Will do. My machine is currently quite busy, so it will be a while before I get answers. Stay tuned.
T. Rosmond On Tue, 2012-04-24 at 13:36 -0600, Ralph Castain wrote: > Add --display-map to your mpirun cmd line > > On Apr 24, 2012, at 1:33 PM, Tom Rosmond wrote: > > > Jeff, > > > > Yes, I would be interested in such a plugin. But be advised that I am > > strictly a fortran programmer, so if it requires any C/C++ talent, I > > would be in trouble. So maybe, before jumping into that, I would like > > to be able to look at what processor/node mapping Open-mpi is actually > > giving me. Is there an environmental variable or an MCA option I can > > add to my 'mpirun' command line that would give that to me? I am > > running 1.5.4. > > > > T. Rosmond > > > > > > On Tue, 2012-04-24 at 15:11 -0400, Jeffrey Squyres wrote: > >> On Apr 24, 2012, at 3:01 PM, Tom Rosmond wrote: > >> > >>> My question is this: If the cartesian mapping is done so the two > >>> spacial dimensions are the 'most rapidly varying' in equivalent 1-D > >>> processor mapping, will Open-mpi automatically assign those 2 dimensions > >>> 'on-node', and assign the 'ensemble' dimension as the slowest varying > >>> and across nodes? If not, how can we guarantee this to happen? > >> > >> > >> Sadly, the MPI mapping functions in Open MPI are effectively no-ops -- if > >> you ask for re-ordering, OMPI says "sure!" but then gives you back exactly > >> the same mapping. :-( > >> > >> That being said, the mapping functionality is actually a plugin in Open > >> MPI (in the "topo" framework). It would not be too difficult to write a > >> plugin for the mapping that you want. > >> > >> Would this be of interest to you? I'd be happy to talk you through the > >> process of writing such a plugin. > >> > > > > _______________________________________________ > > 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
