John Mousel <[email protected]> writes: > If I want to use threading but launch multiple MPI processes per node is > there a way to control the affinities on each socket of the node? I see > -threadcomm_affinities, but the documentation is sparse and it's hard for > me to see how a single list of core labels gets the job done for multiple > MPI processes when the core labels are different on the different sockets.
For processes, use your mpiexec to set affinity http://blogs.cisco.com/performance/process-affinity-in-ompi-v1-7-part-1/ https://wiki.mpich.org/mpich/index.php/Using_the_Hydra_Process_Manager (-bind-to -help) My intent is to make (threadcomm) thread affinity number within the mask offered by MPI.
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