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MPI collective functions tuning parameters? #63

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binhudakhalid opened this issue Nov 27, 2022 · 0 comments
Open

MPI collective functions tuning parameters? #63

binhudakhalid opened this issue Nov 27, 2022 · 0 comments

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@binhudakhalid
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In OpenMPI we can select the different algorithms for collective communication functions.

Take the Broadcast function as an example, it has the following implementations: 0 ignore, 1 basic linear, 2 chain, 3: pipeline, 4: split binary tree, 5: binary tree, 6: binomial tree, 7: knomial tree, 8: scatter_allgather, 9: scatter_allgather_ring.

And we can select the implementations by setting '--mca coll_tuned_bcast_algorithm 7'

mpirun --mca coll_tuned_use_dynamic_rules 1 --mca coll_tuned_bcast_algorithm 7 -np 2 ./myprogram

Is there a way in Microsoft MPI to do the same or to change the tuning parameters?

ref: https://www.open-mpi.org/faq/?category=tuning#setting-mca-params

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