On Wed, Sep 21, 2022 at 7:41 AM feng wang <snails...@hotmail.com> wrote:
> Hello,
>
> I am using Slepc with a shell matrix. The sequential version seems working
> and now I am trying to make it run in parallel.
>
> The partition of the domain is done, I am not sure how to do the halo
> exchange in the shell matrix in Slepc. I have a parallel version of
> matrix-free GMRES in my code with Petsc. I was using VecCreateGhostBlock to
> create vector with ghost cells, and then used VecGhostUpdateBegin/End for
> the halo exchange in the shell matrix, would this be the same for Slepc?
>
That will be enough for the MatMult(). You would also have to use a SLEPc
EPS that only needed MatMult().
Thanks,
Matt
> Thanks,
> Feng
>
>
>
--
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/>
