[NPU][Diffusion] Disable loading latency checks in Ascend fixtures (#40544)

python/sglang/multimodal_gen/test/server/ascend/conftest.py

@@ -1,4 +1,7 @@
-"""Ascend NPU conftest: evict stale model page cache before each test case.
+"""Ascend NPU fixtures for performance validation and model page cache.
+
+NPU performance guards cover inference latency, not model loading latency.
+Loading times are still collected and reported by the shared test harness.
 
 Memory-capped CI runners (e.g. a 128 GiB cgroup on the 4-NPU A3 pool) count
 reclaimable page cache from previously loaded models in cgroup
@@ -24,6 +27,16 @@ _CGROUP_V2_CURRENT = "/sys/fs/cgroup/memory.current"
 _CGROUP_V1_USAGE = "/sys/fs/cgroup/memory/memory.usage_in_bytes"
 
 
+@pytest.fixture(autouse=True)
+def _disable_load_latency_validation(monkeypatch):
+    """Disable loading-latency comparisons only for tests in this directory."""
+    from sglang.multimodal_gen.test.server.test_server_utils import PerformanceValidator
+
+    monkeypatch.setattr(
+        PerformanceValidator, "validate_load", lambda self, summary: None
+    )
+
+
 def _read_cgroup_memory_current() -> str:
     """Best-effort read of the container's cgroup memory usage in bytes."""
     for path in (_CGROUP_V2_CURRENT, _CGROUP_V1_USAGE):