KMP_AFFINITY=balanced is supposed to do that but if it's not working, it might be that the MPI library does not have proper tuning for KNL yet. kevin

I'm trying to test a code using hybrid MPI/OpenMP on the KNL node but haven't been able to successfully set process affinity. I'd like to run four processes in SNC-4 mode with each process being bound to a cluster. Does anyone know if this is possible?

Thanks, Paul