Hi, expanding on Noam's problem a bit ...
On Wed, Dec 18, 2013 at 10:19:25AM -0500, Noam Bernstein wrote: > Thanks to all who answered my question. The culprit was an interaction > between > 1.7.3 not supporting mpi_paffinity_alone (which we were using previously) and > the new > kernel. Switching to --bind-to core (actually the environment variable > OMPI_MCA_hwloc_base_binding_policy=core) fixed the problem. > > Noam Thanks for figuring this out. Does this work for 1.6.x as well? The FAQ http://www.open-mpi.org/faq/?category=tuning#using-paffinity covers versions 1.2.x to 1.5.x. Does 1.6.x support mpi_paffinity_alone = 1 ? I set this in openmpi-mca-params.conf but # ompi_info | grep affinity MPI extensions: affinity example MCA paffinity: hwloc (MCA v2.0, API v2.0, Component v1.6.4) MCA maffinity: first_use (MCA v2.0, API v2.0, Component v1.6.4) MCA maffinity: hwloc (MCA v2.0, API v2.0, Component v1.6.4) does not give any indication that this is actually used. Cheers, Martin -- Martin Siegert WestGrid/ComputeCanada Simon Fraser University
