On Nov 8, 2012, at 10:17 AM, Blosch, Edwin L wrote: > Thanks, I definitely appreciate the new, hotness of hwloc. I just couldn't > tell from the documentation or the web page how or if it was being used by > OpenMPI. > > I still work with OpenMPI 1.4.x and now that I've looked into the builds, I > think I understand that PLPA is used in 1.4 and hwloc is brought in as an MCA > module in 1.6.x.
Correct. PLPA was a first attempt at a generic processor affinity solution. hwloc is a 2nd generation, much Much MUCH better solution than PLPA (we wholly killed PLPA after the INRIA guys designed hwloc). > Re: layering, I believe you are saying that the relationship to libnuma is > not one where hwloc is adding higher-level functionalities to libnuma, but > rather hwloc is a much improved alternative except for a few system calls it > makes via libnuma out of necessity or convenience. Correct. -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
