> On Mar 25, 2016, at 9:40 AM, Ronald Cohen <recoh...@gmail.com> wrote: > > Thank you! I will try it! > > > What would > -cpus-per-proc 4 -n 16 > do?
This would bind each process to 4 cores, filling each node with procs until the cores on that node were exhausted, to a total of 16 processes within the allocation. > > Ron > --- > Ron Cohen > recoh...@gmail.com > skypename: ronaldcohen > twitter: @recohen3 > > > On Fri, Mar 25, 2016 at 12:38 PM, Ralph Castain <r...@open-mpi.org> wrote: >> Add -rank-by node to your cmd line. You’ll still get 4 procs/node, but they >> will be ranked by node instead of consecutively within a node. >> >> >> >>> On Mar 25, 2016, at 9:30 AM, Ronald Cohen <recoh...@gmail.com> wrote: >>> >>> I am using >>> >>> mpirun --map-by ppr:4:node -n 16 >>> >>> and this loads the processes in round robin fashion. This seems to be >>> twice as slow for my code as loading them node by node, 4 processes >>> per node. >>> >>> How can I not load them round robin, but node by node? >>> >>> Thanks! >>> >>> Ron >>> >>> >>> --- >>> Ron Cohen >>> recoh...@gmail.com >>> skypename: ronaldcohen >>> twitter: @recohen3 >>> >>> --- >>> Ronald Cohen >>> Geophysical Laboratory >>> Carnegie Institution >>> 5251 Broad Branch Rd., N.W. >>> Washington, D.C. 20015 >>> _______________________________________________ >>> 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/2016/03/28828.php >> >> _______________________________________________ >> 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/2016/03/28829.php > _______________________________________________ > 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/2016/03/28830.php
