ci: combine H200 8-GPU warmup steps and surface server log on every path (#24253)

.github/workflows/pr-test.yml

@@ -780,23 +780,20 @@ jobs:
           CUSTOM_BUILD_SGL_KERNEL=${{needs.check-changes.outputs.sgl_kernel}} bash scripts/ci/cuda/ci_install_dependency.sh
 
       - name: Warmup DeepGEMM JIT Compilation
-        timeout-minutes: 25
+        # Per-model TP must match the test's launch in test/registered/ — see
+        # FALLBACK_ARGS in scripts/ci/cuda/warmup_deep_gemm.py for extra dp/ep
+        # flags. Only models that actually invoke DeepGEMM kernels at runtime
+        # are listed. Cold-cache ~13 min; warm-cache ≤30 s via marker file.
+        timeout-minutes: 60
         run: |
-          # Activate venv if available (GITHUB_ENV may have failed to propagate)
           [ -f "${SGLANG_CI_VENV_PATH:-/dev/null}/bin/activate" ] && source "${SGLANG_CI_VENV_PATH}/bin/activate"
           [ -f "${SGLANG_CI_VENV_PATH:-/dev/null}/env.sh" ] && source "${SGLANG_CI_VENV_PATH}/env.sh"
           python3 scripts/ci/cuda/warmup_deep_gemm.py \
             deepseek-ai/DeepSeek-V3-0324:8 \
-            deepseek-ai/DeepSeek-V3.2-Exp:8
+            deepseek-ai/DeepSeek-V3.2:8 \
-
+            zai-org/GLM-5-FP8:8 \
-      - name: Warmup Server CUDA Graphs
+            XiaomiMiMo/MiMo-V2-Flash:4 \
-        timeout-minutes: 25
+            XiaomiMiMo/MiMo-V2.5:8
-        run: |
-          [ -f "${SGLANG_CI_VENV_PATH:-/dev/null}/bin/activate" ] && source "${SGLANG_CI_VENV_PATH}/bin/activate"
-          [ -f "${SGLANG_CI_VENV_PATH:-/dev/null}/env.sh" ] && source "${SGLANG_CI_VENV_PATH}/env.sh"
-          python3 scripts/ci/cuda/warmup_server.py \
-            deepseek-ai/DeepSeek-V3-0324:8 \
-            inclusionAI/Ring-2.5-1T:8
 
       - name: Run test
         timeout-minutes: 30
@@ -998,7 +995,7 @@ jobs:
           [ -f "${SGLANG_CI_VENV_PATH:-/dev/null}/env.sh" ] && source "${SGLANG_CI_VENV_PATH}/env.sh"
           python3 scripts/ci/cuda/warmup_deep_gemm.py \
             deepseek-ai/DeepSeek-V3-0324:8 \
-            deepseek-ai/DeepSeek-V3.2-Exp:8
+            deepseek-ai/DeepSeek-V3.2:8
 
       - name: Warmup Server CUDA Graphs
         timeout-minutes: 25

scripts/ci/cuda/warmup_deep_gemm.py

@@ -11,16 +11,61 @@ for unsupported architectures.
 Usage:
     python3 scripts/ci/cuda/warmup_deep_gemm.py \
         deepseek-ai/DeepSeek-V3-0324:8 \
-        deepseek-ai/DeepSeek-V3.2-Exp:8
+        deepseek-ai/DeepSeek-V3.2:8
 """
 
+import hashlib
 import json
 import os
+import signal
 import subprocess
 import sys
+import threading
 import time
 from math import ceil
 from pathlib import Path
+from typing import Dict, List
+
+# Shared with warmup_server.py. Wipe alongside /root/.cache/deep_gemm if you
+# clear the DeepGEMM JIT cache — a stale marker → in-test JIT compile.
+MARKER_DIR = os.path.join(os.path.expanduser("~"), ".cache", "sglang", "warmup_markers")
+
+# Outer cap for stuck fallback subprocesses; CRASH_MARKERS abort sooner.
+FALLBACK_TIMEOUT_SEC = 600
+
+# Per-model launch flags forwarded to `sglang.compile_deep_gemm`. DeepGEMM
+# cache key includes per-rank N/K (depends on tp/dp/ep) — must match each
+# model's `other_args` in test/registered/ or warmed shapes won't be hit.
+FALLBACK_ARGS: Dict[str, List[str]] = {
+    "deepseek-ai/DeepSeek-V3.2": ["--dp", "8", "--enable-dp-attention"],
+    "zai-org/GLM-5-FP8": ["--dp", "8", "--enable-dp-attention"],
+    "XiaomiMiMo/MiMo-V2-Flash": [
+        "--dp",
+        "2",
+        "--enable-dp-attention",
+        "--attention-backend",
+        "fa3",
+    ],
+    # --mm-enable-dp-encoder is required: without it DP0 runs the vision
+    # encoder alone and DP1 deadlocks at the next collective.
+    "XiaomiMiMo/MiMo-V2.5": [
+        "--dp",
+        "2",
+        "--enable-dp-attention",
+        "--mm-enable-dp-encoder",
+        "--attention-backend",
+        "fa3",
+        "--mm-attention-backend",
+        "fa3",
+    ],
+}
+
+# compile_deep_gemm polls /v1/models for the full timeout even after a TP rank
+# dies; the watcher uses these to kill the group within seconds instead.
+CRASH_MARKERS = (
+    "Scheduler hit an exception",
+    "Received sigquit from a child",
+)
 
 # Configure DeepGEMM cache before importing deep_gemm
 os.environ["DG_JIT_CACHE_DIR"] = os.getenv(
@@ -294,9 +339,89 @@ def compile_shapes_lightweight(shapes, m_list):
         print(f"  Done in {elapsed:.1f}s")
 
 
+def _kill_pg_and_wait(proc):
+    """SIGTERM the subprocess's process group, escalate to SIGKILL if needed."""
+    try:
+        os.killpg(os.getpgid(proc.pid), signal.SIGTERM)
+    except (ProcessLookupError, OSError):
+        pass
+    try:
+        return proc.wait(timeout=10)
+    except subprocess.TimeoutExpired:
+        try:
+            os.killpg(os.getpgid(proc.pid), signal.SIGKILL)
+        except (ProcessLookupError, OSError):
+            pass
+        try:
+            return proc.wait(timeout=5)
+        except subprocess.TimeoutExpired:
+            return -1
+
+
+def get_version_key():
+    """Hash of Python + Triton + PyTorch versions; invalidates markers on upgrade."""
+    parts = [sys.version]
+    try:
+        import triton  # noqa: WPS433
+
+        parts.append(f"triton={triton.__version__}")
+    except ImportError:
+        parts.append("triton=none")
+    try:
+        import torch  # noqa: WPS433
+
+        parts.append(f"torch={torch.__version__}")
+    except ImportError:
+        parts.append("torch=none")
+    return hashlib.sha256("|".join(parts).encode()).hexdigest()[:12]
+
+
+def get_fallback_marker_path(model, tp, extra_args):
+    """Marker path for one (model, tp, extra_args) fallback invocation."""
+    args_blob = json.dumps(list(extra_args))
+    args_hash = hashlib.md5(args_blob.encode()).hexdigest()[:8]
+    safe_model = model.replace("/", "--")
+    return os.path.join(
+        MARKER_DIR,
+        f"deepgemm_fallback_{safe_model}_tp{tp}_{args_hash}_{get_version_key()}.done",
+    )
+
+
+def check_fallback_marker(model, tp, extra_args):
+    return os.path.exists(get_fallback_marker_path(model, tp, extra_args))
+
+
+def write_fallback_marker(model, tp, extra_args):
+    marker = get_fallback_marker_path(model, tp, extra_args)
+    os.makedirs(os.path.dirname(marker), exist_ok=True)
+    Path(marker).write_text(
+        json.dumps(
+            {
+                "model": model,
+                "tp": tp,
+                "extra_args": list(extra_args),
+                "version_key": get_version_key(),
+                "timestamp": time.time(),
+            }
+        )
+    )
+    print(f"  Wrote marker: {marker}")
+
+
 def fallback_compile_deep_gemm(model, tp):
-    """Fall back to full sglang.compile_deep_gemm (loads model weights)."""
+    """Fall back to full sglang.compile_deep_gemm (loads model weights).
-    print(f"Falling back to full compile_deep_gemm for {model} (tp={tp})...")
+
+    Runs in its own process group so a hung subprocess (e.g. one TP rank
+    crashes and the rest deadlock on NCCL collectives) can be killed
+    cleanly without leaking children. Watches subprocess output for crash
+    markers so a deterministic failure aborts in seconds rather than burning
+    the full FALLBACK_TIMEOUT_SEC.
+    """
+    extra_args = FALLBACK_ARGS.get(model, [])
+    print(
+        f"Falling back to full compile_deep_gemm for {model} "
+        f"(tp={tp}, extra_args={extra_args})..."
+    )
     cmd = [
         sys.executable,
         "-m",
@@ -308,11 +433,57 @@ def fallback_compile_deep_gemm(model, tp):
         "--trust-remote-code",
         "--model-loader-extra-config",
         '{"enable_multithread_load": true, "num_threads": 64}',
+        # Cap compile_deep_gemm's own /v1/models polling loop so it gives up
+        # before our outer timeout has to SIGTERM it.
+        "--timeout",
+        str(FALLBACK_TIMEOUT_SEC),
+        *extra_args,
     ]
-    result = subprocess.run(cmd)
+
-    if result.returncode != 0:
+    crashed = threading.Event()
-        print(f"Warning: fallback failed for {model} (exit code {result.returncode})")
+    proc = subprocess.Popen(
-    return result.returncode == 0
+        cmd,
+        preexec_fn=os.setsid,
+        stdout=subprocess.PIPE,
+        stderr=subprocess.STDOUT,
+        bufsize=1,
+        text=True,
+    )
+
+    def _watch():
+        # Stream child output to our stdout while scanning for crash markers.
+        for line in proc.stdout:
+            sys.stdout.write(line)
+            sys.stdout.flush()
+            if not crashed.is_set() and any(m in line for m in CRASH_MARKERS):
+                crashed.set()
+
+    watcher = threading.Thread(target=_watch, daemon=True)
+    watcher.start()
+
+    deadline = time.monotonic() + FALLBACK_TIMEOUT_SEC
+    while True:
+        rc = proc.poll()
+        if rc is not None:
+            watcher.join(timeout=2)
+            if rc != 0:
+                print(f"Warning: fallback failed for {model} (exit code {rc})")
+            return rc == 0
+        if crashed.is_set():
+            print(
+                f"Warning: detected crash marker in {model} (tp={tp}) subprocess; "
+                "killing process group and continuing."
+            )
+            _kill_pg_and_wait(proc)
+            return False
+        if time.monotonic() >= deadline:
+            print(
+                f"Warning: fallback timed out after {FALLBACK_TIMEOUT_SEC}s for "
+                f"{model} (tp={tp}); killing process group and continuing."
+            )
+            _kill_pg_and_wait(proc)
+            return False
+        time.sleep(2)
 
 
 def main():
@@ -353,22 +524,39 @@ def main():
             print(f"  SKIP   {model} (tp={tp}): config.json not in HF cache")
             continue
 
+        # Models with FALLBACK_ARGS launch with extra dp/ep/dp-attention flags
+        # that change per-rank N/K. The lightweight path doesn't model those —
+        # it computes attention shapes assuming TP-only sharding — so dedup'ing
+        # such a model to a no-override DeepSeek V2/V3 lookalike (e.g. V3.2 →
+        # V3-0324) silently picks the wrong attention shapes for the test's
+        # actual launch config. Force these through fallback so the populated
+        # cache matches the real test.
+        has_fallback_override = model in FALLBACK_ARGS
+
         key = get_architecture_key(config, tp)
-        if key in seen_keys:
+        if key in seen_keys and not has_fallback_override:
             print(f"  DEDUP  {model} (tp={tp}): same shapes as {seen_keys[key]}")
             continue
 
-        if is_deepseek_v2v3(config):
+        if is_deepseek_v2v3(config) and not has_fallback_override:
             shapes = compute_deepseek_v2v3_shapes(config, tp)
             seen_keys[key] = model
             to_process.append((model, tp, config, shapes))
             print(f"  FOUND  {model} (tp={tp}): {len(shapes)} DeepGEMM shape(s)")
         else:
-            # Unknown architecture: will use fallback
             seen_keys[key] = model
             to_process.append((model, tp, config, None))
-            arch = config.get("architectures", ["unknown"])
+            if has_fallback_override:
-            print(f"  FOUND  {model} (tp={tp}): unknown arch {arch}, will use fallback")
+                print(
+                    f"  FOUND  {model} (tp={tp}): forced fallback (extra args "
+                    f"{FALLBACK_ARGS[model]})"
+                )
+            else:
+                arch = config.get("architectures", ["unknown"])
+                print(
+                    f"  FOUND  {model} (tp={tp}): unknown arch {arch}, "
+                    "will use fallback"
+                )
 
     if not to_process:
         print("\nNo models to process. Done.")
@@ -383,8 +571,20 @@ def main():
         print(f"{'=' * 60}")
 
         if shapes is None:
-            # Unknown architecture: fall back to full compile_deep_gemm
+            # Fallback path: full sglang.compile_deep_gemm with the test's launch
-            fallback_compile_deep_gemm(model, tp)
+            # flags. Loading model weights inside that subprocess is the dominant
+            # cost (45-170s/model) and dwarfs the actual DeepGEMM compile, so we
+            # skip the whole fallback when the marker says we already populated
+            # this cache. Cache is keyed on (model, tp, extra_args, version_key).
+            extra_args = FALLBACK_ARGS.get(model, [])
+            if check_fallback_marker(model, tp, extra_args):
+                print(
+                    f"  SKIP fallback (warm marker found): {model} (tp={tp}, "
+                    f"extra_args={extra_args})"
+                )
+                continue
+            if fallback_compile_deep_gemm(model, tp):
+                write_fallback_marker(model, tp, extra_args)
             continue
 
         # Print shape summary

scripts/ci/cuda/warmup_server.py

@@ -11,8 +11,7 @@ invalidated when Python, Triton, or PyTorch versions change.
 
 Usage:
     python3 scripts/ci/cuda/warmup_server.py \
-        deepseek-ai/DeepSeek-V3-0324:8 \
+        deepseek-ai/DeepSeek-V3-0324:8
-        inclusionAI/Ring-2.5-1T:8
 """
 
 import hashlib
@@ -87,23 +86,41 @@ def write_marker(model, tp):
 
 def kill_server(proc):
     """Kill server process tree."""
-    if proc.poll() is not None:
+    if proc.poll() is None:
-        return
-    try:
-        os.killpg(os.getpgid(proc.pid), signal.SIGTERM)
-    except (ProcessLookupError, OSError):
-        pass
-    try:
-        proc.wait(timeout=15)
-    except subprocess.TimeoutExpired:
         try:
-            os.killpg(os.getpgid(proc.pid), signal.SIGKILL)
+            os.killpg(os.getpgid(proc.pid), signal.SIGTERM)
         except (ProcessLookupError, OSError):
             pass
         try:
-            proc.wait(timeout=5)
+            proc.wait(timeout=15)
         except subprocess.TimeoutExpired:
+            try:
+                os.killpg(os.getpgid(proc.pid), signal.SIGKILL)
+            except (ProcessLookupError, OSError):
+                pass
+            try:
+                proc.wait(timeout=5)
+            except subprocess.TimeoutExpired:
+                pass
+
+    # sglang's scheduler_TP* and detokenizer workers spawn through
+    # multiprocessing with their own session/process group, so they escape
+    # killpg on launch_server and stay alive holding GPU memory after a
+    # readiness-timeout or unclean exit. Kill any survivors by name so the
+    # next model (or the next CI step) starts with empty GPUs.
+    for pattern in ("sglang::scheduler", "sglang::detokenizer"):
+        try:
+            subprocess.run(
+                ["pkill", "-9", "-f", pattern],
+                timeout=5,
+                check=False,
+                stdout=subprocess.DEVNULL,
+                stderr=subprocess.DEVNULL,
+            )
+        except (FileNotFoundError, subprocess.TimeoutExpired):
             pass
+    # Let the driver release device memory before the caller measures it.
+    time.sleep(2)
 
 
 def wait_for_server(base_url, proc, timeout):
@@ -192,15 +209,6 @@ def warmup_one_model(model, tp, port):
         ok, err = wait_for_server(base_url, proc, SERVER_STARTUP_TIMEOUT)
         if not ok:
             print(f"  Warning: server not ready: {err}")
-            # Dump last lines of server log for debugging
-            try:
-                log_file.flush()
-                with open(log_path) as f:
-                    lines = f.readlines()
-                for line in lines[-20:]:
-                    print(f"    | {line.rstrip()}")
-            except Exception:
-                pass
             return False
 
         print("  Server ready, sending generate request...")
@@ -208,6 +216,20 @@ def warmup_one_model(model, tp, port):
         return True
 
     finally:
+        # Surface the tail of the server log so CI captures validation
+        # messages, exceptions, and warmup progress (the launch_server
+        # subprocess writes stdout/stderr to the tempfile, not our stdout).
+        try:
+            log_file.flush()
+            with open(log_path) as f:
+                lines = f.readlines()
+            print(f"  --- server log tail ({len(lines)} lines, last 30) ---")
+            for line in lines[-30:]:
+                print(f"    | {line.rstrip()}")
+            print("  --- end server log ---")
+        except Exception:
+            pass
+
         print("  Killing server...")
         kill_server(proc)
         log_file.close()