[petsc-users] Convergence is different with different processors

[Matthew Knepley]

On Thu, Feb 7, 2013 at 12:11 AM, w_ang_temp <w_ang_temp at 163.com> wrote:

> Hello,
>     I use the same project, but I find that when different number of
> processors is choosed,
> the convergence is different. For example, when the processors are 4, it
> is divergent; when
> the processors are 8, it is convergent.
>     So what is the reason?
>

It is likely that your preconditioner changed.

   Matt


>     Thanks.
>                                    Jim.
>
>
>


-- 
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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