Hi OpenMPI-developers, When trying to run a program with process binding and oversubscription (on a github actions CI instance) with --bind-to-core, OpenMPI’s mpiexec executes the programs with no issues.
Noting that --bind-to core is more portable (MPICH’s mpiexec also accepts it) and that --bind-to-core is deprecated, I tried switching to it. However, OpenMPI now complains that it cannot perform process binding on OS X with the following message: On OS X, processor and memory binding is not available at all (i.e., the OS does not expose this functionality). Could someone confirm whether OpenMPI supports process binding on OS X and also comment on why --bind-to-core works but --bind-to core doesn’t? Thanks in advance! Thank You, Sajid Ali (he/him) | PhD Candidate Applied Physics Northwestern University s-sajid-ali.github.io
