[Perf][CI] Add MiniMax-H3 4xH100 diffusion perf config (#5836)

Signed-off-by: David Chen <530634352@qq.com>

tests/dfx/perf/scripts/run_diffusion_benchmark.py

@@ -350,10 +350,49 @@ def _kill_process_tree(pid: int) -> None:
 
 
 def _resolve_offline_model(model: str) -> str:
-    """Under HF_HUB_OFFLINE, resolve a HF repo id to its local snapshot dir."""
+    """Resolve a model string to a local directory.
+
+    Local paths pass through unchanged. HF repo ids are resolved to their local
+    snapshot dir when ``HF_HUB_OFFLINE`` is set. ``repo_id/subfolder`` (e.g.
+    ``MiniMaxAI/MiniMax-H3/FL2VA``) is resolved to the matching partition
+    subfolder of the snapshot, downloading only that subfolder when online.
+    """
     import huggingface_hub
 
-    if not model or os.path.isdir(model) or not huggingface_hub.constants.HF_HUB_OFFLINE:
+    if not model or os.path.isdir(model):
+        return model
+
+    # MiniMax-H3 custom code uses relative imports across files, which breaks
+    # when the HF cache snapshot is symlinked (``get_class_from_dynamic_module``
+    # resolves ``realpath`` into the blobs dir). Mirror the accuracy test's env
+    # overrides so CI / local runs can point at a materialized partition. The
+    # repo-root key (used with ``--task-type fl2va|ref2va``) expects a
+    # materialized root containing the FL2VA/Ref2VA subfolders.
+    model_env_overrides = {
+        "MiniMaxAI/MiniMax-H3": "VLLM_TEST_MINIMAX_H3_MODEL",
+        "MiniMaxAI/MiniMax-H3/FL2VA": "VLLM_TEST_MINIMAX_H3_FL2VA_MODEL",
+        "MiniMaxAI/MiniMax-H3/Ref2VA": "VLLM_TEST_MINIMAX_H3_REF2VA_MODEL",
+    }
+    env_name = model_env_overrides.get(model)
+    if env_name:
+        env_model = os.environ.get(env_name)
+        if env_model:
+            return env_model
+
+    parts = model.split("/")
+    if len(parts) >= 3:
+        repo_id = "/".join(parts[:2])
+        subfolder = "/".join(parts[2:])
+        from huggingface_hub import snapshot_download
+
+        snapshot_root = snapshot_download(
+            repo_id,
+            allow_patterns=[f"{subfolder}/**"],
+            local_files_only=huggingface_hub.constants.HF_HUB_OFFLINE,
+        )
+        return str(Path(snapshot_root) / subfolder)
+
+    if not huggingface_hub.constants.HF_HUB_OFFLINE:
         return model
     from huggingface_hub import snapshot_download
 
@@ -387,6 +426,11 @@ class DiffusionServer:
     def _start_server(self) -> None:
         env = os.environ.copy()
         env["VLLM_WORKER_MULTIPROC_METHOD"] = "spawn"
+        # Give each run its own writable video-storage dir. The server default
+        # (/tmp/storage) may be missing or not writable on shared hosts / CI.
+        storage_path = Path(os.environ.get("VLLM_OMNI_STORAGE_PATH", str(BENCHMARK_RESULT_DIR / "storage")))
+        storage_path.mkdir(parents=True, exist_ok=True)
+        env["VLLM_OMNI_STORAGE_PATH"] = str(storage_path)
 
         cmd = [
             sys.executable,