Feat/add fi selective state update kernel call (#18070)

Signed-off-by: Shahar Mor <smor@nvidia.com>

test/registered/layers/mamba/conftest.py

@@ -0,0 +1,19 @@
+import pytest
+
+from sglang.srt.layers.attention.mamba.ops import ssu_dispatch
+from sglang.srt.layers.attention.mamba.ops.ssu_dispatch import (
+    initialize_mamba_selective_state_update_backend,
+)
+from sglang.srt.server_args import ServerArgs
+
+
+@pytest.fixture(scope="session", autouse=True)
+def _init_mamba_ssu_backend():
+    """Initialize the Mamba SSU dispatch backend for the test session.
+
+    In production this happens in Scheduler.init_mamba_backend(). Tests have no
+    scheduler, so we do it here via the same public API.
+    """
+    initialize_mamba_selective_state_update_backend(ServerArgs(model_path="dummy"))
+    yield
+    ssu_dispatch._mamba_ssu_backend = None

test/registered/models/test_nvidia_nemotron_3_nano.py

@@ -26,6 +26,19 @@ class TestNvidiaNemotron3Nano30BBF16(LMEvalMixin, DefaultServerBase):
     ] + NEMOTRON_3_NANO_THINKING_ARGS
 
 
+class TestNvidiaNemotron3Nano30BBF16FlashInfer(LMEvalMixin, DefaultServerBase):
+    """Test Nemotron-3-Nano-30B BF16 model with lm-eval GSM8K evaluation using flashinfer mamba backend."""
+
+    model = "nvidia/NVIDIA-Nemotron-3-Nano-30B-A3B-BF16"
+    model_config_name = "lm_eval_configs/NVIDIA-Nemotron-3-Nano-30B-A3B-BF16.yaml"
+    other_args = [
+        "--tp-size",
+        "2",
+        "--mamba-backend",
+        "flashinfer",
+    ] + NEMOTRON_3_NANO_THINKING_ARGS
+
+
 class TestNvidiaNemotron3Nano30BFP8(LMEvalMixin, DefaultServerBase):
     """Test Nemotron-3-Nano-30B FP8 model with lm-eval GSM8K evaluation."""
 

test/run_suite.py

@@ -188,7 +188,11 @@ def run_a_suite(args):
     auto_partition_size = args.auto_partition_size
 
     # All tests (per-commit and nightly) are now in registered/
-    files = glob.glob("registered/**/*.py", recursive=True)
+    files = [
+        f
+        for f in glob.glob("registered/**/*.py", recursive=True)
+        if not f.endswith("/conftest.py")
+    ]
     # Strict: all registered files must have proper registration
     sanity_check = True