[petsc-users] Correct use of PCFactorSetMatOrderingType

[Edoardo alinovi]

Dear users,

I have a question about the correct use of the option
"PCFactorSetMatOrderingType" in PETSc.

I am solving a problem with 2.5M of unknowns distributed along 16
processors and  I am using the block jacobi preconditioner and MPIAIJ
matrix format. I cannot figure out if the above option can be useful or not
in decreasing the computational time. Any suggestion or tips?

Thank you very much for the kind help

------

Edoardo Alinovi, Ph.D.

DICCA, Scuola Politecnica
Universita' di Genova
1, via Montallegro
16145 Genova, Italy

email: edoardo.alinovi at dicca.unige.it
Tel: +39 010 353 2540
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