[OMPI users] Confusing behaviour of compiler wrappers

Hi OpenMPI-community, This is a cross post from the following spack issue : https://github.com/spack/spack/issues/20756 In brief, when I install openmpi@4.1.0 with ucx and xpmem fabrics, the behaviour of the compiler wrappers (mpicc) seems to depend upon the method by which it is loaded into the

[OMPI users] Regarding process binding on OS X with oversubscription

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 --bin

Re: [OMPI users] Regarding process binding on OS X with oversubscription

Hi George, Thanks a lot for the confirmation! When one uses the deprecated `--bind-to-core` option, is OpenMPI silently ignoring this on OS X? Would this be indicated with increased verbosity when using mpiexec? Thank You, Sajid Ali (he/him) | PhD Candidate Applied Physics Northwestern Universit

Re: [OMPI users] Regarding process binding on OS X with oversubscription

Hi George, That clarifies all my questions. Thanks for taking the time to answer them!