Add support for IMPI Thread-Split mode using OpenMP #45
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No need to merge yet, but sharing code here. |
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@stwhite91 when MPI backend create comms thread according to openmp threads, does it be active when communication is not happening? I mean will it interfere with compute ops before and after communican, which also use openmp threads? |
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Sorry I didn't see your comment earlier. No the OpenMP threads I have added here are not active outside of the mpi_all_reduce, there is no problem using OpenMP threads elsewhere in the application. |
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Add BF16 and Float16 datatype support.
Add support for duplicating communicators for each OpenMP thread.
Use OpenMP inside mpi_all_reduce to split msg across threads/comms.
If HANDOFF is defined to 1 at top of coll_mpi.cpp, do not use thread-split.