coll/tuned: Change the default collective algorithm selection #7952
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These changes need to go in on master before they can go in on the v4.1.x branch. |
The master branch changes haven't been merged either so I've been pushing fixes in to both PR's at the same time |
Cool. I just converted this PR to "draft" -- let's leave it as draft until the corresponding master PR has been merged and this PR is therefore ready for v4.1.x. Thanks! |
The default algorithm selections were out of date and not performing
well. After gathering data from OMPI developers, new default algorithm
decisions were selected for:
allgather
allgatherv
allreduce
alltoall
alltoallv
barrier
bcast
gather
reduce
reduce_scatter_block
reduce_scatter
scatter
These results were gathered using the ompi-collectives-tuning package
and then averaged amongst the results gathered from multiple OMPI
developers on their clusters.
You can access the graphs and averaged data here:
https://drive.google.com/drive/folders/1MV5E9gN-5tootoWoh62aoXmN0jiWiqh3
Signed-off-by: William Zhang <[email protected]>
(cherry picked from commit ce40cfb)
Thanks Jeff, PR merged and I updated cherry pick ID. |
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Here's the corresponding master PR: #7730 |
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The default algorithm selections were out of date and not performing
well. After gathering data from OMPI developers, new default algorithm
decisions were selected for:
Signed-off-by: William Zhang [email protected]
(cherry picked from commit ce40cfb)