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Fallback to hostname when ncclx topology file is missing#2733

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arkadip-maitra wants to merge 1 commit into
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arkadip-maitra:fix_fallback_hostname
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Fallback to hostname when ncclx topology file is missing#2733
arkadip-maitra wants to merge 1 commit into
meta-pytorch:mainfrom
arkadip-maitra:fix_fallback_hostname

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using gethostname() when DEVICE_NAME is missing from NCCL_TOPO_FILE_PATH, so ctran enabled ncclx can initialize on hosts without /etc/fbwhoami

@meta-cla meta-cla Bot added the CLA Signed This label is managed by the Meta Open Source bot. label May 29, 2026
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meta-codesync Bot commented May 29, 2026

This pull request has been imported. If you are a Meta employee, you can view this in D106831696. (Because this pull request was imported automatically, there will not be any future comments.)

@arkadip-maitra arkadip-maitra marked this pull request as ready for review May 30, 2026 08:55
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