)
Thanks,
Shri
From: petsc-users on behalf of Jed Brown via
petsc-users
Reply-To: Jed Brown
Date: Friday, July 5, 2019 at 9:48 AM
To: Stefano Zampini , Jared Crean
Cc: PETSc users list
Subject: Re: [petsc-users] LU Performance
Stefano Zampini via petsc-users
mailto:petsc-users@mcs.anl.gov
Stefano Zampini via petsc-users writes:
> Jared,
>
> The petsc output shows
>
> package used to perform factorization: petsc
>
> You are not using umfpack, but the PETSc native LU. You can run with
> -options_left to see the options that are not processed from the PETSc
> options database.
When you use Umfpack standalone do you use OpenMP threads? When you use
umfpack alone do you us thread enabled BLAS/LAPACK? Perhaps OpenBLAS or MKL?
You can run both cases with -ksp_view and it will print more details
indicating indicating the solver used.
Do you use the same
