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Fix for Open MPI 5#406

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mathomp4 wants to merge 1 commit intomainfrom
bugfix/ompi-mpirun
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Fix for Open MPI 5#406
mathomp4 wants to merge 1 commit intomainfrom
bugfix/ompi-mpirun

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@mathomp4 mathomp4 commented Mar 4, 2026

Testing with Open MPI 5 on discover found that:

  1. Open MPI 5 does not like -flag only --flag
  2. That --map-by node --bind-to core was doing round robin distribution of tasks

The latter one seems to cause issues with GEOS runs on multiple nodes. So we move to just --bind-to core.

@mathomp4 mathomp4 self-assigned this Mar 4, 2026
@mathomp4 mathomp4 requested review from a team as code owners March 4, 2026 20:09
@mathomp4 mathomp4 added the 0 diff The changes in this pull request have verified to be zero-diff with the target branch. label Mar 4, 2026
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