[petsc-users] [petsc-dev] How to compute RARt with A and R as distributed (MPI) matrices ?

[Hong]

I add support for MatRARt_MPIAIJ
https://bitbucket.org/petsc/petsc/commits/a3c14138ce0daf4ee55c7c10f1b4631a8ed2f13e

It is in branch hzhang/mpirart.
Let me know your comments.

Hong

On Wed, Jun 21, 2017 at 12:53 PM, Barry Smith <bsmith at mcs.anl.gov> wrote:

>
> > On Jun 21, 2017, at 8:00 AM, Franck Houssen <franck.houssen at inria.fr>
> wrote:
> >
> > How to compute RARt with A and R as distributed (MPI) matrices ?
> >
> > This works with sequential matrices.
> > The doc say "currently only implemented for pairs of AIJ matrices and
> classes which inherit from AIJ": I supposed that MPIAIJ was someway
> inheriting from AIJ, seems that it doesn't.
>
>      Yes, when we say AIJ we mean both SeqAIJ and MPIAIJ. The manual page
> here is wrong, probably because it got copied from MatPtAP page
>
> >
> > Is this kind of matrix product possible with distributed matrices in
> PETSc ? Or is this a known limitation ?
> > Do I go the wrong way to do that (= should use another method) ? If yes,
> what is the correct one ?
> >
> > Franck
> >
> > PS: running debian/testing + gcc-6.3 + bitbucket petsc.
> >
> > >> mpirun -n 2 matRARt.exe seq
> > Mat Object: 1 MPI processes
> >   type: seqaij
> > row 0: (0, 1.)  (1, 0.)
> > row 1: (0, 0.)  (1, 1.)
> >
> > >> mpirun -n 2 matRARt.exe mpi
> > [0]PETSC ERROR: --------------------- Error Message
> --------------------------------------------------------------
> > [0]PETSC ERROR: No support for this operation for this object type
> > [0]PETSC ERROR: Matrix of type <mpiaij> does not support RARt
> >
> > <matRARt.cpp>
>
>
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