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Published 20 hours ago • verified publisher icon open-mpi

coll/tuned: Change the bcast default collective algorithm selection

Open jiaxiyan opened this issue 1 year ago • 2 comments

The default algorithm selections were out of date and not performing well. After gathering data using the ompi-collectives-tuning package, new default algorithm decisions are selected for bcast.

See detailed test results in best.txt and detail.txt

jiaxiyan avatar Jan 25 '24 23:01 jiaxiyan

Comparing the new algorithm selection of this PR with the old algorithm selection of openmpi5 using osu_micro_benchmarks

message size < 1KB message size > 1KB
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jiaxiyan avatar Feb 02 '24 19:02 jiaxiyan

The change looks good to me - but mpi4py CI failed. We need to understand the cause.

@bosilca This PR is inspired by yours https://github.com/open-mpi/ompi/pull/9934. Could you please add your review?

wenduwan avatar Feb 13 '24 17:02 wenduwan