Making NCCL more scalable#139

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YangZhou1997 wants to merge 4 commits intomainfrom

Commits on Jul 3, 2025

Import NCCL 2.27.5-1
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Commits on Jul 4, 2025

fine tune efa/run_nccl_test_mt.sh performance: 32 SMs for 210GB/s on A100 for AtoA
YangZhou1997
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Commits on Jul 6, 2025

try to test how alltoall performance change with NCCL_SHARED_STEPS
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Commits on Jul 7, 2025

Merge remote-tracking branch 'origin' into nccl-mt
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