[Feature] Integrate Elastic NIXL-EP into SGLang (#19248)

Signed-off-by: Barak Biber <bbiber@nvidia.com> Signed-off-by: Yoray Zack <yorayz@nvidia.com> Signed-off-by: Itay Alroy <ialroy@nvidia.com> Co-authored-by: Barak Biber <bbiber@nvidia.com>
2026-03-11 17:37:43 +08:00
parent 680d9d98e4
commit 9991debde3
18 changed files with 752 additions and 17 deletions
@@ -0,0 +1,115 @@
+import os
+import time
+import unittest
+from types import SimpleNamespace
+
+from sglang.srt.utils import kill_process_tree
+from sglang.test.few_shot_gsm8k import run_eval as run_eval_few_shot_gsm8k
+from sglang.test.server_fixtures.disaggregation_fixture import get_rdma_devices_args
+from sglang.test.test_utils import (
+    DEFAULT_MODEL_NAME_FOR_TEST_MLA,
+    DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
+    DEFAULT_URL_FOR_TEST,
+    CustomTestCase,
+    popen_launch_server,
+)
+
+TEST_MODEL = os.environ.get("NIXL_EP_TEST_MODEL", DEFAULT_MODEL_NAME_FOR_TEST_MLA)
+os.environ.setdefault("SGLANG_NIXL_EP_NUM_MAX_DISPATCH_TOKENS_PER_RANK", "1024")
+
+ib_devices = get_rdma_devices_args()
+
+NIXL_COMMON = [
+    "--trust-remote-code",
+    "--moe-a2a-backend",
+    "nixl",
+    "--deepep-mode",
+    "low_latency",
+    "--tp",
+    "8",
+    "--mem-fraction-static",
+    "0.78",
+]
+DP_ATTN = ["--dp", "8", "--enable-dp-attention"]
+ELASTIC_NIXL = [
+    "--elastic-ep-backend",
+    "nixl",
+    "--enable-eplb",
+    "--ep-num-redundant-experts",
+    "24",
+]
+ELASTIC_MOONCAKE = [
+    "--elastic-ep-backend",
+    "mooncake",
+    "--mooncake-ib-device",
+    ib_devices,
+    "--enable-eplb",
+    "--ep-num-redundant-experts",
+    "24",
+]
+
+
+class _EPTestBase(CustomTestCase):
+    server_args: list[str] = []
+
+    @classmethod
+    def setUpClass(cls):
+        cls.model = TEST_MODEL
+        cls.base_url = DEFAULT_URL_FOR_TEST
+        cls.process = popen_launch_server(
+            cls.model,
+            cls.base_url,
+            timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
+            other_args=cls.server_args,
+        )
+
+    @classmethod
+    def tearDownClass(cls):
+        kill_process_tree(cls.process.pid)
+        cls.process.wait(timeout=15)
+        time.sleep(2)
+
+    def _run_gsm8k(self):
+        args = SimpleNamespace(
+            num_shots=5,
+            data_path=None,
+            num_questions=200,
+            max_new_tokens=512,
+            parallel=128,
+            host="http://127.0.0.1",
+            port=int(self.base_url.split(":")[-1]),
+        )
+        metrics = run_eval_few_shot_gsm8k(args)
+        print(metrics)
+        return metrics
+
+    def test_gsm8k(self):
+        metrics = self._run_gsm8k()
+        self.assertGreater(metrics["accuracy"], 0.60)
+
+
+class TestNixlEPTP(_EPTestBase):
+    server_args = [*NIXL_COMMON]
+
+
+class TestNixlEPDPAttn(_EPTestBase):
+    server_args = [*NIXL_COMMON, *DP_ATTN]
+
+
+class TestNixlEPElasticEP(_EPTestBase):
+    server_args = [*NIXL_COMMON, *DP_ATTN, *ELASTIC_NIXL]
+
+
+class TestNixlMoeMooncakeElasticEP(_EPTestBase):
+    server_args = [*NIXL_COMMON, *DP_ATTN, *ELASTIC_MOONCAKE]
+
+    pkill_process_1 = "sglang::scheduler_DP1_TP8_EP8"
+
+    def test_gsm8k_fault_1(self):
+        os.system(f"pkill -f {self.pkill_process_1}")
+        metrics = self._run_gsm8k()
+        self.assertGreater(metrics["accuracy"], 0.60)
+
+
+if __name__ == "__main__":
+    unittest.main()