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 >> >> >
