Change MPI block size and minor SYCL document update #1015
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Thanks. This looks OK to me. |
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This will update default MPI block size only when "-DUSE_MPI_COLLECTIVE" is enabled. This is default for ALTCPU and SYCL. It has no impact when "-DUSE_MPI_COLLECTIVE" is not set.
The default 512MB for MPI collective may increase file descriptor usage and result in error or lower performance at multi-node scale.
I've erroneously committed in "relion-devel" branch without PR and there is closed PR to wrong "master" branch", sorry about that.