coll/tuned: Change the default collective algorithm selection

The default algorithm selections were out of date and not performing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

Этот коммит содержится в:

William Zhang

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

родитель e08e15cf93

Коммит 5a13c5352f

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coll/tuned: Change the default collective algorithm selection

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