On Tue, Aug 4, 2020 at 7:57 PM Anthony Paul Haas <a...@email.arizona.edu>
wrote:
> Hello,
>
> When using Mumps to solve a linear system of equations (see below), can I
> reuse the factorization to solve for multiple RHS, ie, can I use KSPSolve
> multiple
> times while only building a different RHS in between the calls to KSPSolve
> ?
>
Yes. It should detect that you have not changed the operator for the KSP
and thus not refactor the matrix.
Thanks,
Matt
> Thanks,
>
> Anthony
>
> call KSPSetType(self%ksp,KSPPREONLY,self%ierr_ps)
>
> call KSPGetPC(self%ksp,pc,self%ierr_ps)
>
>
>
>
>
> call PCSetType(pc,PCLU,self%ierr_ps)
>
>
>
>
>
> call PCFactorSetMatSolverPackage(pc,MATSOLVERMUMPS,self%ierr_ps)
>
> call PCFactorSetUpMatSolverPackage(pc,self%ierr_ps)
>
--
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/>
