Add dedicated FlashInferCuteDslMoE layer for standard-path FP4 MoE (#21339)

2026-04-10 01:35:56 -07:00
parent 7c6b5c095c
commit c554dc5c64
8 changed files with 1252 additions and 187 deletions
@@ -0,0 +1,149 @@
+"""Backend tests for CuteDSL MoE (FusedMoE + moe_runner, moe_a2a=none).
+
+Exercises the CuteDSL moe_runner path with ModelOpt FP4 by launching a
+server with --moe-runner-backend flashinfer_cutedsl.
+
+Two configurations are tested:
+  - EP=1, TP=4: each GPU holds all experts with TP-sharded intermediate dim
+  - EP=4, TP=4: each GPU holds 1/4 of experts at full intermediate width,
+    partial results combined via all-reduce (no A2A dispatch)
+
+Requires 4 GPUs. Run from repo root with:
+  python -m pytest test/registered/backends/test_deepseek_v3_fp4_cutedsl_moe.py -v -s
+Or via the nightly suite:
+  python test/run_suite.py --hw cuda --suite nightly-4-gpu-b200 --nightly
+"""
+
+import unittest
+from types import SimpleNamespace
+
+from sglang.srt.utils import kill_process_tree
+from sglang.test.ci.ci_register import register_cuda_ci
+from sglang.test.few_shot_gsm8k import run_eval as run_eval_few_shot_gsm8k
+from sglang.test.test_utils import (
+    DEFAULT_URL_FOR_TEST,
+    CustomTestCase,
+    is_in_ci,
+    popen_launch_server,
+    write_github_step_summary,
+)
+
+register_cuda_ci(est_time=900, suite="nightly-4-gpu-b200", nightly=True)
+
+FULL_DEEPSEEK_V3_FP4_MODEL_PATH = "nvidia/DeepSeek-V3-0324-FP4"
+SERVER_LAUNCH_TIMEOUT = 1000
+GSM8K_ACCURACY_THRESHOLD = 0.935
+
+
+class TestDeepseekV3FP4CuteDSLMoE(CustomTestCase):
+    """CuteDSL standard moe_runner path: flashinfer_cutedsl + modelopt_fp4, EP=1."""
+
+    @classmethod
+    def setUpClass(cls):
+        cls.model = FULL_DEEPSEEK_V3_FP4_MODEL_PATH
+        cls.base_url = DEFAULT_URL_FOR_TEST
+        other_args = [
+            "--tp",
+            "4",
+            "--ep",
+            "1",
+            "--mem-fraction-static",
+            "0.75",
+            "--attention-backend",
+            "trtllm_mla",
+            "--moe-runner-backend",
+            "flashinfer_cutedsl",
+            "--quantization",
+            "modelopt_fp4",
+            "--model-loader-extra-config",
+            '{"enable_multithread_load": true}',
+        ]
+        cls.process = popen_launch_server(
+            cls.model,
+            cls.base_url,
+            timeout=SERVER_LAUNCH_TIMEOUT,
+            other_args=other_args,
+        )
+
+    @classmethod
+    def tearDownClass(cls):
+        kill_process_tree(cls.process.pid)
+
+    def test_a_gsm8k(
+        self,
+    ):  # Append an "a" to make this test run first (alphabetically) to warm up the server
+        args = SimpleNamespace(
+            num_shots=8,
+            data_path=None,
+            num_questions=1319,
+            parallel=1319,
+            max_new_tokens=512,
+            host="http://127.0.0.1",
+            port=int(self.base_url.split(":")[-1]),
+        )
+        metrics = run_eval_few_shot_gsm8k(args)
+        if is_in_ci():
+            write_github_step_summary(
+                f"### test_gsm8k (deepseek-v3-fp4-cutedsl-moe)\n"
+                f'{metrics["accuracy"]=:.3f}\n'
+            )
+        self.assertGreater(metrics["accuracy"], GSM8K_ACCURACY_THRESHOLD)
+
+
+class TestDeepseekV3FP4CuteDSLMoEEP4(CustomTestCase):
+    """CuteDSL standard moe_runner path: flashinfer_cutedsl + modelopt_fp4, EP=TP=4."""
+
+    @classmethod
+    def setUpClass(cls):
+        cls.model = FULL_DEEPSEEK_V3_FP4_MODEL_PATH
+        cls.base_url = DEFAULT_URL_FOR_TEST
+        other_args = [
+            "--tp",
+            "4",
+            "--ep",
+            "4",
+            "--mem-fraction-static",
+            "0.75",
+            "--attention-backend",
+            "trtllm_mla",
+            "--moe-runner-backend",
+            "flashinfer_cutedsl",
+            "--moe-a2a-backend",
+            "none",
+            "--quantization",
+            "modelopt_fp4",
+            "--model-loader-extra-config",
+            '{"enable_multithread_load": true}',
+        ]
+        cls.process = popen_launch_server(
+            cls.model,
+            cls.base_url,
+            timeout=SERVER_LAUNCH_TIMEOUT,
+            other_args=other_args,
+        )
+
+    @classmethod
+    def tearDownClass(cls):
+        kill_process_tree(cls.process.pid)
+
+    def test_a_gsm8k(self):
+        args = SimpleNamespace(
+            num_shots=8,
+            data_path=None,
+            num_questions=1319,
+            parallel=1319,
+            max_new_tokens=512,
+            host="http://127.0.0.1",
+            port=int(self.base_url.split(":")[-1]),
+        )
+        metrics = run_eval_few_shot_gsm8k(args)
+        if is_in_ci():
+            write_github_step_summary(
+                f"### test_gsm8k (deepseek-v3-fp4-cutedsl-moe-ep4)\n"
+                f'{metrics["accuracy"]=:.3f}\n'
+            )
+        self.assertGreater(metrics["accuracy"], GSM8K_ACCURACY_THRESHOLD)
+
+
+if __name__ == "__main__":
+    unittest.main()