On Thu, Mar 1, 2012 at 11:24 AM, Jed Brown <jedbrown at mcs.anl.gov> wrote:
> On Thu, Mar 1, 2012 at 10:40, Derek Gaston <friedmud at gmail.com> wrote: > >> I see, so one of those is the MFFD which really isn't taking up much >> space. I suppose that's why going from 2->3 matrices ~doubled the memory. >> >> So there's probably nothing wrong here... those matrices are needed and >> really do take up that much memory... damn ;-) >> > > When you run with -snes_view, you see the number of nonzeros for all > matrices in the system. Third order elements are really expensive. > You might consider applying this operator matrix-free, and using a low order approximation for the preconditioning matrix. Matt -- 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/20120301/e6d60c5e/attachment.htm>
