thank you very much, Hong. On Tue, Sep 23, 2008 at 8:26 AM, Hong Zhang <hzhang at mcs.anl.gov> wrote:
> > Yujie, > > >> Barry has tried to establish an interface for Plapack. However, there are >> some bugs in Plapack. Therefore, it doesn't work. I am wondering if CG in >> > > The Plapack interface in the realeased petsc-2.3.3 should work fine. > Additional work is needed to make it work under reorganization > in petsc-dev, which I'm working on. > > Note, Plapack implements LU precontioner. > > Hong > > Petsc can work with parallel dense matrix. When using the same matrix, >> which >> one is faster, sequential or parallel? thanks. >> >> Regards, >> >> Yujie >> >> On Mon, Sep 22, 2008 at 6:51 PM, Lisandro Dalcin <dalcinl at gmail.com> >> wrote: >> >> Well, any iterative solver will actually work, but expect a really >>> poor scalability :-). I believe (never used dense matrices) that you >>> could use a direct method (PLAPACK?), but again, be prepared for long >>> running times if your problem is (even moderately) large. >>> >>> On Mon, Sep 22, 2008 at 10:35 PM, Yujie <recrusader at gmail.com> wrote: >>> >>>> To my knowledge, PETsc doesn't provide parallel dense matrix-based >>>> >>> solvers, >>> >>>> such as for CG, GMRES and so on. If it is, how to deal with this >>>> problem? >>>> Thanks. >>>> >>>> Regards, >>>> >>>> Yujie >>>> >>>> >>> >>> >>> -- >>> Lisandro Dalc?n >>> --------------- >>> Centro Internacional de M?todos Computacionales en Ingenier?a (CIMEC) >>> Instituto de Desarrollo Tecnol?gico para la Industria Qu?mica (INTEC) >>> Consejo Nacional de Investigaciones Cient?ficas y T?cnicas (CONICET) >>> PTLC - G?emes 3450, (3000) Santa Fe, Argentina >>> Tel/Fax: +54-(0)342-451.1594 >>> >>> >>> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20080923/79b866b3/attachment.htm>
