TL/UCP: enable linear alltoall

openucx / ucc

Unified Collective Communication Library

https://openucx.github.io/ucc/

BSD 3-Clause "New" or "Revised" License

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TL/UCP: enable linear alltoall #903

Closed Sergei-Lebedev closed 5 months ago

Sergei-Lebedev commented 5 months ago

What

Choose num_posts parameter for alltoall and alltoallv so that progress function posts all send and recv operations immediately for small communicators effectively enabling linear algorithm Parameters are chosen based on previous experiments with HCOLL