Petsc + BlockSolve95

[Boulahya Faïza]

Thanks.
 
 I tried something else :
    - creation of the matrix with MatCreateMPIAIJ
    - initialization
    - adding of the options MAT_SYMMETRIC and MAT_SYMMETRY_ETERNAL 
 
When solving in sequential CG + ICC, everything is ok. When I tried in
parallel the same code the options lead to the same error :
[0]PETSC ERROR: MatSetOption_MPIAIJ() line 1251 in
src/mat/impls/aij/mpi/mpiaij.c
[0]PETSC ERROR: No support for this operation for this object type!
[0]PETSC ERROR: unknown option!
[0]PETSC ERROR: MatSetOption() line 4137 in src/mat/interface/matrix.c

Can MatSetOption be only used in sequential?
 
 
Faïza
 

  _____  

De : Matthew Knepley [mailto:knepley at gmail.com] 
Envoyé : mardi 9 mai 2006 18:19
À : petsc-users at mcs.anl.gov
Objet : Re: Petsc + BlockSolve95


I believe there is a problem with the option that you specified. All these
are integers, and it is complaining that the integer does not match
MAT_SYMMETRIC. I will fix the error message to print the offending
option, but please check the code.

  Thanks,

     Matt


On 5/9/06, Boulahya Faïza <F.Boulahya at brgm.fr <mailto:F.Boulahya at brgm.fr> >
wrote: 

Hi All,
 
Has anyone used Conjugate Gradient Solver + Icomplete Cholesky
Preconditionner in parallel case? I tried as said in the manual : I use
MATMPIROWBS for the storage of the matrice. However I get this message :
 
PETSC ERROR: To use incomplete Cholesky
                        preconditioning with a MATMPIROWBS matrix you must
declare it to be
                        symmetric using the option
MatSetOption(A,MAT_SYMMETRIC)!

 
So I tried adding this option (even if in the namual it is written that it
is not required). Then I obtained this message
PETSC ERROR: MatSetOption_MPIRowbs() line 1411 in
src/mat/impls/rowbs/mpi/mpirowbs.c
PETSC ERROR: No support for this operation for this object type!
PETSC ERROR: unknown option!
PETSC ERROR: MatSetOption() line 4137 in src/mat/interface/matrix.c

 
In advance thanks,
 
 
Faïza
 

Pensez à visiter le site BRGM sur.... http://www.brgm.fr/

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