hwloc represents the merger of libtopology and Portable Linux Processor Affinity (PLPA). I described the project in a blog post here:
http://blogs.cisco.com/ciscotalk/performance/comments/announcing_hwloc_portable_hardware_locality_open_source_software/ The main web site for hwloc is: http://www.open-mpi.org/projects/hwloc/ Enjoy! -- Jeff Squyres jsquy...@cisco.com