Re: [OMPI users] 1.7.1 Hang with MPI_THREAD_MULTIPLE set

2013-06-04 Thread Jeff Squyres (jsquyres)
On Jun 4, 2013, at 8:20 AM, W Spector wrote: >> Yes, this is true -- MPI_THREAD_MULITPLE support is fairly incomplete in >> Open MPI. > > One would hope a simple MPI_Barrier call would work though... Underneath, I am pretty sure that barrier is doing an MPI_WAITALL.

Re: [OMPI users] 1.7.1 Hang with MPI_THREAD_MULTIPLE set

2013-06-04 Thread W Spector
On 06/04/2013 03:23 AM, Jeff Squyres (jsquyres) wrote: On Jun 3, 2013, at 5:06 AM, Paul Kapinos wrote: It is more or less well-known that MPI_THREAD_MULTIPLE disable the OpenFabric / InfiniBand networking in Open MPI:

Re: [OMPI users] 1.7.1 Hang with MPI_THREAD_MULTIPLE set

2013-06-04 Thread Jeff Squyres (jsquyres)
On Jun 3, 2013, at 5:06 AM, Paul Kapinos wrote: > It is more or less well-known that MPI_THREAD_MULTIPLE disable the OpenFabric > / InfiniBand networking in Open MPI: > > http://www.open-mpi.org/faq/?category=supported-systems#thread-support >

Re: [OMPI users] 1.7.1 Hang with MPI_THREAD_MULTIPLE set

2013-06-03 Thread Paul Kapinos
Hello, It is more or less well-known that MPI_THREAD_MULTIPLE disable the OpenFabric / InfiniBand networking in Open MPI: http://www.open-mpi.org/faq/?category=supported-systems#thread-support http://www.open-mpi.org/community/lists/users/2010/03/12345.php On our system not only the 'openib'

[OMPI users] 1.7.1 Hang with MPI_THREAD_MULTIPLE set

2013-05-31 Thread W Spector
Dear OpenMPI group, The following trivial program hangs on the mpi_barrier call with 1.7.1. I am using gfortran/gcc 4.6.3 on Ubuntu linux. OpenMPI was built with --enable-mpi-thread-multiple support and no other options (other than --prefix). Are there additional options we should be