Hi,thanks, the patch works for me. I will do some further tests and report back if I find another problem.
Best regards, Sebastian On 03/25/2016 01:58 AM, Gilles Gouaillardet wrote:
Sebastian, at first glance, the global lock in romio glue is not necessary. feel free to give the attached patch a try (it works with your example, and i made no further testing) Cheers, Gilles On 3/25/2016 9:26 AM, Gilles Gouaillardet wrote:Sebastian, thanks for the info. bottom line, the global lock is in the OpenMPI glue for ROMIO. i will check what kind of locking (if any) is done in mpich Cheers, Gilles On 3/24/2016 11:30 PM, Sebastian Rettenberger wrote:Hi, I tested this on my desktop machine. Thus, one node, two tasks. It deadlock appears on the local file system and on the nfs mount. The MPICH version I tested was 3.2. However, as far as I know, locking is part of the MPI library and not ROMIO. Best regards, Sebastian On 03/24/2016 03:19 PM, Gilles Gouaillardet wrote:Sebastian, in openmpi 1.10, the default io component is romio from mpich 3.0.4. how many tasks, how many nodes and which file system are you running on ? Cheers, Gilles On Thursday, March 24, 2016, Sebastian Rettenberger <rette...@in.tum.de> wrote:Hi, I tried to run the attached program with OpenMPI. It works well with MPICH and Intel MPI but I get a deadlock when using OpenMPI. I am using OpenMPI 1.10.0 with support for MPI_THREAD_MULTIPLE. It seems like ROMIO uses global locks in OpenMPI which is a problem if multiple threads want to do collective I/O. Any idea how one can get around this issue? Best regards, Sebastian -- Sebastian Rettenberger, M.Sc. Technische Universität München Department of Informatics Chair of Scientific Computing Boltzmannstrasse 3, 85748 Garching, Germany http://www5.in.tum.de/_______________________________________________ users mailing list us...@open-mpi.org Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users Link to this post: http://www.open-mpi.org/community/lists/users/2016/03/28819.php_______________________________________________ users mailing list us...@open-mpi.org Subscription:http://www.open-mpi.org/mailman/listinfo.cgi/users Link to this post:http://www.open-mpi.org/community/lists/users/2016/03/28820.php_______________________________________________ users mailing list us...@open-mpi.org Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users Link to this post: http://www.open-mpi.org/community/lists/users/2016/03/28825.php_______________________________________________ users mailing list us...@open-mpi.org Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users Link to this post: http://www.open-mpi.org/community/lists/users/2016/03/28826.php
-- Sebastian Rettenberger, M.Sc. Technische Universität München Department of Informatics Chair of Scientific Computing Boltzmannstrasse 3, 85748 Garching, Germany http://www5.in.tum.de/
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