Sorry, forgot to mention: 1.10.1
Open MPI: 1.10.1
Open MPI repo revision: v1.10.0-178-gb80f802
Open MPI release date: Nov 03, 2015
Open RTE: 1.10.1
Open RTE repo revision: v1.10.0-178-gb80f802
Open RTE release date: Nov 03, 2015
OPAL: 1.10.1
OPAL repo revision: v1.10.0-178-gb80f802
OPAL release date: Nov 03, 2015
MPI API: 3.0.0
Ident string: 1.10.1
On 12/09/15 11:26, Gilles Gouaillardet wrote:
Paul, which OpenMPI version are you using ? thanks for providing a simple reproducer, that will make things much easier from now. (and at first glance, that might not be a very tricky bug) Cheers, Gilles On Wednesday, December 9, 2015, Paul Kapinos <kapi...@itc.rwth-aachen.de <mailto:kapi...@itc.rwth-aachen.de>> wrote: Dear Open MPI developers, did OMPIO (1) reached 'usable-stable' state? As we reported in (2) we had some trouble in building Open MPI with ROMIO, which fact was hidden by OMPIO implementation stepping into the MPI_IO breach. The fact 'ROMIO isn't AVBL' was detected after users complained 'MPI_IO don't work as expected with version XYZ of OpenMPI' and further investigations. Take a look at the attached example. It deliver different result in case of using ROMIO and OMPIO even with 1 MPI rank on local hard disk, cf. (3). We've seen more examples of divergent behaviour but this one is quite handy. Is that a bug in OMPIO or did we miss something? Best Paul Kapinos 1) http://www.open-mpi.org/faq/?category=ompio 2) http://www.open-mpi.org/community/lists/devel/2015/12/18405.php 3) (ROMIO is default; on local hard drive at node 'cluster') $ ompi_info | grep romio MCA io: romio (MCA v2.0.0, API v2.0.0, Component v1.10.1) $ ompi_info | grep ompio MCA io: ompio (MCA v2.0.0, API v2.0.0, Component v1.10.1) $ mpif90 main.f90 $ echo hello1234 > out.txt; $MPIEXEC -np 1 -H cluster ./a.out; fileOffset, fileSize 10 10 fileOffset, fileSize 26 26 ierr 0 MPI_MODE_WRONLY, MPI_MODE_APPEND 4 128 $ export OMPI_MCA_io=ompio $ echo hello1234 > out.txt; $MPIEXEC -np 1 -H cluster ./a.out; fileOffset, fileSize 0 10 fileOffset, fileSize 0 16 ierr 0 MPI_MODE_WRONLY, MPI_MODE_APPEND 4 128 -- Dipl.-Inform. Paul Kapinos - High Performance Computing, RWTH Aachen University, IT Center Seffenter Weg 23, D 52074 Aachen (Germany) Tel: +49 241/80-24915 _______________________________________________ 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/2015/12/28145.php
-- Dipl.-Inform. Paul Kapinos - High Performance Computing, RWTH Aachen University, IT Center Seffenter Weg 23, D 52074 Aachen (Germany) Tel: +49 241/80-24915
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