[FlashInfer v0.6.16] Support FlashInfer CuTe DSL NVFP4 MoE quantization (#28354)

test/registered/backends/test_flashinfer_nvfp4_online_moe_backend.py

@@ -0,0 +1,136 @@
+import os
+import unittest
+from types import SimpleNamespace
+
+import requests
+
+from sglang.srt.utils import kill_process_tree
+from sglang.test.ci.ci_register import register_cuda_ci
+from sglang.test.run_eval import run_eval
+from sglang.test.test_utils import (
+    DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
+    DEFAULT_URL_FOR_TEST,
+    CustomTestCase,
+    popen_launch_server,
+)
+
+register_cuda_ci(est_time=800, stage="nightly", runner_config="4-gpu-b200")
+
+
+class FlashinferNvFp4OnlineMoeBackendBase:
+    backend = None
+    model = None
+    extra_args = []
+    extra_env = {}
+    eval_args = {}
+    spec_accept_length_threshold = None
+
+    @classmethod
+    def setUpClass(cls):
+        cls.base_url = DEFAULT_URL_FOR_TEST
+        cls.process = popen_launch_server(
+            cls.model,
+            cls.base_url,
+            timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
+            env={**os.environ, **cls.extra_env, "SGLANG_ENABLE_JIT_DEEPGEMM": "False"},
+            other_args=[
+                *cls.extra_args,
+                "--moe-runner-backend",
+                cls.backend,
+                "--cuda-graph-max-bs-decode",
+                "128",
+                "--tp-size",
+                "4",
+                "--ep-size",
+                "4",
+                "--quantization",
+                "nvfp4_online",
+                "--mem-fraction-static",
+                "0.7",
+            ],
+        )
+
+    @classmethod
+    def tearDownClass(cls):
+        kill_process_tree(cls.process.pid)
+
+    def test_gsm8k(self):
+        args = SimpleNamespace(
+            base_url=self.base_url,
+            model=self.model,
+            eval_name="gsm8k",
+            num_examples=200,
+            num_threads=128,
+            **self.eval_args,
+        )
+        metrics = run_eval(args)
+        print(f"{metrics=}")
+        self.assertGreater(metrics["score"], 0.90)
+        if self.spec_accept_length_threshold is not None:
+            server_info = requests.get(self.base_url + "/server_info").json()
+            avg_spec_accept_length = server_info["internal_states"][0][
+                "avg_spec_accept_length"
+            ]
+            print(f"{avg_spec_accept_length=}")
+            self.assertGreater(
+                avg_spec_accept_length, self.spec_accept_length_threshold
+            )
+
+
+# Only this class is affected, but the file runs with failfast, so leaving it
+# enabled also cuts off the class that sorts after it.
+@unittest.skip(
+    "flashinfer-ai/flashinfer#4486: on SM100/SM103 the TRTLLM_GEN tile-192 BMM "
+    "path returns non-finite MoE output from FlashInfer 0.6.16.post4 on, so the "
+    "first real prefill trips the sampler NaN assert and gsm8k scores 0.0. "
+    "See #34629 for the package bisect."
+)
+class TestFlashinferTrtllmGenMoeBackendNvFp4Online(
+    FlashinferNvFp4OnlineMoeBackendBase, CustomTestCase
+):
+    backend = "flashinfer_trtllm"
+    model = "Qwen/Qwen3-30B-A3B-Instruct-2507-FP8"
+    eval_args = {"api": "completion", "max_tokens": 512}
+    extra_env = {
+        "FLASHINFER_NVFP4_4OVER6": "1",
+        "FLASHINFER_NVFP4_4OVER6_ERR_MODE": "MSE",
+        "FLASHINFER_NVFP4_4OVER6_ERR_USE_FAST_MATH": "1",
+        "FLASHINFER_NVFP4_4OVER6_E4M3_USE_256": "1",
+        "SGLANG_FP4_IGNORED_LAYERS": ",".join(
+            ["shared_expert"]
+            + [f"model.layers.{layer_id}" for layer_id in range(40, 48)]
+        ),
+    }
+
+
+class TestFlashinferCuteDSLMoeBackendNvFp4Online(
+    FlashinferNvFp4OnlineMoeBackendBase, CustomTestCase
+):
+    backend = "flashinfer_cutedsl"
+    model = "nvidia/NVIDIA-Nemotron-3-Super-120B-A12B-FP8"
+    extra_args = [
+        "--reasoning-parser",
+        "nemotron_3",
+        "--tool-call-parser",
+        "qwen3_coder",
+        "--speculative-algorithm",
+        "EAGLE",
+        "--speculative-num-steps",
+        "3",
+        "--speculative-eagle-topk",
+        "1",
+        "--speculative-num-draft-tokens",
+        "4",
+    ]
+    eval_args = {"max_tokens": 16000, "temperature": 1.0, "top_p": 0.95}
+    spec_accept_length_threshold = 2.5
+    extra_env = {
+        "FLASHINFER_NVFP4_4OVER6": "1",
+        "FLASHINFER_NVFP4_4OVER6_ERR_MODE": "MSE",
+        "FLASHINFER_NVFP4_4OVER6_ERR_USE_FAST_MATH": "1",
+        "FLASHINFER_NVFP4_4OVER6_E4M3_USE_256": "1",
+    }
+
+
+if __name__ == "__main__":
+    unittest.main()

test/registered/backends/test_flashinfer_trtllm_gen_moe_backend.py

@@ -243,58 +243,6 @@ class FlashinferTrtllmGenMoeBackendNVFP4Base:
         self.assertGreater(metrics["score"], 0.89)
 
 
-class FlashinferTrtllmGenMoeBackendNvFp4OnlineBase:
-    backend = None
-    extra_env = {}
-
-    @classmethod
-    def setUpClass(cls):
-        cls.model = "Qwen/Qwen3-Next-80B-A3B-Instruct-FP8"
-        cls.base_url = DEFAULT_URL_FOR_TEST
-        cls.process = popen_launch_server(
-            cls.model,
-            cls.base_url,
-            timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
-            env={**os.environ, **cls.extra_env, "SGLANG_ENABLE_JIT_DEEPGEMM": "False"},
-            other_args=[
-                "--attention-backend",
-                "triton",
-                "--moe-runner-backend",
-                cls.backend,
-                "--cuda-graph-max-bs-decode",
-                "128",
-                "--tp-size",
-                "4",
-                "--ep-size",
-                "2",
-                "--quantization",
-                "nvfp4_online",
-                "--mem-fraction-static",
-                "0.7",
-                "--mamba-ssm-dtype",
-                "bfloat16",
-            ],
-        )
-
-    @classmethod
-    def tearDownClass(cls):
-        kill_process_tree(cls.process.pid)
-
-    def test_gsm8k(self):
-        args = SimpleNamespace(
-            base_url=self.base_url,
-            model=self.model,
-            eval_name="gsm8k",
-            api="completion",
-            max_tokens=512,
-            num_examples=200,
-            num_threads=128,
-        )
-        metrics = run_eval(args)
-        print(f"{metrics=}")
-        self.assertGreater(metrics["score"], 0.90)
-
-
 class TestFlashinferTrtllmGenMoeBackendFP8(
     FlashinferTrtllmGenMoeBackendFP8Base, CustomTestCase
 ):
@@ -325,6 +273,12 @@ class TestFlashinferTrtllmGenMoeBackendBF16Routed(
     backend = "flashinfer_trtllm_routed"
 
 
+@unittest.skip(
+    "flashinfer-ai/flashinfer#4486: on SM100/SM103 the TRTLLM_GEN tile-192 BMM "
+    "path returns non-finite MoE output from FlashInfer 0.6.16.post4 on, so the "
+    "first real prefill trips the sampler NaN assert and gsm8k scores 0.0. "
+    "See #34629 for the package bisect."
+)
 class TestFlashinferTrtllmGenMoeBackendNvFp4PerTokenActivationRouted(
     FlashinferTrtllmGenMoeBackendNVFP4Base, CustomTestCase
 ):
@@ -332,29 +286,5 @@ class TestFlashinferTrtllmGenMoeBackendNvFp4PerTokenActivationRouted(
     backend = "flashinfer_trtllm_routed"
 
 
-# Only this class is affected, but the file runs with failfast, so leaving it
-# enabled also cuts off the two classes that sort after it.
-@unittest.skip(
-    "flashinfer-ai/flashinfer#4486: on SM100/SM103 the TRTLLM_GEN tile-192 BMM "
-    "path returns non-finite MoE output from FlashInfer 0.6.16.post4 on, so the "
-    "first real prefill trips the sampler NaN assert and gsm8k scores 0.0. "
-    "See #34629 for the package bisect."
-)
-class TestFlashinferTrtllmGenMoeBackendNvFp4Online(
-    FlashinferTrtllmGenMoeBackendNvFp4OnlineBase, CustomTestCase
-):
-    extra_env = {
-        "FLASHINFER_NVFP4_4OVER6": "1",
-        "FLASHINFER_NVFP4_4OVER6_ERR_MODE": "MSE",
-        "FLASHINFER_NVFP4_4OVER6_ERR_USE_FAST_MATH": "1",
-        "FLASHINFER_NVFP4_4OVER6_E4M3_USE_256": "1",
-        "SGLANG_FP4_IGNORED_LAYERS": ",".join(
-            ["shared_expert"]
-            + [f"model.layers.{layer_id}" for layer_id in range(40, 48)]
-        ),
-    }
-    backend = "flashinfer_trtllm"
-
-
 if __name__ == "__main__":
     unittest.main()