TL/UCP: use ring allgather when reordering needed

openucx / ucc

Unified Collective Communication Library

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

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

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Closed Sergei-Lebedev closed 7 months ago

Sergei-Lebedev commented 7 months ago

Use allgather ring algorithm instead of neighbor exchange if ranks reordering is needed