On Fri, Feb 10, 2012 at 3:12 PM, recrusader <recrusader@gmail.com> wrote:
Dear Jed,

The first example works. However, the example uses MatSetValuesStencil() not MatSetValues(). Are they same?

MatSetValuesStencil() calls MatSetValues(). I suspect that your MPIAIJ matrix does not have the option set to
throw an error when inserting a new nonzero, and your MPICUSP matrix does.

   Matt
 
Thanks a lot,
Yujie

On Fri, Feb 10, 2012 at 2:51 PM, Jed Brown <jedbrown@mcs.anl.gov> wrote:
On Fri, Feb 10, 2012 at 14:49, recrusader <recrusader@gmail.com> wrote:
Since MATMPIAIJ works (I didn't change anything. Just set the vec and mat types to mpicusp and mpiaijcusp for GPU), I think the problem is likely from MatSetValues_MPIAIJ().

Which PETSc examples can test this function?

Try src/ksp/ksp/examples/tutorials/ex43.c and src/snes/examples/tutorials/ex48.c




--
What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.
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