On Jan 30, 2014, at 12:38 AM, Victor <victor.ma...@gmail.com> wrote:
> I use htop and top....and until now I did not make the connection that each > listed process is actually a thread... > > Thus the application that I am running is single threaded. How does that > affect the CPU affinity and rank settings? It affects it very much - there is no value in running a rank on multiple cores in that case. Just do "mpirun --bind-to-core" Threading the app is a mixed bag - it might help, but there is a penalty as well since you have to do all that thread locking. For now, just bind-to-core > <-- as mentioned earlier I am a novice, and very easily confused :-) > > > > On 30 January 2014 15:59, John Hearns <hear...@googlemail.com> wrote: > Ps. 'htop' is a good tool for looking at where processes are running. > > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
