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[doc] improve debugging code #10206

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youkaichao merged 1 commit into from
Nov 11, 2024
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[doc] improve debugging code #10206

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3 changes: 3 additions & 0 deletions docs/source/getting_started/debugging.rst
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Expand Up @@ -75,6 +75,9 @@ If GPU/CPU communication cannot be established, you can use the following Python

print("PyTorch GLOO is successful!")

if world_size <= 1:
exit()

# Test vLLM NCCL, with cuda graph
from vllm.distributed.device_communicators.pynccl import PyNcclCommunicator

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