If you weren't at the OMPI developer's meeting last week, you should look at the wiki to see all the things that were discussed and the decisions that were made:
https://svn.open-mpi.org/trac/ompi/wiki/Dec13Meeting One important change is that we decided for v1.7.3 to change OMPI's default mapping and binding scheme: - Mapping: if #procs <= 2, default to map-by core if #procs > 2, default to map-by socket - Binding: default to bind-to core - Ranking (ordering): default to rank-by <obj>, where <obj> is whatever object we mapped against -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/