[petsc-users] reporting failing pcksp solves

[Matthew Knepley]

You can install a convergence test that just calls the default test, and
then does SETERRQ
if it fails.

   Matt

On Fri, Jun 18, 2010 at 11:35 AM, Stephan Kramer <s.kramer at imperial.ac.uk>wrote:

> Dear all,
>
> Is there a way in petsc, when performing inner solves like PCKSP or
> MatSchurComplementGetKSP, to make the outer solve stop immediately and
> report back a negative convergence reason? I find that often when such
> "inner solves" fail, the outer solve happily continues and sometimes falsely
> reports convergence due to the preconditioner becoming rank deficient. I'd
> like our code, using petsc, to be able to trap that sort of situations and
> give a suitable error message.
>
> Cheers
> Stephan
>



-- 
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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