Hello All, I am using OpenMPI 1.8.4 on my workstation with 2 CPUs, each with 12 processors (6 with hyper-threading). When I run simulations using mpiexec, I'm noticing a strange performance issue. If I run two simulations, each with 6 processors, then everything is fine and 12 processors are under 100% load. When I start a 3rd simulation with 6 processors, I notice throttling in all 3 simulations and only 12 processors are at 100%, the rest are below 10%. My guess is that somehow the processes from the 3rd simulations are doubling onto the already busy processors. How can I be certain that this is the case?
Thanks, namu
