SBAIJ + hypre preconditioners does not work?

[Hong Zhang]

On Tue, 16 May 2006, Sh.M wrote:

> Ohh I forgot to use the flag -mat_getrow_uppertriangular?

The flg '-mat_getrow_uppertriangular' or MatSetOption(mat,MAT_GETROW_UPPERTRIANGULAR)
are used by Petsc function MatGetRow().

> It seems to be the case. And the Hypre preconditioner will understand that I
> am only providing the upper triangular part of the matrix?

'-mat_getrow_uppertriangular' is not written for
Hypre interface.

Hong


> With best regards, Shaman Mahmoudi
>
> ----- Original Message -----
> From: "Sh.M" <shaman.mahmoudi.7099 at student.uu.se>
> To: <petsc-users at mcs.anl.gov>
> Sent: Tuesday, May 16, 2006 7:23 AM
> Subject: SBAIJ + hypre preconditioners does not work?
>
>
> > Hi,
> >
> > So far I have been using AIJ to construct my matrices and this has been
> due
> > to a legacy more than anything else.
> > However now I do need the extra memory as my problems are getting bigger
> and
> > bigger. So I have tried to use the
> > SBAIJ matrix format with block size = 1. My matrices are read from a file
> > and are symmetric but also "full" due to a legacy.
> > However as I understand I can treat the full matrix as if it was just the
> > upper triangle of it if I use command line
> > -mat_ignore_lower_triangular.
> >
> > It has worked just fine when I for example use solver = CG and
> > preconditioner = Jacobi.
> > However I am getting some errors when using hypre preconditioners, for
> > exampel BoomerAMG.
> > I do know or atleast think by my own past experience with Hypre that
> > symmetric sparse matrix support has not been trivial in Hypre eventhough
> the
> > support was there. Can there be a case of PETSc + Hypre in combinaton
> simple
> > not supporting the SBAIJ matrix format?
> >
> > I am getting this error message and I have tried with different matrices
> > ranging from 54x54 to 5Mx5M and 1-32 CPUs.
> >
> > It crashes when it calls the solve function:
> >
> > [0]PETSC ERROR: MatGetRow_SeqSBAIJ() line 207 in
> > src/mat/impls/sbaij/seq/sbaij.c
> > [0]PETSC ERROR: No support for this operation for this object type!
> > [0]PETSC ERROR: MatGetRow is not supported for SBAIJ matrix format.
> Getting
> > the upper trian\
> > gular part of row, run with -mat_getrow_uppertriangular, call
> > MatSetOption(mat,MAT_GETROW_U\
> > PPERTRIANGULAR) or MatGetRowUpperTriangular()!
> > [0]PETSC ERROR: MatGetRow_MPISBAIJ() line 1056 in
> > src/mat/impls/sbaij/mpi/mpisbaij.c
> > [0]PETSC ERROR: MatGetRow() line 168 in src/mat/interface/matrix.c
> > [0]PETSC ERROR: MatCholeskyCheckShift_inline() line 45 in
> > src/mat/impls/hypre/mhyp.c
> > [0]PETSC ERROR: PCSetUp_HYPRE() line 95 in
> src/ksp/pc/impls/hypre/hyppilut.c
> > [0]PETSC ERROR: PCSetUp() line 798 in src/ksp/pc/interface/precon.c
> > [0]PETSC ERROR: KSPSetUp() line 234 in src/ksp/ksp/interface/itfunc.c
> > [0]PETSC ERROR: KSPSolve() line 334 in src/ksp/ksp/interface/itfunc.c
> > [0]PETSC ERROR: User provided function() line 683 in petscSolver.c
> > [2509 MPI_COMM_WORLD 0] Process exited without calling MPI_Finalize.
> > Fatal error, aborting.
> >
> > With best regards, Shaman Mahmoudi
> >
>
>