disable ACS

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fo40225 edited this page May 31, 2026 · 1 revision

for BDF in `lspci -d "*:*:*" | awk '{print $1}'`; do
  # skip if it doesn't support ACS
  sudo setpci -v -s ${BDF} ECAP_ACS+0x6.w > /dev/null 2>&1
  if [ $? -ne 0 ]; then
    continue
  fi
  sudo setpci -v -s ${BDF} ECAP_ACS+0x6.w=0000
done

https://docs.nvidia.com/deeplearning/nccl/user-guide/docs/troubleshooting.html#pci-access-control-services-acs