[CI] Add DSV4 Flash disaggregation test (#24973)

Signed-off-by: Shangming Cai <csmthu@gmail.com>

test/registered/distributed/test_disaggregation_dsv4.py

@@ -0,0 +1,140 @@
+import unittest
+from types import SimpleNamespace
+
+from sglang.test.ci.ci_register import register_cuda_ci
+from sglang.test.run_eval import run_eval
+from sglang.test.server_fixtures.disaggregation_fixture import (
+    PDDisaggregationServerBase,
+)
+from sglang.test.test_utils import (
+    DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
+    popen_launch_pd_server,
+    try_cached_model,
+)
+
+register_cuda_ci(est_time=250, suite="stage-c-test-dsv4-8-gpu-h200")
+
+DSV4_FLASH_MODEL = "sgl-project/DeepSeek-V4-Flash-FP8"
+
+DEEPEP_CONFIG = '{"normal_dispatch":{"num_sms":96},"normal_combine":{"num_sms":96}}'
+
+DSV4_FLASH_ENV = {
+    "SGLANG_DSV4_FP4_EXPERTS": "0",
+    "SGLANG_DEEPEP_NUM_MAX_DISPATCH_TOKENS_PER_RANK": "256",
+}
+
+_EAGLE_SPEC_ARGS = [
+    "--speculative-algorithm",
+    "EAGLE",
+    "--speculative-num-steps",
+    "1",
+    "--speculative-eagle-topk",
+    "1",
+    "--speculative-num-draft-tokens",
+    "2",
+]
+
+
+class TestDisaggregationDSV4(PDDisaggregationServerBase):
+    @classmethod
+    def setUpClass(cls):
+        super().setUpClass()
+
+        cls.model = try_cached_model(DSV4_FLASH_MODEL)
+
+        cls.start_prefill()
+        cls.start_decode()
+
+        cls.wait_server_ready(cls.prefill_url + "/health", process=cls.process_prefill)
+        cls.wait_server_ready(cls.decode_url + "/health", process=cls.process_decode)
+
+        cls.launch_lb()
+
+    @classmethod
+    def start_prefill(cls):
+        prefill_args = [
+            "--trust-remote-code",
+            "--disaggregation-mode",
+            "prefill",
+            "--disaggregation-bootstrap-port",
+            cls.bootstrap_port,
+            "--tp",
+            4,
+            "--dp",
+            4,
+            "--enable-dp-attention",
+            "--moe-a2a-backend",
+            "deepep",
+            "--deepep-config",
+            DEEPEP_CONFIG,
+            "--cuda-graph-max-bs",
+            "128",
+            "--max-running-requests",
+            "256",
+            "--mem-fraction-static",
+            "0.7",
+            *_EAGLE_SPEC_ARGS,
+        ]
+        prefill_args += cls.transfer_backend + cls.rdma_devices
+        cls.process_prefill = popen_launch_pd_server(
+            cls.model,
+            cls.prefill_url,
+            timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
+            other_args=prefill_args,
+            env=DSV4_FLASH_ENV,
+        )
+
+    @classmethod
+    def start_decode(cls):
+        decode_args = [
+            "--trust-remote-code",
+            "--disaggregation-mode",
+            "decode",
+            "--disaggregation-bootstrap-port",
+            cls.bootstrap_port,
+            "--tp",
+            4,
+            "--dp",
+            4,
+            "--enable-dp-attention",
+            "--base-gpu-id",
+            4,
+            "--moe-a2a-backend",
+            "deepep",
+            "--deepep-config",
+            DEEPEP_CONFIG,
+            "--cuda-graph-max-bs",
+            "128",
+            "--max-running-requests",
+            "256",
+            "--mem-fraction-static",
+            "0.7",
+            *_EAGLE_SPEC_ARGS,
+        ]
+        decode_args += cls.transfer_backend + cls.rdma_devices
+        cls.process_decode = popen_launch_pd_server(
+            cls.model,
+            cls.decode_url,
+            timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
+            other_args=decode_args,
+            env=DSV4_FLASH_ENV,
+        )
+
+    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"Evaluation metrics: {metrics}")
+
+        self.assertGreater(metrics["score"], 0.95)
+
+
+if __name__ == "__main__":
+    unittest.main()