[petsc-users] Recommended solver and preconditioner to solve Poisson eqn on win7

[Mark F. Adams]

On Sep 14, 2012, at 8:47 AM, Jed Brown <jedbrown at mcs.anl.gov> wrote:

> On Fri, Sep 14, 2012 at 3:47 AM, TAY wee-beng <zonexo at gmail.com> wrote:
> Hi,
> 
> I need to solve the Poisson eqn on my win7 machine. I'm currently using BCGS without preconditioner. I can't use HYPRE since I'm using Fortran and win7. It's rather slow.
> 
> Is there a recommended solver and preconditioner to solve the Poisson eqn to get me started?
> 
> What discretization?
> 
> Run with -pc_type gamg to start.

and 

-pc_gamg_agg_nsmooths 1

(I should make this the default)

Mark

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