[petsc-users] Using GAMG to speed up solving of Poisson eqn

[TAY wee-beng]

Dear Jed,

I'm sorry if I did it wrongly, and thank you for the enlightenment. I am 
running the debugger under VS2008 and after adding the options:

-poisson_ksp_monitor -poisson_pc_gamg_verbose

or

-ksp_monitor -pc_gamg_verbose

I still did not get any additional information. Do you have any suggestion?

Yours sincerely,

TAY wee-beng

On 25/7/2013 3:16 PM, Jed Brown wrote:
> TAY wee-beng <zonexo at gmail.com> writes:
>> /**/call KSPSolve(ksp,b_rhs,xx,ierr)/**/- hang
>> /**/
>> /**/call KSPGetConvergedReason(ksp,reason,ierr)/*
> If there was any question, this commenting style is insane.
>
>> It hangs at */KSPSolve/*, when used with the option :
>>
>> -poisson_pc_gamg_agg_nsmooths 1 -poisson_pc_type gamg
> Run in a debugger so you can find where it "hangs".  Add -ksp_monitor
> -pc_gamg_verbose so you can get more information about what setup steps
> complete successfully.