[petsc-users] problem with spooles solver

[Jed Brown]

Spooles is no longer supported. Suggest trying SuperLU, Cholmod, and MUMPS.

On Tue, Sep 25, 2012 at 9:59 AM, De Groof, Vincent Frans Maria <
Vincent.De-Groof at uibk.ac.at> wrote:

>  Hi All,
>
>
> I'm having a problem with the spooles direct solver. I have it working,
> but unfortunately it seems to be lacking robustness. I'm dealing with the
> stiffness matrices of a FE program, where some iterations converge, and for
> others I get an error. It might be important to mention I'm dealing with
> ill-conditioned matrices (condition number ~10^10). Any suggestions to
> solve this problem?
>
>
> thanks.
>
> [0]PETSC ERROR:
> ------------------------------------------------------------------------
> [0]PETSC ERROR: Caught signal number 11 SEGV: Segmentation Violation,
> probably memory access out of range
> [0]PETSC ERROR: Try option -start_in_debugger or -on_error_attach_debugger
> [0]PETSC ERROR: or see
> http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind[0]PETSCERROR: or try
> http://valgrind.org on GNU/linux and Apple Mac OS X to find memory
> corruption errors
> [0]PETSC ERROR: likely location of problem given in stack below
> [0]PETSC ERROR: ---------------------  Stack Frames
> ------------------------------------
> [0]PETSC ERROR: Note: The EXACT line numbers in the stack are not
> available,
> [0]PETSC ERROR:       INSTEAD the line number of the start of the function
> [0]PETSC ERROR:       is given.
> [0]PETSC ERROR: [0] MatFactorNumeric_SeqSpooles line 132
> src/mat/impls/aij/seq/spooles/spooles.c
> [0]PETSC ERROR: [0] MatCholeskyFactorNumeric line 2950
> src/mat/interface/matrix.c
> [0]PETSC ERROR: [0] PCSetUp_Cholesky line 92
> src/ksp/pc/impls/factor/cholesky/cholesky.c
> [0]PETSC ERROR: [0] PCSetUp line 810 src/ksp/pc/interface/precon.c
> [0]PETSC ERROR: [0] KSPSetUp line 182 src/ksp/ksp/interface/itfunc.c
> [0]PETSC ERROR: [0] KSPSolve line 351 src/ksp/ksp/interface/itfunc.c
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120925/e3073065/attachment.html>