coll/tuned: Change the default collective algorithm selection

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The default algorithm selections were out of date and not performing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:

    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 <wilzhang@amazon.com>
(cherry picked from commit ce40cfbaa5)

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This commit is contained in:

William Zhang 2020-05-13 14:03:18 -07:00

parent e08e15cf93

commit 5a13c5352f

1 changed files with 1411 additions and 493 deletions

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ompi/mca/coll/tuned/coll_tuned_decision_fixed.c

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