[petsc-users] which is the best PC for GMRES Poisson solver?

[Jed Brown]

Matthew Knepley <knepley at gmail.com> writes:

> On Mon, Aug 26, 2013 at 2:33 AM, Zhang <zyzhang at nuaa.edu.cn> wrote:
>
>> Hi, Matt
>> BTW,
>>
>> Could you leave me any suggestion of those direct solver PC, such as
>> superLU_dist? Thanks
>
>
> For simple Poisson, I do  not expect direct methods to be competitive with
> MG, however you can
> easily try by configuring with --download-superlu and -pc_type lu
> -pc_factor_mat_solver_package superlu

And by this, Matt means configuring with --download-superlu_dist (or
--download-mumps) and running with -pc_type lu
-pc_factor_mat_solver_package superlu_dist (or mumps).
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