Thanks again! I tried --display-devel-map and I think it provides a bit too much info for our needs. However, it is nice to know.
BTW, some interesting behavior in using "--report-bindings --bind-to-core" vs "--display-map". * If I use "--report-bindings --bind-to-core" but the MPI tasks on a host fail to start up, then nothing is reported. For example, I had a problem where a job started across 4 hosts but the hosts could not communicate with one another via TCP/IP. * If I use "--display-map" then the mapping is shown, even in the failure case I mentioned in the last bullet. * What is nice about "--report-bindings --bind-to-core" over "--display-map" is that it will report the binding of each rank to CPU, whereas the latter will show you what ranks are running on a given host. For our needs, this may be sufficient, tho it would be nice to have the CPU bindings shown as well * If using "--report-bindings --bind-to-core" with OpenMPI 1.4.1 then the bindings on just the head node are shown. In 1.6.1, full bindings across all hosts are shown. (I'd have to read release notes on this...) --john -----Original Message----- From: users [mailto:users-boun...@open-mpi.org] On Behalf Of Ralph Castain Sent: Thursday, March 27, 2014 7:01 PM To: Open MPI Users Subject: Re: [OMPI users] Mapping ranks to hosts (from MPI error messages) Oooooooh...it's Jeff's fault! Fwiw you can get even more detailed mapping info with --display-devel-map Sent from my iPhone > On Mar 27, 2014, at 2:58 PM, "Jeff Squyres (jsquyres)" <jsquy...@cisco.com> > wrote: > >> On Mar 27, 2014, at 4:06 PM, "Sasso, John (GE Power & Water, Non-GE)" >> <john1.sa...@ge.com> wrote: >> >> Yes, I noticed that I could not find --display-map in any of the man pages. >> Intentional? > > Oops; nope. I'll ask Ralph to add it... > > -- > Jeff Squyres > jsquy...@cisco.com > For corporate legal information go to: > http://www.cisco.com/web/about/doing_business/legal/cri/ > > _______________________________________________ > 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
