how to visit the variable "bs" in pmat of preconditioner

[Yujie]

Dear Barry:

Thank you for your reply. Further problem is whether I only set the block
size of Mat using MatSetBlockSize() in Processor 0 when I run my code on
Cluster? thank a lot.

Happy new year:).

Regards,
Yujie

On 12/21/07, Barry Smith <bsmith at mcs.anl.gov> wrote:
>
>
>     pmat is the matrix you set with KSPSetOperators() so you just need
> to set block size of that matrix.
>
> On Dec 21, 2007, at 1:16 AM, Yujie wrote:
>
> > hi, everyone
> >
> > now, I want to use Hypre package via PETSc in third package. I need
> > to visit the variable "bs" in Mat struct. In hypre.c, this variable
> > may let BoomerAMG know the block size of Mat. The code is as follows:
> >
> > 127: /* special case for BoomerAMG */
> > 128: if (jac->setup == HYPRE_BoomerAMGSetup) {
> > 129: MatGetBlockSize(pc->pmat,&bs);
> > 130: if (bs > 1) {
> > 131: HYPRE_BoomerAMGSetNumFunctions(jac->hsolver,bs);
> > 132: }
> > 133: };
> >
> > However, I can't visit this variable. Now, I have get the pointer of
> > PC I use. I can't visit the variable pmat in my code. I can't find
> > any function to realize this function from PETSc manual.
> > Could you give me some advice about how to do?
> >
> > Merry X'mas!
> >
> > Regards,
> > Yujie
> >
>
>
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