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[Perf][Distributed] SM70 NVLink TP4: route sum2 as under a PCIe switch - #49

Merged

Leonccaa merged 2 commits into

mainfrom

f/0.1.5-a1-nvlink-midsize-nccl

Oct 29, 2026

Merged

[Perf][Distributed] SM70 NVLink TP4: route sum2 as under a PCIe switch#49
Leonccaa merged 2 commits into
mainfrom
f/0.1.5-a1-nvlink-midsize-nccl

Commits on Oct 28, 2026
- sm70 nvlink: route TP4 all-reduce by the measured custom/NCCL crossover
  
  Leonccaa
  and
  claude
  committed
  442f851
- sm70 nvlink: keep TP4 all-reduce as before, route only sum2
  
  Leonccaa
  and
  claude
  committed
  6af97fb