Mumps speedup by passing symmetric matrix

[Andreas Grassl]

Hello,

solved the 64-32-bit-issue, i have working now MUMPS and gain reasonable
results, but I'm wondering if I could see some performance increasing by using
the symmetry of the matrix. By setting only the option -mat_mumps_sym I don't
see any changes in runtime and INFOG(8) returns 100.

Setting MatSetOption(A,MAT_SYMMETRIC,PETSC_TRUE) I don't see any changes either.

Does MUMPS recognize and use automatically the symmetry?

Cheers,

ando

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