Alfio -- We just released Open MPI v2.0.0, with lots of MPI RMA fixes. Would you mind testing there?
> On Jul 12, 2016, at 1:33 PM, Alfio Lazzaro <alfio.lazz...@gmail.com> wrote: > > Dear OpenMPI developers, > we found a strange behavior when using MPI-RMA passive target and OpenMPI > (versions 1.8.3 and 1.10.2). We don't see any problem when using MPICH. > > This is a small example on what we want to do: > > =================== > program rma_openmpi > use mpi > integer :: nproc, rank, ierr > integer :: win, request, size > INTEGER(kind=mpi_address_kind) :: size_aint, disp_aint > integer, DIMENSION(:), ALLOCATABLE :: meta, recv > > call MPI_INIT(ierr) > call MPI_COMM_SIZE(MPI_COMM_WORLD, nproc, ierr) > call MPI_COMM_RANK(MPI_COMM_WORLD, rank, ierr) > > size=100 > ALLOCATE(meta(size),recv(size)) > meta(:) = rank > recv(:) = -1 > size_aint = size*4 > > call MPI_WIN_CREATE(meta,size_aint,4,MPI_INFO_NULL,MPI_COMM_WORLD,win,ierr) > call MPI_WIN_LOCK_ALL(MPI_MODE_NOCHECK, win, ierr) > > disp_aint = 0 > CALL MPI_RGET(recv,size,MPI_INTEGER,MOD(rank+1,2),disp_aint,& > size,MPI_INTEGER,win,request,ierr) > IF (ierr .NE. 0) STOP "error mpi_rget" > > CALL MPI_WAIT(request,MPI_STATUS_IGNORE,ierr) > IF (ierr .NE. 0) STOP "error mpi_wait" > > ! call MPI_Win_flush_all(win,ierr) > > print *,rank,"=",recv(1) > > call MPI_WIN_UNLOCK_ALL(win, ierr) > call MPI_WIN_FREE(win,ierr) > > DEALLOCATE(meta) > call MPI_FINALIZE(ierr) > end program rma_openmpi > > =================== > > You can run with 2 ranks. > As you can see it is a simple rget operation from the neighbor rank. However, > it seems that the communications doesn't complete after the mpi_wait. Indeed > we get: > > 0 = -1 > 1 = -1 > while it should be: > > 0 = 1 > 1 = 0 > > The code works as we want by uncommenting the flush operation, but we would > expect the same behavior with such a synchronization. > > Thanks for your help! > > Best regards, > > Alfio > > _______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: https://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2016/07/29648.php -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
