[petsc-users] Preconditioner and number of processors

Xiao, Jianjun (IKET) jianjun.xiao at kit.edu
Thu Apr 17 14:48:53 CDT 2014

Dear developers,

I find the words below in PETSc FAQ.

"Most commonly, you are using a preconditioner which behaves differently based upon the number of processors, such as Block-Jacobi which is the PETSc default."

I am testing the fidelity of my code. I don't want to be disturbed by the different numbers of procs. I know Block-Jacobi may be fast. But currently I don't care the speed. I need a preconditioner which behaves exactly the same with various procs. Which preconditioner should I use?

Thank you.

Best regards

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