On Thu, Jan 19, 2012 at 19:20, Xuefei (Rebecca) Yuan <xyuan at lbl.gov> wrote:
> Hello, > > I use ksp_view to get the information about the lu pc as follow: > > PC Object: 1 MPI processes > type: lu > LU: out-of-place factorization > tolerance for zero pivot 2.22045e-14 > matrix ordering: nd > factor fill ratio given 0, needed 0 > Factored matrix follows: > Matrix Object: 1 MPI processes > type: seqaij > rows=262144, cols=262144 > package used to perform factorization: superlu > total: nonzeros=0, allocated nonzeros=0 > total number of mallocs used during MatSetValues calls =0 > SuperLU run parameters: > Equil: NO > ColPerm: 3 > IterRefine: 0 > SymmetricMode: NO > DiagPivotThresh: 1 > PivotGrowth: NO > ConditionNumber: YES > RowPerm: 0 > ReplaceTinyPivot: NO > PrintStat: YES > lwork: 0 > linear system matrix = precond matrix: > Matrix Object: 1 MPI processes > type: seqaij > rows=262144, cols=262144 > total: nonzeros=25969216, allocated nonzeros=25969216 > total number of mallocs used during MatSetValues calls =0 > using I-node routines: found 65536 nodes, limit used is 5 > > > In the SuperLU run parameters, how could I change ColPerm:3 to ColPerm has > the value of 2? > $ ./ex2 -pc_type lu -pc_factor_mat_solver_package superlu -help |grep colperm -mat_superlu_colperm <COLAMD> (choose one of) NATURAL MMD_ATA MMD_AT_PLUS_A COLAMD (None) > > Is there any option that I can use to make such a change through PETSc? > > Thanks very much! > > Best regards, > > Rebecca > > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120119/4e878a11/attachment.htm>
