[petsc-users] AMG options

[Jarunan Panyasantisuk]

Dear PETSc team,

I have a problem setting options for Hypre/BoomerAMG. I am trying to set 
these options in the code:

1 call PetscOptionsSetValue('-pc_hypre_boomeramg_max_iter','0',ierr)
2 call PetscOptionsSetValue('-pc_hypre_boomeramg_coarsen_type','HMIS',ierr)
3 call PetscOptionsSetValue('-pc_hypre_boomeramg_interp_type','ext+i',ierr)
4 call PetscOptionsSetValue('-pc_hypre_boomeramg_P_max','4',ierr)
5 call PetscOptionsSetValue('-pc_hypre_boomeramg_strong_threshold','4',ierr)

The only option it takes is -pc_hypre_boomeramg_max_iter, the others 
appear as left over options at the end. My questions are:

- Can the options in line 2 to 5 used only on a specific architecture 
e.g. only on a cluster?
- Is there a certain order in setting these options? Can I set it 
anywhere in my code e.g. after set -ksp_type?

The things I am trying to do is to reuse the solvers and preconditioners 
for several equations and reset only their solver/preconds type. If you 
have any advice, I would appreciate.

Thank you in advance
Jarunan

-- 
Development Engineer

ASCOMP GmbH
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