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

[Jed Brown]

On Fri, Sep 14, 2012 at 5:49 PM, Matthew Knepley <knepley at gmail.com> wrote:

> On Fri, Sep 14, 2012 at 5:40 PM, Zhenglun (Alan) Wei <
> zhenglun.wei at gmail.com> wrote:
>
>>  Dear folks,
>>     I did some test with -pc_type gamg with
>> /src/ksp/ksp/example/tutorial/ex45.c. It is not as good as default -pc_type
>> when my mesh (Cartisian) is 100*50*50; while it is a little bit better than
>> the default one when the mesh is 200*100*100. Therefore, I guess this type
>> of pc is good for larger problem. Is that ture? or is there any rule of
>> thumb for this type of preconditioner? BTW, I tested it with 8 processes.
>>
>
> When asking questions about convergence, always always ALWAYS send the
> output of -ksp_monitor -ksp_view. If
> you don't, we are just guessing blindly.
>

And -log_summary because this is about performance.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120914/2b55204d/attachment.html>