Hi, I am trying to do something like below with OpenMPI and OpenMP (threads).
[image: Inline image 1] I was trying to use the explicit thread affinity with GOMP_CPU_AFFINITY environment variable as described here ( https://gcc.gnu.org/onlinedocs/libgomp/GOMP_005fCPU_005fAFFINITY.html). However, both P0 and P1 processes will read the same GOMP_CPU_AFFINITY and will place threads on the same set of cores. Is there a way to overcome this and pass process specific affinity scheme to OpenMP when running with OpenMPI? For example, can I say T0 of P0 should be in Core 0, but T0 of P1 should be Core 4? P.S. I can manually achieve this within the program using *sched_setaffinity()*, but that's not portable. Thank you, Saliya -- Saliya Ekanayake Ph.D. Candidate | Research Assistant School of Informatics and Computing | Digital Science Center Indiana University, Bloomington
