[petsc-users] randomness from MATSOLVERPACKAGE

[Hui Zhang]

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
>