John & Jed, Got it! Thank you so much for the help.
Best, Shawn On Thu, May 2, 2019, 11:04 Jed Brown <j...@jedbrown.org> wrote: > John Peterson <jwpeter...@gmail.com> writes: > > > On Thu, May 2, 2019 at 12:35 PM Yuxiang Wang <yw...@virginia.edu> wrote: > > > >> Dear all, > >> > >> A quick question - when using libmesh, should I consciously do bandwidth > >> minimization when I number my node IDs? Or, are those taken care of at > >> pre-processing stage of PETSc and other solvers? > >> > > > > I wouldn't try and do anything manually since PETSc has a number of > > renumbering algorithms that I think you can play around with pretty > easily > > to see if they make any difference... > > You can run factorizations in a different ordering, but low-bandwidth > orderings make a difference for cache reuse in MatMult. PETSc can't > reorder that without making a copy. But don't put too much effort into > it. > _______________________________________________ Libmesh-users mailing list Libmesh-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libmesh-users
