Dear R, Dear all, I do not know. I have isolated the issues. It seem that I have some problem with: CALL MPI_COMM_SPLIT(MPI_COMM_WORLD,colorl,MPIworld%rank,MPI_LOCAL_COMM,MPIworld%iErr) CALL MPI_COMM_RANK(MPI_LOCAL_COMM, MPIlocal%rank,MPIlocal%iErr) CALL MPI_COMM_SIZE(MPI_LOCAL_COMM, MPIlocal%nCPU,MPIlocal%iErr)
openMPI seems not able to create properly MPIlocal%rank. what should be? a bug? thanks again Diego On 3 August 2018 at 19:47, Ralph H Castain <r...@open-mpi.org> wrote: > Those two command lines look exactly the same to me - what am I missing? > > > On Aug 3, 2018, at 10:23 AM, Diego Avesani <diego.aves...@gmail.com> > wrote: > > Dear all, > > I am experiencing a strange error. > > In my code I use three group communications: > MPI_COMM_WORLD > MPI_MASTERS_COMM > LOCAL_COMM > > which have in common some CPUs. > > when I run my code as > mpirun -np 4 --oversubscribe ./MPIHyperStrem > > I have no problem, while when I run it as > > mpirun -np 4 --oversubscribe ./MPIHyperStrem > > sometimes it crushes and sometimes not. > > It seems that all is linked to > CALL MPI_REDUCE(QTS(tstep,:), QTS(tstep,:), nNode, MPI_DOUBLE_PRECISION, > MPI_SUM, 0, MPI_LOCAL_COMM, iErr) > > which works with in local. > > What do you think? Can you please suggestion some debug test? > Is a problem related to local communications? > > Thanks > > > > Diego > > _______________________________________________ > users mailing list > users@lists.open-mpi.org > https://lists.open-mpi.org/mailman/listinfo/users > > > > _______________________________________________ > users mailing list > users@lists.open-mpi.org > https://lists.open-mpi.org/mailman/listinfo/users >
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