[petsc-users] Fill-in of factorization

[Matthew Knepley]

On Fri, Feb 28, 2014 at 1:59 PM, Jan Blechta <blechta at karlin.mff.cuni.cz>wrote:

> On Fri, 28 Feb 2014 12:30:05 -0800
> Matthew Knepley <knepley at gmail.com> wrote:
>
> > On Fri, Feb 28, 2014 at 12:13 PM, Jan Blechta
> > <blechta at karlin.mff.cuni.cz>wrote:
> >
> > > Hi,
> > >
> > > is it possible to check an amount of fill-in produced during
> > > factorization with PCLU or PCCHOLESKY? Or should I ask the library,
> > > say MUMPS, directly?
> >
> >
> > This is from the PCFactorView():
> >
> >       MatInfo info;
> >       ierr = MatGetInfo(factor->fact,MAT_LOCAL,&info);CHKERRQ(ierr);
>
> MatGetInfo does not seem to be available in petsc4py. Am I grepping
> correctly?
>

It appears to be missing, probably because it passes a struct around.

  Matt


> Jan
>
> >       ierr = PetscViewerASCIIPrintf(viewer,"  factor fill ratio given
> > %g, needed
> >
> %g\n",(double)info.fill_ratio_given,(double)info.fill_ratio_needed);CHKERRQ(ierr);
> >
> >   THanks,
> >
> >      MAtt
> >
> >
> > >
> > > Jan
> > >
> >
> >
> >
>
>


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