调用vllm里custom all reduce

python/sglang/srt/_custom_ops.py

@@ -22,9 +22,11 @@ use_vllm_custom_allreduce = get_bool_env_var(
 
 if not is_hpu():
     # ROCm does not use vllm custom allreduce
-    if use_vllm_custom_allreduce and not is_hip():
+    # if use_vllm_custom_allreduce and not is_hip():
+    if use_vllm_custom_allreduce:
         try:
             import vllm._C  # noqa: F401
+            print("[DEBUG] ✅ Using vLLM custom allreduce (vllm._C successfully imported)")
         except ImportError as e:
             logger.warning("Failed to import from vllm._C with %r", e)
     else:
@@ -34,9 +36,11 @@ if not is_hpu():
             logger.warning("Failed to import from custom_ar with %r", e)
 
 
-if not is_hip() and not is_npu():
+# if not is_hip() and not is_npu():
+if not is_npu():
     if use_vllm_custom_allreduce:
         custom_op = torch.ops._C_custom_ar
+        print("[DEBUG] ✅ custom_op = torch.ops._C_custom_ar (vLLM path active)")
     else:
         custom_op = sgl_kernel.allreduce
 

python/sglang/srt/distributed/device_communicators/custom_all_reduce.py

@@ -27,7 +27,8 @@ _is_hip = is_hip()
 
 
 try:
-    if ops.use_vllm_custom_allreduce and not _is_hip:
+    # if ops.use_vllm_custom_allreduce and not _is_hip:
+    if ops.use_vllm_custom_allreduce:
         # Use vLLM custom allreduce
         ops.meta_size()
     else:

python/sglang/srt/distributed/parallel_state.py

@@ -1539,7 +1539,6 @@ def initialize_model_parallel(
         group_name="tp",
         pynccl_use_current_stream=duplicate_tp_group,
         torch_compile=torch_compile,
-        use_custom_allreduce = False,
     )
 
     if duplicate_tp_group: