No, it means that each proc will be bound to 4 cores What you have specified is that you want us to run 3 procs on each socket, each proc bound to 4 cores. That is what we will do - as I said, the —bind-to socket directive will be ignored.
> On May 19, 2016, at 1:03 PM, Saliya Ekanayake <esal...@gmail.com> wrote: > > So if bind-to-core is in effect, does that mean it'll run only on 1 core even > though I'd like it to be able to utilize 4 cores. For examples, I'll be > creating 4 threads within the process and would like to pin them to each core > the process has been bound to. > > On Thu, May 19, 2016 at 3:46 PM, Ralph Castain <r...@open-mpi.org > <mailto:r...@open-mpi.org>> wrote: > Perhaps we should error out, but at the moment, PE=4 forces bind-to-core and > so the bind-to socket is being ignored > >> On May 19, 2016, at 12:06 PM, Saliya Ekanayake <esal...@gmail.com >> <mailto:esal...@gmail.com>> wrote: >> >> Hi, >> >> I understand --map-by will determine the process placement whereas --bind-to >> will keep the processes pinned to the given resource. If this understanding >> is correct, then I've got a doubt with the following. >> >> On a node with 2 sockets and 12 cores each, >> >> --map-by ppr:3:socket,PE=4 --bind-to socket >> >> My understanding is that this will give each process 4 cores. Now, with bind >> to socket, does that mean it's possible that within a socket the assgined 4 >> cores for a process may change? Or will they stay in the same 4 cores always? >> >> Thank you, >> Saliya >> >> -- >> Saliya Ekanayake >> Ph.D. Candidate | Research Assistant >> School of Informatics and Computing | Digital Science Center >> Indiana University, Bloomington >> >> _______________________________________________ >> users mailing list >> us...@open-mpi.org <mailto:us...@open-mpi.org> >> Subscription: https://www.open-mpi.org/mailman/listinfo.cgi/users >> <https://www.open-mpi.org/mailman/listinfo.cgi/users> >> Link to this post: >> http://www.open-mpi.org/community/lists/users/2016/05/29243.php >> <http://www.open-mpi.org/community/lists/users/2016/05/29243.php> > > _______________________________________________ > users mailing list > us...@open-mpi.org <mailto:us...@open-mpi.org> > Subscription: https://www.open-mpi.org/mailman/listinfo.cgi/users > <https://www.open-mpi.org/mailman/listinfo.cgi/users> > Link to this post: > http://www.open-mpi.org/community/lists/users/2016/05/29244.php > <http://www.open-mpi.org/community/lists/users/2016/05/29244.php> > > > > -- > Saliya Ekanayake > Ph.D. Candidate | Research Assistant > School of Informatics and Computing | Digital Science Center > Indiana University, Bloomington > > _______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: https://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2016/05/29245.php
