llnl / llnl/benchpark

CCL: Add RCCL and NCCL to system.py

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#936 2 comments 0 reactions 1 assignee View on GitHub

@nhanford is already working on this.

Since Jul 29, 2025.

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Description

  • El Capitan
  • Matrix?
  • Sierra
  • Add *CCL tests to osu-microbenchmarks and point at N/RCCL to test. Later will need this in CommBench as well.
  • Does CCL uselib fabric or sockets? How to track?
  • libfabric is automatically enabled when using the WCI wheel
  • to use mainstream wheel, need to set export LD_LIBRARY_PATH=/collab/usr/global/tools/rccl/toss_4_x86_64_ib_cray/rocm-6.4.1/install/lib/:$LD_LIBRARY_PATH
  • Is there a USE_SYSTEM_NCCL flag for PyTorch?

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