[petsc-users] Recomputing ksp

[Jed Brown]

Michele Rosso <mrosso at uci.edu> writes:

> Hi,
>
> I need to recompute the preconditioner every once in a while. 

KSPSetOperators will update the preconditioner unless KSPSetReusePreconditioner has been set.

> So far I do this "manually", i.e. I destroy ksp and re-create and
> reset it whenever needed.  I am wondering if there is a cleaner way of
> doing this via a PETSc function. I found KSPreset but there are no
> examples about it so I am not sure it is what I am looking for.  Could
> you help please?
>
>
> Thanks,
> Michele
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