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

["Matthew Knepley" <knepley@xxxxxxxxx>]

On Jan 2, 2008 1:27 PM, Yujie <recrusader@xxxxxxxxx> wrote:
> 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.

All processors must set the correct block size.

  Matt

> Happy new year:).
>
> Regards,
> Yujie
>
> On 12/21/07, Barry Smith <bsmith@xxxxxxxxxxx> 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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