about KSP based on parallel dense matrix

[Yujie]

Dear Lisandro:

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
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 Dalcín
> ---------------
> Centro Internacional de Métodos Computacionales en Ingeniería (CIMEC)
> Instituto de Desarrollo Tecnológico para la Industria Química (INTEC)
> Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
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>
>
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