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

[TAY wee-beng]

Ops, sorry, I just built the newest version but its environment variable 
is still not changed. I have restarted it. Now :

-poisson_pc_gamg_agg_nsmooths 1 -poisson_pc_type gamg

hangs there for more than 10 mins.

Same for

-poisson_pc_type gamg -poisson_pc_gamg_agg_nsmooths 1 
-poisson_mg_levels_ksp_type richardson -poisson_mg_levels_pc_type sor

and

-poisson_pc_type gamg -poisson_pc_gamg_agg_nsmooths 1 
-poisson_mg_levels_ksp_type richardson -poisson_mg_levels_pc_type sor

Yours sincerely,

TAY wee-beng

On 20/7/2013 6:03 PM, Jed Brown wrote:
> TAY wee-beng <zonexo at gmail.com> writes:
>
>> I've used the latest 3.4.2.
> No, you are not.
>
> [0]PETSC ERROR: Petsc Development HG revision:
> 9850aeb5d33f0b33bc931843c4b3b3b4f8df6a3b  HG Date: Tue Oct 02 22:18:53
> 2012 -0500
>
> /**/[0]PETSC ERROR:
> C:\Obj_tmp\ibm3d_high_Re_staggered_AB2\Debug\ibm3d_high_Re_staggered_AB2.exe
> on a petsc-3.3 named USER-PC by User Sat Jul 20 15:37:40 2013/**/
> /**/[0]PETSC ERROR: Libraries linked from
> /cygdrive/d/wtay/Lib/petsc-3.3-dev_win32_vs2008/lib/**/
> /**/[0]PETSC ERROR: Configure run at Thu Oct  4 10:01:13 2012/**/
> /**/[0]PETSC ERROR: Configure options --with-cc="win32fe cl"
> --with-fc="win32fe ifort" --with-cxx="win32fe cl"
> --with-mpi-dir=/cygdrive/c/MPICH2/ --download-f-blas-lapack=1
> --prefix=/cygdrive/d/wtay/Lib/petsc-3.3-dev_win32_vs2008
> --with-debugging=1 --useThreads=0/**/
>
>
>> What else do I need to provide?
> You are either intentionally or accidentally running an old PETSc.  I
> suspect an environment problem before any sort of code problem, so
> please get your versions straight first.