There is also SNESMonitorSet() and SNESSetConvergenceTest().
> On May 25, 2021, at 9:25 AM, Matthew Knepley <[email protected]> wrote:
>
> On Tue, May 25, 2021 at 8:41 AM hg <[email protected]
> <mailto:[email protected]>> wrote:
> Hello
>
> I would like to ask if it is possible to add function call before and after
> each iteration of SNES solve, e.g. InitializeNonLinearIteration and
> FinalizeNonLinearIteration. It is particularly useful for debugging the
> constitutive law or for post-processing to post the intermediate results.
>
> There is this:
> https://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/SNES/SNESSetUpdate.html
>
> <https://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/SNES/SNESSetUpdate.html>
>
> Thanks,
>
> Matt
>
> Best
> Giang
> --
> 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
>
> https://www.cse.buffalo.edu/~knepley/ <http://www.cse.buffalo.edu/~knepley/>
