On May 30, 2012, at 5:55 PM, Satish Balay wrote: > On Wed, 30 May 2012, Hui Zhang wrote: > >> 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. >> >> Is it true of randomness from matsolverpackage? Thanks a lot! > > Which package?
Either mumps or pastix. > > I've seen mumps showing some differences between runs - but not others.. > > Satish >
