I think some MPI impls didn't provide some of the ops on MPI_COMPLEX datatype.
So petsc provides these ops for PetscReal i.e MPIU_SUM, MPIU_MAX, MPIU_MIN Satish On Mon, 17 Aug 2015, Fande Kong wrote: > Hi all, > > I was wondering why, in Petsc, MPI_Reduce with PetscInt needs MPI_SUM > meanwhile MPI_Reduce with PetscReal needs MPIU_SUM? Do we have any special > reasons to distinguish them? > > Thanks, > > Fande Kong, >
