Dear all, thanks a lot. Diego
On Wed, 29 Aug 2018 at 00:13, Nathan Hjelm via users < users@lists.open-mpi.org> wrote: > > Yup. That is the case for all composed datatype which is what the tuple > types are. Predefined composed datatypes. > > -Nathan > > On Aug 28, 2018, at 02:35 PM, "Jeff Squyres (jsquyres) via users" < > users@lists.open-mpi.org> wrote: > > I think Gilles is right: remember that datatypes like > MPI_2DOUBLE_PRECISION are actually 2 values. So if you want to send 1 pair > of double precision values with MPI_2DOUBLE_PRECISION, then your count is > actually 1. > > > On Aug 22, 2018, at 8:02 AM, Gilles Gouaillardet < > gilles.gouaillar...@gmail.com> wrote: > > > Diego, > > > Try calling allreduce with count=1 > > > Cheers, > > > Gilles > > > On Wednesday, August 22, 2018, Diego Avesani <diego.aves...@gmail.com> > wrote: > > Dear all, > > > I am going to start again the discussion about MPI_MAXLOC. We had one a > couple of week before with George, Ray, Nathan, Jeff S, Jeff S., Gus. > > > This because I have a problem. I have two groups and two communicators. > > The first one takes care of compute the maximum vale and to which > processor it belongs: > > > nPart = 100 > > > IF(MPI_COMM_NULL .NE. MPI_MASTER_COMM)THEN > > > CALL MPI_ALLREDUCE( EFFMAX, EFFMAXW, 2, MPI_2DOUBLE_PRECISION, MPI_MAXLOC, > MPI_MASTER_COMM,MPImaster%iErr ) > > whosend = INT(EFFMAXW(2)) > > gpeff = EFFMAXW(1) > > CALL > MPI_BCAST(whosend,1,MPI_INTEGER,whosend,MPI_MASTER_COMM,MPImaster%iErr) > > > ENDIF > > > If I perform this, the program set to zero one variable, specifically > nPart. > > > if I print: > > > IF(MPI_COMM_NULL .NE. MPI_MASTER_COMM)THEN > > WRITE(*,*) MPImaster%rank,nPart > > ELSE > > WRITE(*,*) MPIlocal%rank,nPart > > ENDIF > > > I get; > > > 1 2 > > 1 2 > > 3 2 > > 3 2 > > 2 2 > > 2 2 > > 1 2 > > 1 2 > > 3 2 > > 3 2 > > 2 2 > > 2 2 > > > > 1 0 > > 1 0 > > 0 0 > > 0 0 > > > This seems some typical memory allocation problem. > > > What do you think? > > > Thanks for any kind of help. > > > > > > Diego > > > _______________________________________________ > > users mailing list > > users@lists.open-mpi.org > > https://lists.open-mpi.org/mailman/listinfo/users > > > > -- > Jeff Squyres > jsquy...@cisco.com > > _______________________________________________ > 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
_______________________________________________ users mailing list users@lists.open-mpi.org https://lists.open-mpi.org/mailman/listinfo/users
