set VLLM_PCIE_USE_CUSTOM_ALLREDUCE=1

f1481fe0 · zhuwenwen · b4bb5ea6 · f1481fe0
Commit f1481fe0 authored Jan 09, 2026 by zhuwenwen
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vllm/envs.py vllm/envs.py +1 -1

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--- a/vllm/envs.py
+++ b/vllm/envs.py
@@ -1563,7 +1563,7 @@ environment_variables: dict[str, Callable[[], Any]] = {
    
    # flag to control vllm to use optimized kernels
    "VLLM_PCIE_USE_CUSTOM_ALLREDUCE":
-    lambda: bool(int(os.environ.get("VLLM_PCIE_USE_CUSTOM_ALLREDUCE", "0"))),
+    lambda: bool(int(os.environ.get("VLLM_PCIE_USE_CUSTOM_ALLREDUCE", "1"))),
    
    # flag to control vllm to use optimized kernels
    "VLLM_CUSTOM_ALLREDUCE_SUPPORTED_WORLDSIZE_MAX":