On Thu, Mar 31, 2011 at 01:03:50PM -0400, fa...@email.com wrote: > Hi > I've compiled Open-MPI 1.4.3 with --enable-mpi-threads and I'm always > getting a deadlock when calling mpi_file_set_view. > The Fortran program which calls the routines hasn't opened any extra > thread when the error occurs. > The program works fine when I use (mpi_init instead of mpi_init_thread > (MPI_THREAD_SERIALIZED)) or (start the program with only 1 mpi process) > On abort, I'm getting the backtrace attached below. > > Does anyone know how to fix this?
Even inside MPICH2, I have given little attention to threadsafety and the MPI-IO routines. In MPICH2, each MPI_File* function grabs the big critical section lock -- not pretty but it gets the job done. When ported to OpenMPI, I don't know how the locking works. Furthermore, the MPI-IO library inside OpenMPI-1.4.3 is pretty old. I wonder if the locking we added over the years will help? Can you try openmpi-1.5.3 and report what happens? ==rob -- Rob Latham Mathematics and Computer Science Division Argonne National Lab, IL USA
