processor affinity
Open MPI: Binding to core by default
After years of discussion, the upcoming release of Open MPI 1.7.4 will change how processes are laid out (“mapped”) and bound by default. Here’s the specifics: If the number of processes is <= 2, processes will be mapped by core If the number of processes is > 2, processes…
EuroMPI’13 Cisco slides: Open MPI Process Affinity User Interface
The slides below are from my presentation at EuroMPI’13 about Open MPI’s flexible process affinity interface (in OMPI 1.7.2 and later). I described this system in a prior blog entries (one, two, three), but many people keep asking me about it. Josh Hursey from U. Wisconsin, LaCrosse, wr…
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