Re: [OMPI users] OpenMPI 1.8.1 runs more OpenMP Threads on the same core

:) Thanks to both I'll try you solution and I'll give you a feedback Thanks 2014-06-27 15:01 GMT+02:00 : > > > Hi Luigi, > > Please try: > > --map-by slot:pe=4 > > Probably Ralph is very busy, so something sliped his memory... > > Regards, > Tetsuya > > > Hi all, >

[OMPI users] OpenMPI 1.8.1 runs more OpenMP Threads on the same core

Hi all, My system is a 64 core, with Debian 3.2.57 64 bit, GNU gcc 4.7, kernel Linux 3.2.0 and OpenMPI 1.8.1. I developed an application to matching proteins files using OpenMP+OpenMPI. I compiled souce code with -fopenmp flag, I set OMP_NUM_THREADS=4 then I ran binary with mpiexec -np 16. When