Hello everyone,
I use superlu inside petsc to solve linear systems with symmetrical
matrix. The solving time is at least twice longer than using superlu
directly. Since I'm new with Petsc, I didn't fine-tune much the petsc
solver, as I had done when using superlu directly. For example, in
superlu there are options like diagonal pivot
threshold(superlu_options_t.DiagPivotThresh), symmetric mode
(superlu_options_t.SymmetricMode), and column
permutation(superlu_options_t.ColPerm). Could anybody inform me about
the corresponding options in petsc? Thanks in advance.
BTW, I tried the following options:
MatSetOption(A, MAT_SYMMETRIC, PETSC_TRUE);
MatSetOption(A, MAT_SYMMETRY_ETERNAL, PETSC_TRUE);
But it seems that these options weren't enough to reduce the solving
time sufficiently.
Best regards,
- Longmin Ran
