[Perf] Enable Flashinfer autotune by default (#14357)

python/sglang/srt/model_executor/model_runner.py

@@ -2219,11 +2219,15 @@ class ModelRunner:
 
     def _should_run_flashinfer_autotune(self) -> bool:
         """Check if flashinfer autotune should be run."""
-        if not self.server_args.enable_flashinfer_autotune:
+        if self.server_args.disable_flashinfer_autotune:
             return False
 
-        backend_str = self.server_args.attention_backend
-        if backend_str not in ["flashinfer", "trtllm_mla", "trtllm_mha"]:
+        backend_str = self.server_args.moe_runner_backend
+        if backend_str not in [
+            "flashinfer_trtllm",
+            "flashinfer_cutlass",
+            "flashinfer_mxfp4",
+        ]:
             return False
 
         major, _ = torch.cuda.get_device_capability()