You shouldn't use MPI_THREAD_MULTIPLE in Open MPI 1.4.x -- you should upgrade to 1.6. THREAD_MULTIPLE is a bit more robust in the 1.6 series for the TCP BTL. See the README for more info on THREAD_MULTIPLE.
On May 16, 2012, at 7:17 PM, devendra rai wrote: > Hello Community, > > I just finished building an OpenMPI version with custom configuration (1.4.4) > on a server. I do not have root privileges on the server. > > The server already had a "default" version on OpenMPI, which seemed to be > single-threaded: > > ompi_info | grep Thread yields Thread support: posix (mpi: no, progress: no) > > For my custom build, I have MPI thread support (precisely, support for > MPI_THREAD_MULTIPLE): > > /path/to/Custom/OpenMPI/bin/ompi_info | grep Thread yields Thread support: > posix (mpi: yes, progress: no) > > > Thus, I run my application as: > > /path/to/Custom/OpenMPI/bin/mpirun [options]... > > In my application, I do make a check for whether I am getting > MPI_THREAD_MULTIPLE support or not: > > MPI_Init_thread(&argc, &argv, desired_thread_support, > &provided_thread_support);/*Need provided_thread_support = > desired_thread_support*/ > > printf ("MPI: Requested thread support: %d, MPI thread support received: > %d\n", MPI_THREAD_MULTIPLE, provided_thread_support); > > > When I run the application, I get: > > MPI: Requested thread support: 3, MPI thread support received: 0 > > > I have tried lot of things, and I am not sure why this is the case. > > > At the beginning of the shell script which contains > /path/to/Custom/OpenMPI/bin/mpirun [options]..., I set the paths, and > LD_LIBRARY_PATH: > > PATH=/home/raid/private/Customizations_NODELETE/OpenMPI-1.4.4/bin:$PATH > export > LD_LIBRARY_PATH=/home/raid/private/Customizations_NODELETE/gcc-4.6/lib64:/home/Morpheus/.CustomInstalledPrograms/OpenMPI-1.4.4/lib:/home/raid/private/Customizations_NODELETE/gcc-4.6/lib32 > > So, I think that the correct version of mpirun is being used. > > Can someone tell me why I cannot get MPI_THREAD_MULTIPLE support? > > I have the same OpenMPI version on my notebook, which does provide me with > MPI_THREAD_MULTIPLE. > > Thanks a lot. > > Best, > > Devendra > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/