Okay, I think the default setting for PCMLMaxNLevelsis 10, so i'm not nearly there. It uses same number of levels (4) for a 64^3 grid and a 200^3 grid. Isn't that strange?
Thanks, 2011/4/20 Jed Brown <jed at 59a2.org> > On Wed, Apr 20, 2011 at 15:35, Leo van Kampenhout < > lvankampenhout at gmail.com> wrote: > >> I was wondering if it is already possible to set the number of levels with >> the ML package. I tried -pc_mg_levels and PCMGSetLevels, both do not work. >> > > -pc_ml_maxnlevels (there is not currently a PCMLSetMaxNLevels()) > > >> >> I have an 8*10^6 Poisson matrix, and so far ML has given me the best >> results. However, I think with increasing the gridsize, i should also >> increase the number of multigrid levels. What are your thoughts? >> > > ML automatically decides the number of levels, subject to the constraint > above. > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-dev/attachments/20110420/05274430/attachment.html>
