I think we'll have problems on all machines with Magny-Cours *and* cpuset/cgroups restricting the number of available processors. Not sure how widely common this is.
I just checked the hwloc v1.2 branch changelog. Nothing really matters for OMPI except the patch I sent below (commit v1.2@3767). The first patch I sent about this bug report (commit v1.2@3772) is not strictly needed because r3767 hides it. All other v1.2 commits after 1.2.1 fix things outside of the core hwloc lib, or bugs that won't happen in OMPI. So doing a 1.2.2 just for OMPI may be a bit overkill. I think you could just apply r3767 (and maybe r3772) on top of 1.2.1 in OMPI. Then I don't know if it really deserves an emergency OMPI 1.5.x release. I was going to write a mail about the roadmap to hwloc-devel, stay tuned, we may change our mind for 1.2.2 :) Brice Le 06/09/2011 16:17, Jeff Squyres a écrit : > Brice -- > > Should I apply that patch to the OMPI 1.5 series, or should we do a hwloc > 1.2.2 release? I.e., is this broken on all AMD/Magny-Cours machines? > > Should I also do an emergency OMPI 1.5.x release with (essentially) just this > fix? (OMPI 1.5.x currently contains hwloc 1.2.0) > > > On Sep 6, 2011, at 1:43 AM, Brice Goglin wrote: > >> Le 05/09/2011 21:29, Brice Goglin a écrit : >>> Dear Ake, >>> Could you try the attached patch? It's not optimized, but it's probably >>> going in the right direction. >>> (and don't forget to remove the above comment-out if you tried it). >> Actually, now that I've seen your entire topology, I found out that the >> real fix is the attached patch. This is actually a Magny-Cours specific >> problem (having 2 NUMA nodes inside each socket is quite unusual). I've >> already committed this patch to hwloc trunk and backported to the v1.2 >> branch. It could be applied in OMPI 1.5.5. >> >> The patch that I sent earlier is not needed as long as cgroups don't >> reduce the available memory (your cgroups don't). I'll fix this other >> bug properly soon. >> >> Brice >> >> <fix-cgroup-vs-magnycours.patch>_______________________________________________ >> users mailing list >> us...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/users >
