PCASM with multiple subdomains per process. PCGAMG coarse levels. On Jan 25, 2012 12:37 PM, "Matthew Knepley" <knepley at gmail.com> wrote:
> On Wed, Jan 25, 2012 at 12:29 PM, Dominik Szczerba <dominik at > itis.ethz.ch>wrote: > >> >> I recently realized that, independently of my explicitly partitioning >> >> the input mesh, Petsc also employs partitioning somewhere internally. >> > >> > >> > We don't unless you tell us to. >> >> Can you please expand? I am partitioning my input unstructured mesh to >> distribute dofs throughout the processes, and then I am setting up my >> MPI matricess "as usual", not intending any calls to parmetis or other >> partitioning functions... So where can I tell or not tell Petsc to use >> partitioning here or not? >> > > Unless you create a MatPartitioning object, we do not call ParMetis. > > Matt > > >> Many thanks >> Dominik >> > > > > -- > 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 > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120125/e03b77c8/attachment.htm>
