[petsc-users] Does MUMPS check the nonzero pattern for each iteration?

[Santos Teixeira Frederico]

Hi,

I am using PETSc with MUMPS and based on the time required for each iteraction (it is almost the same amount of time), I suspect MUMPS is not using the information about the nonzero pattern.
My question is: how do I make sure it is correctly configured? I am already setting "KSPSetOperators(ksp, A, A, SAME_NONZERO_PATTERN)".

Thanks in advance for any tip!

Regards,
 Frederico.