On Tue, Mar 16, 2010 at 2:35 PM, Jed Brown <jed at 59a2.org> wrote: > On Tue, 16 Mar 2010 14:12:03 -0400, Matthew Knepley <knepley at gmail.com> > wrote: > > You have a preconditioner which is ASM, but with a LOT of small > > blocks. You do not save very much by discarding one big block, but if > > you only ever form each small block, you get a lot of savings. > > Unless I misunderstand you, this means that you'll be refactoring each > block on every Krylov iteration. I realize it's a bit less memory, but > that's going to be pretty painful.
If the number one thing is how big a problem can be run, they will tolerate ait. Matt > > Jed -- 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-dev/attachments/20100316/79008756/attachment.html>