[Test] Split the serving perf tests by topic into basic_perf/ and route their thresholds through a kit (#40505)

test/registered/basic_perf/test_vlm_serving_fa3.py

@@ -0,0 +1,26 @@
+"""VLM serving perf on the fa3 attention backend."""
+
+import unittest
+
+from sglang.test.ci.ci_register import register_cuda_ci
+from sglang.test.kits.vlm_perf_kit import check_vlm_serving_perf
+from sglang.test.test_utils import CustomTestCase
+
+register_cuda_ci(est_time=150, stage="extra-a", runner_config="1-gpu-large")
+
+
+class TestVLMServingFa3(CustomTestCase):
+    def test_vlm_serving_fa3(self):
+        check_vlm_serving_perf(
+            self,
+            "fa3",
+            # No offline bound: never measured on this lane.
+            output_throughput=16700,
+            e2e_ms=11000,
+            ttft_ms=84,
+            itl_ms=5.2,
+        )
+
+
+if __name__ == "__main__":
+    unittest.main()