Peter, at first glance, your test program looks correct.
can you please try to run mpirun --mca osc pt2pt -np 4 ... I might have identified a bug with the sm osc component. Cheers, Gilles On Tuesday, February 2, 2016, Peter Wind <peter.w...@met.no> wrote: > Enclosed is a short (< 100 lines) fortran code example that uses shared > memory. > It seems to me it behaves wrongly if openmpi is used. > Compiled with SGI/mpt , it gives the right result. > > To fail, the code must be run on a single node. > It creates two groups of 2 processes each. Within each group memory is > shared. > The error is that the two groups get the same memory allocated, but they > should not. > > Tested with openmpi 1.8.4, 1.8.5, 1.10.2 and gfortran, intel 13.0, intel > 14.0 > all fail. > > The call: > call MPI_Win_allocate_shared(win_size, disp_unit, MPI_INFO_NULL, > comm_group, cp1, win, ierr) > > Should allocate memory only within the group. But when the other group > allocates memory, the pointers from the two groups point to the same > address in memory. > > Could you please confirm that this is the wrong behaviour? > > Best regards, > Peter Wind
