On Wed, Oct 23, 2013 at 12:02 PM, Barrett, Brian W <bwba...@sandia.gov> wrote: > On 10/22/13 10:23 AM, "Jai Dayal" <dayals...@gmail.com> wrote: <snip> > I'm asking because I'm using an open_mpi build ontop of infiniband, and the > maximum thread mode is MPI_THREAD_SINGLE. > > > That doesn't seem right; which version of Open MPI are you using?
The last time I looked at this, OpenMPI only supported MPI_THREAD_SINGLE by default and if you ask for any higher thread level, you get MPI_THREAD_MULTIPLE, which requires a configure-time switch. Maybe something has changed dramatically more recently than I tested. Squyres told me some thread-oriented refactoring was going on. All of this was over a year ago so it is entirely reasonable for me to be wrong about all of this. Jeff -- Jeff Hammond jeff.scie...@gmail.com
