[petsc-users] randomness from MATSOLVERPACKAGE

Hui Zhang mike.hui.zhang at hotmail.com
Wed May 30 09:21:45 CDT 2012

> I suspect there are some randomness from external matsolverpackage. I use a parallel matrix
> as preconditioner, and the preconditioner is exactly LU factored, then I saw the KSP (gmres)
> residuals are different from different runs.

Besides, for sequential matrix, there is no such phenomenon, only for parallel matrix.

> Is it true of randomness from matsolverpackage?  Thanks a lot!

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