
+          torch::TensorOptions().dtype(torch::kInt).device(in_a.device()))
+          .detach();
+  auto glbl = axl_glbl.data_ptr<float>();
+  auto cntr = axl_cntr.data_ptr<int>();
+
 #define WVSPLITKrc(_N, _GrpsShrB, _CHUNKK)                                     \
   {                                                                            \
     dim3 block(64, 4);                                                         \
-    wvSplitKrc_<fptype, 64, 16, 4, 8, 1, _N, _GrpsShrB, _CHUNKK>               \
-        <<<grid, block, 0, stream>>>(N_in, K_in, M_in, Bx_in, By_in, af4, bf4, \
-                                     biasf4, glbl, c, CuCount);                \
+    if (_DTRMNSTC)                                                             \
+      wvSplitKrc_<fptype, 64, 16, 4, 8, 1, _N, _GrpsShrB, _CHUNKK, 1>          \
+          <<<grid, block, 0, stream>>>(N_in, K_in, Kap_in, M_in, Bx_in, By_in, \
+                                       af4, bf4, biasf4, glbl, cntr, c,        \
+                                       CuCount);                               \
+    else                                                                       \
+      wvSplitKrc_<fptype, 64, 16, 4, 8, 1, _N, _GrpsShrB, _CHUNKK, 0>          \
+          <<<grid, block, 0, stream>>>(N_in, K_in, Kap_in, M_in, Bx_in, By_in, \
+                                       af4, bf4, biasf4, glbl, cntr, c,        \
+                                       CuCount);                               \
   }
 
-  AT_DISPATCH_REDUCED_FLOATING_TYPES(in_b.scalar_type(), "wvSplitKrc", [&] {
+  AT_DISPATCH_REDUCED_FLOATING_TYPES(in_a.scalar_type(), "wvSplitKrc", [&] {
     using fptype = typename scalar<scalar_t>::type;
-    fptype* af4 = reinterpret_cast<fptype*>(in_a.data_ptr());
+    const fptype* af4 = reinterpret_cast<const fptype*>(in_a.data_ptr());
     const fptype* bf4 = reinterpret_cast<const fptype*>(in_b.data_ptr());
     const fptype* biasf4 =
         (in_bias.has_value() && in_bias->numel() > 0)
             ? reinterpret_cast<const fptype*>(in_bias->data_ptr())
             : nullptr;
     fptype* c = reinterpret_cast<fptype*>(out_c.data_ptr());
-    auto glbl = axl_glbl.data_ptr<float>();
-
-    // With 64 Ms per CU (each of 4 SIMDs working on a 16x16 tile),
-    // and each working on a 512-shard of K, how many CUs would we need?
-    int rndup_cus = ((M_in + 64 - 1) / 64) * ((K_in + 512 - 1) / 512);
-
-    // How many of 4 waves in a group can work on same 16 Ms at same time? First
-    // try to maximize this. This reduces the Ms each group works on, i.e.
-    // increasing the number of CUs needed.
-    int GrpsShrB = min(N_p2 / 16, 4);
-
-    // Given the above, how many CUs would we need?
-    int CuNeeded = rndup_cus * GrpsShrB;
-
-    if (CuNeeded > CuCount) std::runtime_error("Invalid wvSplitKrc size");
-
-    // Can we increase SplitK by shrinking the K-shared to 256?
-    int chunkk = (CuNeeded * 2 <= CuCount) ? 2 : 1;
 
     switch (N_p2) {
       case 16:
         WVSPLITKrc(16, 1, 1) break;
       case 32:
-        if (chunkk == 2)
-          WVSPLITKrc(32, 2, 2) else if (chunkk == 1) WVSPLITKrc(32, 2, 1) break;
+        if (chunkk == 2) WVSPLITKrc(32, 2, 2) else WVSPLITKrc(32, 2, 1) break;
       case 64:
-        if (chunkk == 2)
-          WVSPLITKrc(64, 4, 2) else if (chunkk == 1) WVSPLITKrc(64, 4, 1) break;
+        if (chunkk == 2) WVSPLITKrc(64, 4, 2) else WVSPLITKrc(64, 4, 1) break;
       case 128:
-        if (chunkk == 2)
-          WVSPLITKrc(128, 4, 2) else if (chunkk == 1)
-              WVSPLITKrc(128, 4, 1) break;
+        if (chunkk == 2) WVSPLITKrc(128, 4, 2) else WVSPLITKrc(128, 4, 1) break;
       default:
         throw std::runtime_error(
             "Unsupported N value: " + std::to_string(M_in) + "," +

csrc/sampler.cu

@@ -575,7 +575,7 @@ static __global__ __launch_bounds__(kNumThreadsPerBlock) void topKPerRowDecode(
   // The range of logits within the row.
   int rowStart = 0;
   int seq_len = seqLens[rowIdx / next_n];
-  int rowEnd = seq_len - next_n + (rowIdx % next_n) + 1;
+  int rowEnd = max(0, seq_len - next_n + (rowIdx % next_n) + 1);
 
   // Local pointers to this block
   if constexpr (!multipleBlocksPerRow && !mergeBlocks) {

csrc/torch_bindings.cpp

@@ -564,10 +564,21 @@ TORCH_LIBRARY_EXPAND(TORCH_EXTENSION_NAME, ops) {
 
   // Compute NVFP4 block quantized tensor.
   ops.def(
-      "scaled_fp4_quant(Tensor! output, Tensor input,"
-      "                 Tensor! output_scale, Tensor input_scale, bool "
-      "is_sf_swizzled_layout) -> ()");
-  ops.impl("scaled_fp4_quant", torch::kCUDA, &scaled_fp4_quant);
+      "scaled_fp4_quant(Tensor input,"
+      "                 Tensor input_scale, bool "
+      "is_sf_swizzled_layout) -> (Tensor, Tensor)");
+  ops.impl("scaled_fp4_quant", torch::kCUDA, &scaled_fp4_quant_func);
+
+  // Out variant
+  // TODO: Add {at::Tag::out_variant} tag and update all call sites
+  // to use the functional variant once vLLM upgrades PyTorch.
+  // See pytorch/pytorch#176117.
+  ops.def(
+      "scaled_fp4_quant.out(Tensor input,"
+      "                     Tensor input_scale, bool "
+      "is_sf_swizzled_layout, *, Tensor(a!) output, Tensor(b!) output_scale) "
+      "-> ()");
+  ops.impl("scaled_fp4_quant.out", torch::kCUDA, &scaled_fp4_quant_out);
 
   // Compute NVFP4 experts quantization.
   ops.def(
@@ -802,6 +813,10 @@ TORCH_LIBRARY_EXPAND(CONCAT(TORCH_EXTENSION_NAME, _cache_ops), cache_ops) {
   cache_ops.impl("indexer_k_quant_and_cache", torch::kCUDA,
                  &indexer_k_quant_and_cache);
 
+  cache_ops.def(
+      "concat_mla_q(Tensor ql_nope, Tensor q_pe, Tensor! q_out) -> ()");
+  cache_ops.impl("concat_mla_q", torch::kCUDA, &concat_mla_q);
+
   cache_ops.def(
       "cp_gather_indexer_k_quant_cache(Tensor kv_cache, Tensor! dst_k, Tensor! "
       "dst_scale, Tensor block_table, Tensor cu_seq_lens) -> ()");

docker/Dockerfile

@@ -586,7 +586,7 @@ RUN --mount=type=cache,target=/root/.cache/uv \
 # This is ~1.1GB and only changes when FlashInfer version bumps
 # https://docs.flashinfer.ai/installation.html
 # From versions.json: .flashinfer.version
-ARG FLASHINFER_VERSION=0.6.4
+ARG FLASHINFER_VERSION=0.6.6
 RUN --mount=type=cache,target=/root/.cache/uv \
     uv pip install --system flashinfer-cubin==${FLASHINFER_VERSION} \
     && uv pip install --system flashinfer-jit-cache==${FLASHINFER_VERSION} \
@@ -620,7 +620,7 @@ RUN set -eux; \
 ARG BITSANDBYTES_VERSION_X86=0.46.1
 ARG BITSANDBYTES_VERSION_ARM64=0.42.0
 ARG TIMM_VERSION=">=1.0.17"
-ARG RUNAI_MODEL_STREAMER_VERSION=">=0.15.3"
+ARG RUNAI_MODEL_STREAMER_VERSION=">=0.15.7"
 RUN --mount=type=cache,target=/root/.cache/uv \
     if [ "$TARGETPLATFORM" = "linux/arm64" ]; then \
         BITSANDBYTES_VERSION="${BITSANDBYTES_VERSION_ARM64}"; \
@@ -628,7 +628,7 @@ RUN --mount=type=cache,target=/root/.cache/uv \
         BITSANDBYTES_VERSION="${BITSANDBYTES_VERSION_X86}"; \
     fi; \
     uv pip install --system accelerate hf_transfer modelscope \
-        "bitsandbytes>=${BITSANDBYTES_VERSION}" "timm${TIMM_VERSION}" "runai-model-streamer[s3,gcs]${RUNAI_MODEL_STREAMER_VERSION}"
+        "bitsandbytes>=${BITSANDBYTES_VERSION}" "timm${TIMM_VERSION}" "runai-model-streamer[s3,gcs,azure]${RUNAI_MODEL_STREAMER_VERSION}"
 
 # ============================================================
 # VLLM INSTALLATION (depends on build stage)

docker/Dockerfile.cpu

@@ -9,17 +9,13 @@
 #
 # Build targets:
 #   vllm-openai (default): used for serving deployment
+#   vllm-openai-zen: vLLM from source + zentorch from PyPI via vllm[zen]
 #   vllm-test: used for CI tests
 #   vllm-dev: used for development
 #
 # Build arguments:
 #   PYTHON_VERSION=3.13|3.12 (default)|3.11|3.10
-#   VLLM_CPU_DISABLE_AVX512=false (default)|true
-#   VLLM_CPU_AVX2=false (default)|true (for cross-compilation)
-#   VLLM_CPU_AVX512=false (default)|true (for cross-compilation)
-#   VLLM_CPU_AVX512BF16=false (default)|true (for cross-compilation)
-#   VLLM_CPU_AVX512VNNI=false (default)|true (for cross-compilation)
-#   VLLM_CPU_AMXBF16=false (default)|true (for cross-compilation)
+#   VLLM_CPU_X86=false (default)|true (for cross-compilation)
 #   VLLM_CPU_ARM_BF16=false (default)|true (for cross-compilation)
 #
 
@@ -36,7 +32,7 @@ RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
     --mount=type=cache,target=/var/lib/apt,sharing=locked \
     apt-get update -y \
     && apt-get install -y --no-install-recommends sudo ccache git curl wget ca-certificates \
-    gcc-12 g++-12 libtcmalloc-minimal4 libnuma-dev ffmpeg libsm6 libxext6 libgl1 jq lsof \
+    gcc-12 g++-12 libtcmalloc-minimal4 libnuma-dev ffmpeg libsm6 libxext6 libgl1 jq lsof make xz-utils \
     && update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-12 10 --slave /usr/bin/g++ g++ /usr/bin/g++-12 \
     && curl -LsSf https://astral.sh/uv/install.sh | sh
 
@@ -91,24 +87,9 @@ ARG max_jobs=32
 ENV MAX_JOBS=${max_jobs}
 
 ARG GIT_REPO_CHECK=0
-# Support for building with non-AVX512 vLLM: docker build --build-arg VLLM_CPU_DISABLE_AVX512="true" ...
-ARG VLLM_CPU_DISABLE_AVX512=0
-ENV VLLM_CPU_DISABLE_AVX512=${VLLM_CPU_DISABLE_AVX512}
-# Support for cross-compilation with AVX2 ISA: docker build --build-arg VLLM_CPU_AVX2="1" ...
-ARG VLLM_CPU_AVX2=0
-ENV VLLM_CPU_AVX2=${VLLM_CPU_AVX2}
-# Support for cross-compilation with AVX512 ISA: docker build --build-arg VLLM_CPU_AVX512="1" ...
-ARG VLLM_CPU_AVX512=0
-ENV VLLM_CPU_AVX512=${VLLM_CPU_AVX512}
-# Support for building with AVX512BF16 ISA: docker build --build-arg VLLM_CPU_AVX512BF16="true" ...
-ARG VLLM_CPU_AVX512BF16=0
-ENV VLLM_CPU_AVX512BF16=${VLLM_CPU_AVX512BF16}
-# Support for building with AVX512VNNI ISA: docker build --build-arg VLLM_CPU_AVX512VNNI="true" ...
-ARG VLLM_CPU_AVX512VNNI=0
-ENV VLLM_CPU_AVX512VNNI=${VLLM_CPU_AVX512VNNI}
-# Support for building with AMXBF16 ISA: docker build --build-arg VLLM_CPU_AMXBF16="true" ...
-ARG VLLM_CPU_AMXBF16=1
-ENV VLLM_CPU_AMXBF16=${VLLM_CPU_AMXBF16}
+# Support for cross-compilation with x86 ISA including AVX2 and AVX512: docker build --build-arg VLLM_CPU_X86="true" ...
+ARG VLLM_CPU_X86=0
+ENV VLLM_CPU_X86=${VLLM_CPU_X86}
 # Support for cross-compilation with ARM BF16 ISA: docker build --build-arg VLLM_CPU_ARM_BF16="true" ...
 ARG VLLM_CPU_ARM_BF16=0
 ENV VLLM_CPU_ARM_BF16=${VLLM_CPU_ARM_BF16}
@@ -116,7 +97,7 @@ ENV VLLM_CPU_ARM_BF16=${VLLM_CPU_ARM_BF16}
 WORKDIR /vllm-workspace
 
 # Validate build arguments - prevent mixing incompatible ISA flags
-RUN if [ "$TARGETARCH" = "arm64" ] && { [ "$VLLM_CPU_AVX2" != "0" ] || [ "$VLLM_CPU_AVX512" != "0" ] || [ "$VLLM_CPU_AVX512BF16" != "0" ] || [ "$VLLM_CPU_AVX512VNNI" != "0" ]; }; then \
+RUN if [ "$TARGETARCH" = "arm64" ] && [ "$VLLM_CPU_X86" != "0" ]; then \
         echo "ERROR: Cannot use x86-specific ISA flags (AVX2, AVX512, etc.) when building for ARM64 (--platform=linux/arm64)"; \
         exit 1; \
     fi && \
@@ -174,7 +155,7 @@ WORKDIR /vllm-workspace
 
 RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
     --mount=type=cache,target=/var/lib/apt,sharing=locked \
-    apt-get install -y --no-install-recommends vim numactl xz-utils make clangd-14
+    apt-get install -y --no-install-recommends vim numactl clangd-14
 
 RUN ln -s /usr/bin/clangd-14 /usr/bin/clangd
 
@@ -232,23 +213,29 @@ LABEL org.opencontainers.image.source="https://github.com/vllm-project/vllm"
 
 # Build configuration labels
 ARG TARGETARCH
-ARG VLLM_CPU_DISABLE_AVX512
-ARG VLLM_CPU_AVX2
-ARG VLLM_CPU_AVX512
-ARG VLLM_CPU_AVX512BF16
-ARG VLLM_CPU_AVX512VNNI
-ARG VLLM_CPU_AMXBF16
+ARG VLLM_CPU_X86
 ARG VLLM_CPU_ARM_BF16
 ARG PYTHON_VERSION
 
 LABEL ai.vllm.build.target-arch="${TARGETARCH}"
-LABEL ai.vllm.build.cpu-disable-avx512="${VLLM_CPU_DISABLE_AVX512:-false}"
-LABEL ai.vllm.build.cpu-avx2="${VLLM_CPU_AVX2:-false}"
-LABEL ai.vllm.build.cpu-avx512="${VLLM_CPU_AVX512:-false}"
-LABEL ai.vllm.build.cpu-avx512bf16="${VLLM_CPU_AVX512BF16:-false}"
-LABEL ai.vllm.build.cpu-avx512vnni="${VLLM_CPU_AVX512VNNI:-false}"
-LABEL ai.vllm.build.cpu-amxbf16="${VLLM_CPU_AMXBF16:-false}"
+LABEL ai.vllm.build.cpu-x86="${VLLM_CPU_X86:-false}"
 LABEL ai.vllm.build.cpu-arm-bf16="${VLLM_CPU_ARM_BF16:-false}"
 LABEL ai.vllm.build.python-version="${PYTHON_VERSION:-3.12}"
 
 ENTRYPOINT ["vllm", "serve"]
+
+
+######################### ZEN CPU PYPI IMAGE #########################
+FROM vllm-openai AS vllm-openai-zen
+
+ARG TARGETARCH
+
+RUN if [ "$TARGETARCH" != "amd64" ]; then \
+        echo "ERROR: vllm-openai-amd only supports --platform=linux/amd64"; \
+        exit 1; \
+    fi
+
+RUN --mount=type=cache,target=/root/.cache/uv \
+    uv pip install "vllm[zen]"
+
+ENTRYPOINT ["vllm", "serve"]

docker/Dockerfile.nightly_torch

@@ -217,13 +217,13 @@ RUN pip install setuptools==75.6.0 packaging==23.2 ninja==1.11.1.3 build==1.2.2.
 
 
 # build flashinfer for torch nightly from source around 10 mins
-# release version: v0.6.4
+# release version: v0.6.6
 # todo(elainewy): cache flashinfer build result for faster build
 ENV CCACHE_DIR=/root/.cache/ccache
 RUN --mount=type=cache,target=/root/.cache/ccache \
     --mount=type=cache,target=/root/.cache/uv \
     echo "git clone flashinfer..." \
-    && git clone --depth 1 --branch v0.6.4 --recursive https://github.com/flashinfer-ai/flashinfer.git \
+    && git clone --depth 1 --branch v0.6.6 --recursive https://github.com/flashinfer-ai/flashinfer.git \
     && cd flashinfer \
     && git submodule update --init --recursive \
     && echo "finish git clone flashinfer..." \

docker/Dockerfile.rocm

@@ -184,6 +184,34 @@ RUN cd /opt/rixl && mkdir -p /app/install && \
         --ucx-plugins-dir ${UCX_HOME}/lib/ucx \
         --nixl-plugins-dir ${RIXL_HOME}/lib/x86_64-linux-gnu/plugins
 
+# DeepEP build stage
+FROM base AS build_deep
+ARG ROCSHMEM_BRANCH="ba0bf0f3"
+ARG ROCSHMEM_REPO="https://github.com/ROCm/rocm-systems.git"
+ARG DEEPEP_BRANCH="e84464ec"
+ARG DEEPEP_REPO="https://github.com/ROCm/DeepEP.git"
+ARG DEEPEP_NIC="cx7"
+ENV ROCSHMEM_DIR=/opt/rocshmem
+
+RUN git clone ${ROCSHMEM_REPO} \
+ && cd rocm-systems \
+ && git checkout ${ROCSHMEM_BRANCH} \
+ && mkdir -p projects/rocshmem/build \
+ && cd projects/rocshmem/build \
+ && cmake .. \
+    -DCMAKE_INSTALL_PREFIX="${ROCSHMEM_DIR}" \
+    -DROCM_PATH=/opt/rocm \
+    -DCMAKE_POSITION_INDEPENDENT_CODE=ON \
+    -DUSE_EXTERNAL_MPI=OFF \
+ && make -j \
+ && make install
+
+# Build DeepEP wheel.
+# DeepEP looks for rocshmem at ROCSHMEM_DIR.
+RUN git clone ${DEEPEP_REPO} \
+ && cd DeepEP \
+ && git checkout ${DEEPEP_BRANCH} \
+ && python3 setup.py --variant rocm --nic ${DEEPEP_NIC} bdist_wheel --dist-dir=/app/deep_install
 
 # -----------------------
 # vLLM wheel release build stage (for building distributable wheels)
@@ -305,6 +333,11 @@ RUN --mount=type=bind,from=export_vllm,src=/,target=/install \
 RUN --mount=type=bind,from=build_rixl,src=/app/install,target=/rixl_install \
     uv pip install --system /rixl_install/*.whl
 
+# Install DeepEP wheel
+RUN --mount=type=bind,from=build_deep,src=/app/deep_install,target=/deep_install \
+    uv pip install --system /deep_install/*.whl
+COPY --from=build_deep /opt/rocshmem /opt/rocshmem
+
 # RIXL/MoRIIO runtime dependencies (RDMA userspace libraries)
 RUN apt-get update -q -y && apt-get install -q -y \
     librdmacm1 \

docker/versions.json

@@ -65,7 +65,7 @@
       "default": "true"
     },
     "FLASHINFER_VERSION": {
-      "default": "0.6.4"
+      "default": "0.6.6"
     },
     "GDRCOPY_CUDA_VERSION": {
       "default": "12.8"
@@ -83,7 +83,7 @@
       "default": ">=1.0.17"
     },
     "RUNAI_MODEL_STREAMER_VERSION": {
-      "default": ">=0.15.3"
+      "default": ">=0.15.7"
     }
   }
 }

docs/benchmarking/cli.md

@@ -18,7 +18,7 @@ th {
 </style>
 
 | Dataset | Online | Offline | Data Path |
-|---------|--------|---------|-----------|
+| ------- | ------ | ------- | --------- |
 | ShareGPT | ✅ | ✅ | `wget https://huggingface.co/datasets/anon8231489123/ShareGPT_Vicuna_unfiltered/resolve/main/ShareGPT_V3_unfiltered_cleaned_split.json` |
 | ShareGPT4V (Image) | ✅ | ✅ | `wget https://huggingface.co/datasets/Lin-Chen/ShareGPT4V/resolve/main/sharegpt4v_instruct_gpt4-vision_cap100k.json`<br>Note that the images need to be downloaded separately. For example, to download COCO's 2017 Train images:<br>`wget http://images.cocodataset.org/zips/train2017.zip` |
 | ShareGPT4Video (Video) | ✅ | ✅ | `git clone https://huggingface.co/datasets/ShareGPT4Video/ShareGPT4Video` |
@@ -383,14 +383,14 @@ The `--burstiness` parameter mathematically controls request arrival patterns us
 
 Load Pattern Recommendations by Use Case:
 
-| Use Case           | Burstiness   | Request Rate    | Max Concurrency | Description                                               |
-| ---                | ---          | ---             | ---             | ---                                                       |
+| Use Case           | Burstiness   | Request Rate    | Max Concurrency | Description                                                                        |
+| ---                | ---          | ---             | ---             | ---                                                                                |
 | Maximum Throughput | N/A          | Infinite        | Limited         | **Most common**: Simulates load balancer/gateway limits with unlimited user demand |
-| Realistic Testing  | 1.0          | Moderate (5-20) | Infinite        | Natural Poisson traffic patterns for baseline performance |
-| Stress Testing     | 0.1-0.5      | High (20-100)   | Infinite        | Challenging burst patterns to test resilience             |
-| Latency Profiling  | 2.0-5.0      | Low (1-10)      | Infinite        | Uniform load for consistent timing analysis               |
-| Capacity Planning  | 1.0          | Variable        | Limited         | Test resource limits with realistic constraints           |
-| SLA Validation     | 1.0          | Target rate     | SLA limit       | Production-like constraints for compliance testing        |
+| Realistic Testing  | 1.0          | Moderate (5-20) | Infinite        | Natural Poisson traffic patterns for baseline performance                          |
+| Stress Testing     | 0.1-0.5      | High (20-100)   | Infinite        | Challenging burst patterns to test resilience                                      |
+| Latency Profiling  | 2.0-5.0      | Low (1-10)      | Infinite        | Uniform load for consistent timing analysis                                        |
+| Capacity Planning  | 1.0          | Variable        | Limited         | Test resource limits with realistic constraints                                    |
+| SLA Validation     | 1.0          | Target rate     | SLA limit       | Production-like constraints for compliance testing                                 |
 
 These load patterns help evaluate different aspects of your vLLM deployment, from basic performance characteristics to resilience under challenging traffic conditions.
 
@@ -941,7 +941,7 @@ Benchmark per-stage latency of the multimodal (MM) input processor pipeline, inc
 The benchmark measures the following stages for each request:
 
 | Stage | Description |
-|-------|-------------|
+| ----- | ----------- |
 | `get_mm_hashes_secs` | Time spent hashing multimodal inputs |
 | `get_cache_missing_items_secs` | Time spent looking up the processor cache |
 | `apply_hf_processor_secs` | Time spent in the HuggingFace processor |

docs/benchmarking/dashboard.md

@@ -39,6 +39,12 @@ When run, benchmark script generates results under **benchmark/results** folder,
 - `THROUGHPUT_JSON`: JSON file to use for the throughout tests. Default value is empty string (use default file).
 - `REMOTE_HOST`: IP for the remote vLLM service to benchmark. Default value is empty string.
 - `REMOTE_PORT`: Port for the remote vLLM service to benchmark. Default value is empty string.
+- `PROMPTS_PER_CONCURRENCY`: Multiplier to compute `num_prompts` for serving tests (`num_prompts = max_concurrency × value`). Overrides JSON `num_prompts`. Default is NULL.
+- `ENABLE_ADAPTIVE_CONCURRENCY`: set the value to '1' to enable adaptive SLA-based concurrency search after the static serving max_concurrency sweep. Default value is 0.
+- `SLA_TTFT_MS`: default TTFT SLA threshold in milliseconds for adaptive concurrency search. Default value is 3000.
+- `SLA_TPOT_MS`: default TPOT SLA threshold in milliseconds for adaptive concurrency search. Default value is 100.
+- `ADAPTIVE_MAX_PROBES`: maximum number of extra adaptive search probes. Default value is 8.
+- `ADAPTIVE_MAX_CONCURRENCY`: maximum allowed concurrency during adaptive search. Default value is 1024.
 
 ### Visualization
 
@@ -60,12 +66,12 @@ Here is an example using the script to compare result_a and result_b with max co
 
 ***Output Tput (tok/s) — Model : [ meta-llama/Llama-3.1-8B-Instruct ] , Dataset Name : [ random ] , Input Len : [ 2048.0 ] , Output Len : [ 2048.0 ]***
 
-|    | # of max concurrency | qps  | results_a/benchmark_results.json | results_b/benchmark_results.json | perf_ratio        |
-|----|------|-----|-----------|----------|----------|
-| 0  | 12 | inf | 24.98   | 186.03 |  7.45 |
-| 1  | 16 | inf|  25.49  | 246.92 | 9.69 |
-| 2  | 24 | inf| 27.74  | 293.34 |  10.57 |
-| 3  | 32 | inf| 28.61  |306.69 | 10.72 |
+| | # of max concurrency | qps | results_a/benchmark_results.json | results_b/benchmark_results.json | perf_ratio |
+| | -------------------- | --- | -------------------------------- | -------------------------------- | ---------- |
+| 0 | 12 | inf | 24.98 | 186.03 |  7.45 |
+| 1 | 16 | inf |  25.49 | 246.92 | 9.69 |
+| 2 | 24 | inf | 27.74 | 293.34 |  10.57 |
+| 3 | 32 | inf | 28.61 |306.69 | 10.72 |
 
 ***compare-json-results.py – Command-Line Parameters***  
 

docs/cli/bench/mm_processor.md

@@ -29,7 +29,7 @@ vllm bench mm-processor \
 ## Measured Stages
 
 | Stage | Description |
-|-------|-------------|
+| ----- | ----------- |
 | `get_mm_hashes_secs` | Time spent hashing multimodal inputs |
 | `get_cache_missing_items_secs` | Time spent looking up the processor cache |
 | `apply_hf_processor_secs` | Time spent in the HuggingFace processor |

docs/cli/json_tip.inc.md

@@ -1,3 +1,4 @@
+<!-- markdownlint-disable MD041 -->
 When passing JSON CLI arguments, the following sets of arguments are equivalent:
 
 - `--json-arg '{"key1": "value1", "key2": {"key3": "value2"}}'`
@@ -6,4 +7,4 @@ When passing JSON CLI arguments, the following sets of arguments are equivalent:
 Additionally, list elements can be passed individually using `+`:
 
 - `--json-arg '{"key4": ["value3", "value4", "value5"]}'`
-- `--json-arg.key4+ value3 --json-arg.key4+='value4,value5'`
+- `--json-arg.key4+ value3 --json-arg.key4+='value4,value5'`

docs/configuration/conserving_memory.md

@@ -15,7 +15,7 @@ llm = LLM(model="ibm-granite/granite-3.1-8b-instruct", tensor_parallel_size=2)
 ```
 
 !!! warning
-    To ensure that vLLM initializes CUDA correctly, you should avoid calling related functions (e.g. [torch.cuda.set_device][])
+    To ensure that vLLM initializes CUDA correctly, you should avoid calling related functions (e.g. [torch.accelerator.set_device_index][])
     before initializing vLLM. Otherwise, you may run into an error like `RuntimeError: Cannot re-initialize CUDA in forked subprocess`.
 
     To control which devices are used, please instead set the `CUDA_VISIBLE_DEVICES` environment variable.

docs/configuration/optimization.md

@@ -293,7 +293,7 @@ llm = LLM(
 Based on the configuration, the content of the multi-modal caches on `P0` and `P1` are as follows:
 
 | mm_processor_cache_type | Cache Type | `P0` Cache | `P1` Engine Cache | `P1` Worker Cache | Max. Memory |
-|-------------------|-------------|------------|------------|-------------|-------------|
+| ----------------- | ----------- | ---------- | ---------- | ----------- | ----------- |
 | lru | Processor Caching | K + V | N/A | N/A | `mm_processor_cache_gb * data_parallel_size` |
 | lru | Key-Replicated Caching | K | K + V | N/A | `mm_processor_cache_gb * api_server_count` |
 | shm | Shared Memory Caching | K | N/A | V | `mm_processor_cache_gb * api_server_count` |

docs/contributing/README.md

@@ -75,7 +75,7 @@ For an optimized workflow when iterating on C++/CUDA kernels, see the [Increment
 vLLM uses `pre-commit` to lint and format the codebase. See <https://pre-commit.com/#usage> if `pre-commit` is new to you. Setting up `pre-commit` is as easy as:
 
 ```bash
-uv pip install pre-commit
+uv pip install pre-commit>=4.5.1
 pre-commit install
 ```
 
@@ -94,7 +94,6 @@ vLLM's `pre-commit` hooks will now run automatically every time you commit.
     Some `pre-commit` hooks only run in CI. If you need to, you can run them locally with:
 
     ```bash
-    pre-commit run --hook-stage manual markdownlint
     pre-commit run --hook-stage manual mypy-3.10
     ```
 
@@ -188,6 +187,30 @@ Using `-s` with `git commit` will automatically add this header.
     - **VSCode**: Open the [Settings editor](https://code.visualstudio.com/docs/configure/settings)
       and enable the `Git: Always Sign Off` (`git.alwaysSignOff`) field.
 
+### AI Assisted Contributions
+
+Before making an AI assisted contribution, you must:
+
+1. **Be involved**: Do not submit "pure agent" PRs. The human submitter is responsible for reviewing all changed lines, validating behavior end-to-end, and running relevant tests.
+2. **Ensure significance**: Avoid one-off "busywork" PRs (single typo, isolated style cleanup, one mutable default fix, etc.). Bundle mechanical cleanups into a clear, systematic scope.
+
+When AI tools provide non-trivial assistance in generating or modifying code, you must:
+
+1. **Review thoroughly**: You remain responsible for all code you submit. Review and understand AI-generated code with the same care as code you write manually.
+2. **Disclose in PR**: Always mention when a pull request includes AI-generated code. Add a note in the PR description.
+3. **Mark commits**: Add attribution using commit trailers such as `Co-authored-by:` (other projects use `Assisted-by:` or `Generated-by:`). For example:
+
+   ```text
+   Your commit message here
+
+   Co-authored-by: GitHub Copilot
+   Co-authored-by: Claude
+   Co-authored-by: gemini-code-assist
+   Signed-off-by: Your Name <your.email@example.com>
+   ```
+
+AI-assisted code must meet all quality standards: proper testing, documentation, adherence to style guides, and thorough review. Attribution helps reviewers evaluate contributions in context and maintains legal clarity for the project.
+
 ### PR Title and Classification
 
 Only specific types of PRs will be reviewed. The PR title is prefixed

docs/contributing/ci/update_pytorch_version.md

@@ -66,12 +66,12 @@ This complicates the process as we cannot use the out-of-the-box
 - Important indexes at the moment include:
 
 | Platform | `--extra-index-url` |
-|----------|-----------------|
-| CUDA 12.8| [https://download.pytorch.org/whl/cu128](https://download.pytorch.org/whl/cu128)|
-| CPU      | [https://download.pytorch.org/whl/cpu](https://download.pytorch.org/whl/cpu)|
+| -------- | ------------------- |
+| CUDA 12.8 | [https://download.pytorch.org/whl/cu128](https://download.pytorch.org/whl/cu128) |
+| CPU | [https://download.pytorch.org/whl/cpu](https://download.pytorch.org/whl/cpu) |
 | ROCm 6.2 | [https://download.pytorch.org/whl/rocm6.2.4](https://download.pytorch.org/whl/rocm6.2.4) |
 | ROCm 6.3 | [https://download.pytorch.org/whl/rocm6.3](https://download.pytorch.org/whl/rocm6.3) |
-| XPU      | [https://download.pytorch.org/whl/xpu](https://download.pytorch.org/whl/xpu) |
+| XPU | [https://download.pytorch.org/whl/xpu](https://download.pytorch.org/whl/xpu) |
 
 - Update the below files to match the CUDA version from step 1. This makes sure that the release vLLM wheel is tested on CI.
     - `.buildkite/release-pipeline.yaml`

docs/contributing/deprecation_policy.md

@@ -66,7 +66,7 @@ stages will be removed.
 Assume a feature is deprecated in `v0.9.0`.
 
 | Release       | Status                                                                                          |
-|---------------|-------------------------------------------------------------------------------------------------|
+| ------------- | ----------------------------------------------------------------------------------------------- |
 | `v0.9.0`      | Feature is deprecated with clear removal version listed.                                        |
 | `v0.10.0`     | Feature is now off by default, throws an error when used, and can be re-enabled for legacy use. |
 | `v0.11.0`     | Feature is removed.                                                                             |

docs/deployment/frameworks/helm.md

@@ -49,7 +49,7 @@ chart **including persistent volumes** and deletes the release.
 The following table describes configurable parameters of the chart in `values.yaml`:
 
 | Key | Type | Default | Description |
-|-----|------|---------|-------------|
+| --- | ---- | ------- | ----------- |
 | autoscaling | object | {"enabled":false,"maxReplicas":100,"minReplicas":1,"targetCPUUtilizationPercentage":80} | Autoscaling configuration |
 | autoscaling.enabled | bool | false | Enable autoscaling |
 | autoscaling.maxReplicas | int | 100 | Maximum replicas |

docs/deployment/integrations/kuberay.md

@@ -6,7 +6,7 @@ A Ray cluster can be declared in YAML, and the operator then handles pod schedul
 ## Why KubeRay instead of manual scripts?
 
 | Feature | Manual scripts | KubeRay |
-|---------|-----------------------------------------------------------|---------|
+| ------- | --------------------------------------------------------- | ------- |
 | Cluster bootstrap | Manually SSH into every node and run a script | One command to create or update the whole cluster: `kubectl apply -f cluster.yaml` |
 | Autoscaling | Manual | Automatically patches CRDs for adjusting cluster size |
 | Upgrades | Tear down & re-create manually | Blue/green deployment updates supported |

docs/design/arch_overview.md

@@ -119,7 +119,7 @@ The code can be found in [vllm/v1/engine/coordinator.py](../../vllm/v1/engine/co
 For a deployment with `N` GPUs, `TP` tensor parallel size, `DP` data parallel size, and `A` API server count:
 
 | Process Type | Count | Notes |
-|---|---|---|
+| - | - | - |
 | API Server | `A` (default `DP`) | Handles HTTP requests and input processing |
 | Engine Core | `DP` (default 1) | Scheduler and KV cache management |
 | GPU Worker | `N` (= `DP x PP x TP`) | One per GPU, executes model forward passes |

docs/design/attention_backends.md

@@ -101,7 +101,7 @@ Priority is **1 = highest** (tried first).
 **Blackwell (SM 10.x):**
 
 | Priority | Backend |
-|----------|---------|
+| -------- | ------- |
 | 1 | `FLASHINFER` |
 | 2 | `FLASH_ATTN` |
 | 3 | `TRITON_ATTN` |
@@ -110,7 +110,7 @@ Priority is **1 = highest** (tried first).
 **Ampere/Hopper (SM 8.x-9.x):**
 
 | Priority | Backend |
-|----------|---------|
+| -------- | ------- |
 | 1 | `FLASH_ATTN` |
 | 2 | `FLASHINFER` |
 | 3 | `TRITON_ATTN` |
@@ -121,7 +121,7 @@ Priority is **1 = highest** (tried first).
 **Blackwell (SM 10.x):**
 
 | Priority | Backend |
-|----------|---------|
+| -------- | ------- |
 | 1 | `FLASHINFER_MLA` |
 | 2 | `CUTLASS_MLA` |
 | 3 | `FLASH_ATTN_MLA` |
@@ -133,7 +133,7 @@ Priority is **1 = highest** (tried first).
 **Ampere/Hopper (SM 8.x-9.x):**
 
 | Priority | Backend |
-|----------|---------|
+| -------- | ------- |
 | 1 | `FLASH_ATTN_MLA` |
 | 2 | `FLASHMLA` |
 | 3 | `FLASHINFER_MLA` |
@@ -145,7 +145,7 @@ Priority is **1 = highest** (tried first).
 ## Legend
 
 | Column | Description |
-|--------|-------------|
+| ------ | ----------- |
 | **Dtypes** | Supported model data types (fp16, bf16, fp32) |
 | **KV Dtypes** | Supported KV cache data types (`auto`, `fp8`, `fp8_e4m3`, etc.) |
 | **Block Sizes** | Supported KV cache block sizes (%N means multiples of N) |
@@ -162,20 +162,20 @@ Priority is **1 = highest** (tried first).
 ## Standard Attention (MHA, MQA, GQA) Backends
 
 | Backend | Version | Dtypes | KV Dtypes | Block Sizes | Head Sizes | Sink | MM Prefix | DCP | Attention Types | Compute Cap. |
-|---------|---------|--------|-----------|-------------|------------|------|-----------|-----|-----------------|--------------|
-| `CPU_ATTN` |  | fp16, bf16, fp32 | `auto` | Any | 32, 64, 80, 96, 112, 128, 160, 192, 224, 256 | ❌ | ❌ | ❌ | All | N/A |
-| `FLASHINFER` | Native† | fp16, bf16 | `auto`, `bfloat16`, `fp8`, `fp8_e4m3`, `fp8_e5m2` | 16, 32, 64 | 64, 128, 256 | ❌ | ❌ | ✅ | Decoder | 7.x-9.x |
-| `FLASHINFER` | TRTLLM† | fp16, bf16 | `auto`, `bfloat16`, `fp8`, `fp8_e4m3`, `fp8_e5m2` | 16, 32, 64 | 64, 128, 256 | ✅ | ❌ | ✅ | Decoder | 10.x |
-| `FLASH_ATTN` | FA2* | fp16, bf16 | `auto`, `bfloat16` | %16 | Any | ❌ | ❌ | ✅ | All | ≥8.0 |
-| `FLASH_ATTN` | FA3* | fp16, bf16 | `auto`, `bfloat16`, `fp8`, `fp8_e4m3`, `fp8_e5m2` | %16 | Any | ✅ | ❌ | ✅ | All | 9.x |
-| `FLASH_ATTN` | FA4* | fp16, bf16 | `auto`, `bfloat16` | %16 | Any | ❌ | ❌ | ✅ | All | ≥10.0 |
-| `FLASH_ATTN_DIFFKV` |  | fp16, bf16 | `auto` | Any | Any | ❌ | ❌ | ✅ | Decoder | Any |
-| `FLEX_ATTENTION` |  | fp16, bf16, fp32 | `auto`, `bfloat16` | Any | Any | ❌ | ✅ | ❌ | Decoder, Encoder Only | Any |
-| `ROCM_AITER_FA` |  | fp16, bf16 | `auto`, `bfloat16`, `fp8`, `fp8_e4m3`, `fp8_e5m2` | 16, 32 | 64, 128, 256 | ❌ | ❌ | ❌ | Decoder, Enc-Dec | N/A |
-| `ROCM_AITER_UNIFIED_ATTN` |  | fp16, bf16 | `auto` | %16 | Any | ✅ | ✅ | ❌ | All | N/A |
-| `ROCM_ATTN` |  | fp16, bf16, fp32 | `auto`, `bfloat16`, `fp8`, `fp8_e4m3`, `fp8_e5m2` | 16, 32, 544 | 32, 64, 80, 96, 128, 160, 192, 224, 256 | ✅ | ✅ | ❌ | All | N/A |
-| `TREE_ATTN` |  | fp16, bf16 | `auto` | %16 | 32, 64, 96, 128, 160, 192, 224, 256 | ❌ | ❌ | ❌ | Decoder | Any |
-| `TRITON_ATTN` |  | fp16, bf16, fp32 | `auto`, `bfloat16`, `fp8`, `fp8_e4m3`, `fp8_e5m2` | %16 | Any | ✅ | ✅ | ❌ | All | Any |
+| ------- | ------- | ------ | --------- | ----------- | ---------- | ---- | --------- | --- | --------------- | ------------ |
+| `CPU_ATTN` | | fp16, bf16, fp32 | `auto` | Any | 32, 64, 80, 96, 112, 128, 160, 192, 224, 256 | ❌ | ❌ | ❌ | All | N/A |
+| `FLASHINFER` | Native† | fp16, bf16 | `auto`, `float16`, `bfloat16`, `fp8`, `fp8_e4m3`, `fp8_e5m2` | 16, 32, 64 | 64, 128, 256 | ❌ | ❌ | ✅ | Decoder | 7.x-9.x |
+| `FLASHINFER` | TRTLLM† | fp16, bf16 | `auto`, `float16`, `bfloat16`, `fp8`, `fp8_e4m3`, `fp8_e5m2` | 16, 32, 64 | 64, 128, 256 | ✅ | ❌ | ✅ | Decoder | 10.x |
+| `FLASH_ATTN` | FA2* | fp16, bf16 | `auto`, `float16`, `bfloat16` | %16 | Any | ❌ | ❌ | ✅ | All | ≥8.0 |
+| `FLASH_ATTN` | FA3* | fp16, bf16 | `auto`, `float16`, `bfloat16`, `fp8`, `fp8_e4m3`, `fp8_e5m2` | %16 | Any | ✅ | ❌ | ✅ | All | 9.x |
+| `FLASH_ATTN` | FA4* | fp16, bf16 | `auto`, `float16`, `bfloat16` | %16 | Any | ❌ | ❌ | ✅ | All | ≥10.0 |
+| `FLASH_ATTN_DIFFKV` | | fp16, bf16 | `auto` | Any | Any | ❌ | ❌ | ✅ | Decoder | Any |
+| `FLEX_ATTENTION` | | fp16, bf16, fp32 | `auto`, `float16`, `bfloat16` | Any | Any | ❌ | ✅ | ❌ | Decoder, Encoder Only | Any |
+| `ROCM_AITER_FA` | | fp16, bf16 | `auto`, `float16`, `bfloat16`, `fp8`, `fp8_e4m3`, `fp8_e5m2` | 16, 32 | 64, 128, 256 | ❌ | ❌ | ❌ | Decoder, Enc-Dec | N/A |
+| `ROCM_AITER_UNIFIED_ATTN` | | fp16, bf16 | `auto` | %16 | Any | ✅ | ✅ | ❌ | All | N/A |
+| `ROCM_ATTN` | | fp16, bf16, fp32 | `auto`, `float16`, `bfloat16`, `fp8`, `fp8_e4m3`, `fp8_e5m2` | %16 | 32, 64, 80, 96, 128, 160, 192, 224, 256 | ✅ | ✅ | ❌ | All | N/A |
+| `TREE_ATTN` | | fp16, bf16 | `auto`, `float16`, `bfloat16` | %16 | 32, 64, 96, 128, 160, 192, 224, 256 | ❌ | ❌ | ❌ | Decoder | Any |
+| `TRITON_ATTN` | | fp16, bf16, fp32 | `auto`, `float16`, `bfloat16`, `fp8`, `fp8_e4m3`, `fp8_e5m2` | %16 | Any | ✅ | ✅ | ❌ | All | Any |
 
 > **†** FlashInfer uses TRTLLM attention on Blackwell (SM100), which supports sinks. Disable via `--attention-config.use_trtllm_attention=0`.
 >
@@ -191,10 +191,10 @@ The prefill backend is selected at runtime based on hardware and
 configuration.
 
 | Backend | Description | Compute Cap. | Enable | Disable | Notes |
-|---------|-------------|--------------|--------|---------|-------|
+| ------- | ----------- | ------------ | ------ | ------- | ----- |
 | TRT-LLM Ragged‡ | TensorRT-LLM ragged attention | 10.x | Default on SM100 | `-ac.use_trtllm_ragged_deepseek_prefill=0` | DeepSeek R1 dims only |
 | FlashInfer | FlashInfer CUTLASS backend | 10.x | `-ac.disable_flashinfer_prefill=0` | `-ac.disable_flashinfer_prefill=1` | DeepSeek R1 dims only |
-| cuDNN | cuDNN-based attention | 10.x | `-ac.use_cudnn_prefill=1` | `-ac.use_cudnn_prefill=0` |  |
+| cuDNN | cuDNN-based attention | 10.x | `-ac.use_cudnn_prefill=1` | `-ac.use_cudnn_prefill=0` | |
 | FlashAttention | FlashAttention varlen (FA2/FA3) | Any | Default fallback | Use other backends | FA3 on SM90, FA2 otherwise |
 
 > **‡** TRT-LLM Ragged is the default on Blackwell (SM100).
@@ -203,14 +203,15 @@ configuration.
 ### Decode Backends
 
 | Backend | Dtypes | KV Dtypes | Block Sizes | Head Sizes | Sink | Sparse | MM Prefix | DCP | Attention Types | Compute Cap. |
-|---------|--------|-----------|-------------|------------|------|--------|-----------|-----|-----------------|--------------|
-| `CUTLASS_MLA` | fp16, bf16 | `auto`, `bfloat16`, `fp8`, `fp8_e4m3` | 128 | Any | ❌ | ❌ | ❌ | ✅ | Decoder | 10.x |
-| `FLASHINFER_MLA` | fp16, bf16 | `auto`, `bfloat16`, `fp8`, `fp8_e4m3` | 32, 64 | Any | ❌ | ❌ | ❌ | ❌ | Decoder | 10.x |
-| `FLASHINFER_MLA_SPARSE` | fp16, bf16 | `auto`, `bfloat16` | 32, 64 | 576 | ❌ | ✅ | ❌ | ❌ | Decoder | 10.x |
-| `FLASHMLA` | fp16, bf16 | `auto`, `bfloat16`, `fp8`, `fp8_e4m3` | 64 | Any | ❌ | ❌ | ❌ | ✅ | Decoder | 9.x-10.x |
+| ------- | ------ | --------- | ----------- | ---------- | ---- | ------ | --------- | --- | --------------- | ------------ |
+| `CUTLASS_MLA` | fp16, bf16 | `auto`, `float16`, `bfloat16`, `fp8`, `fp8_e4m3` | 128 | Any | ❌ | ❌ | ❌ | ✅ | Decoder | 10.x |
+| `FLASHINFER_MLA` | fp16, bf16 | `auto`, `float16`, `bfloat16`, `fp8`, `fp8_e4m3` | 32, 64 | Any | ❌ | ❌ | ❌ | ❌ | Decoder | 10.x |
+| `FLASHINFER_MLA_SPARSE` | fp16, bf16 | `auto`, `float16`, `bfloat16`, `fp8`, `fp8_e4m3` | 32, 64 | 576 | ❌ | ✅ | ❌ | ❌ | Decoder | 10.x |
+| `FLASHMLA` | fp16, bf16 | `auto`, `float16`, `bfloat16`, `fp8`, `fp8_e4m3` | 64 | Any | ❌ | ❌ | ❌ | ✅ | Decoder | 9.x-10.x |
 | `FLASHMLA_SPARSE` | bf16 | `auto`, `bfloat16`, `fp8_ds_mla` | 64 | 576 | ❌ | ✅ | ❌ | ❌ | Decoder | 9.x-10.x |
-| `FLASH_ATTN_MLA` | fp16, bf16 | `auto`, `bfloat16` | %16 | Any | ❌ | ❌ | ❌ | ✅ | Decoder | 9.x |
-| `ROCM_AITER_MLA` | fp16, bf16 | `auto`, `bfloat16`, `fp8`, `fp8_e4m3`, `fp8_e5m2` | 1 | Any | ❌ | ❌ | ❌ | ❌ | Decoder | N/A |
-| `ROCM_AITER_MLA_SPARSE` | fp16, bf16 | `auto`, `bfloat16` | 1 | Any | ❌ | ✅ | ❌ | ❌ | Decoder | N/A |
+| `FLASH_ATTN_MLA` | fp16, bf16 | `auto`, `float16`, `bfloat16` | %16 | Any | ❌ | ❌ | ❌ | ✅ | Decoder | 9.x |
+| `ROCM_AITER_MLA` | fp16, bf16 | `auto`, `float16`, `bfloat16`, `fp8`, `fp8_e4m3`, `fp8_e5m2` | 1 | Any | ❌ | ❌ | ❌ | ❌ | Decoder | N/A |
+| `ROCM_AITER_MLA_SPARSE` | fp16, bf16 | `auto`, `float16`, `bfloat16` | 1 | Any | ❌ | ✅ | ❌ | ❌ | Decoder | N/A |
 | `ROCM_AITER_TRITON_MLA` | fp16, bf16 | `auto` | Any | Any | ❌ | ❌ | ❌ | ❌ | Decoder | N/A |
-| `TRITON_MLA` | fp16, bf16 | `auto`, `bfloat16` | Any | Any | ❌ | ❌ | ❌ | ✅ | Decoder | Any |
+| `TRITON_MLA` | fp16, bf16 | `auto`, `float16`, `bfloat16`, `fp8`, `fp8_e4m3` | %16 | Any | ❌ | ❌ | ❌ | ✅ | Decoder | Any |
+| `XPU_MLA_SPARSE` | fp16, bf16 | `auto`, `float16`, `bfloat16` | Any | 576 | ❌ | ✅ | ❌ | ❌ | Decoder | Any |

docs/design/cuda_graphs.md

@@ -174,18 +174,18 @@ Suppose we have hybrid attention backends (e.g., in mamba mixer models). In that
 The following table lists backends that support full CUDA Graphs at the time of writing.
 
 | Attention Backend | cudagraph_support | Comments |
-|:---|:---|:---|
+| :---------------- | :---------------- | :------- |
 | FlashAttention v2 | `UNIFORM_BATCH` | Actually `ALWAYS` but workaround to fallback to `FULL_AND_PIECEWISE` for performance reason |
 | FlashAttention v3 | `ALWAYS` | has unified routine for both batches, so `FULL` mode is good |
 | Triton Attention | `ALWAYS` | prefer `FULL_AND_PIECEWISE` since it has different kernels for prefill/mixed and pure decode batches |
-| AITER FlashAttention | `UNIFORM_BATCH`| |
+| AITER FlashAttention | `UNIFORM_BATCH` | |
 | FlashInfer | `UNIFORM_SINGLE_TOKEN_DECODE` | Will be set to `UNIFORM_BATCH` when using TRTLLM attention on Blackwell |
 | FlashMLA | `UNIFORM_BATCH` | |
 | FlashInferMLA | `UNIFORM_BATCH` | |
 | FlashInferMLASparse | `UNIFORM_BATCH` | |
 | AITER MLA | `UNIFORM_SINGLE_TOKEN_DECODE` | |
 | CUTLASS MLA | `UNIFORM_SINGLE_TOKEN_DECODE` | |
-| Mamba attention| `UNIFORM_SINGLE_TOKEN_DECODE` | |
+| Mamba attention | `UNIFORM_SINGLE_TOKEN_DECODE` | |
 
 Unlisted backends are all declared as `NEVER`.
 

docs/design/debug_vllm_compile.md

@@ -5,12 +5,12 @@ TL;DR:
 - use tlparse to acquire torch.compile logs. Include these logs in bug reports and/or support asks.
 - The vLLM-torch.compile integration is multiple pieces. vLLM exposes flags to turn off each piece:
 
-| Online Flag | Offline Flag   |      Result |
-|----------|----------|-------------|
-| --enforce-eager | enforce_eager=True |  Turn off torch.compile and CUDAGraphs |
-| -cc.mode=0 | mode=CompilationMode.NONE |  Turn off torch.compile only |
-| -cc.cudagraph_mode=NONE | compilation_config=CompilationConfig(cudagraph_mode=CUDAGraphMode.NONE) |  Turn off CUDAGraphs only |
-| -cc.backend=eager | compilation_config=CompilationConfig(backend='eager') |  Turn off TorchInductor |
+| Online Flag | Offline Flag | Result |
+| ----------- | ------------ | ------ |
+| --enforce-eager | enforce_eager=True | Turn off torch.compile and CUDAGraphs |
+| -cc.mode=0 | mode=CompilationMode.NONE | Turn off torch.compile only |
+| -cc.cudagraph_mode=NONE | compilation_config=CompilationConfig(cudagraph_mode=CUDAGraphMode.NONE) | Turn off CUDAGraphs only |
+| -cc.backend=eager | compilation_config=CompilationConfig(backend='eager') | Turn off TorchInductor |
 
 ## vLLM-torch.compile overview