You should add this to your cmd line: --map-by core:pe=4
This will bind each process to 4 cores Sent from my iPhone > On Jun 27, 2014, at 5:22 AM, Luigi Santangelo <luigi.santang...@gmail.com> > wrote: > > 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 the program runs, the top command show me that only 16 core are used. If > I use the previous of OpenMPI (1.6.5) it works fine. Must I set anything in > the new version? Where I wrong? > > Thanks in advance > > Luigi > > _______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2014/06/24712.php
