[petsc-users] AMG linear solver with PETSc

[Mark Adams]

On Mon, Jul 9, 2018 at 10:37 AM Dingwen Tao <dingwen.tao at ieee.org> wrote:

> All,
>
> We have some questions related to Algebraic Multigrid (AMG) method with
> PETSc for solving large-scale systems of linear equations. Anyone with
> experience can help?
>
> Questions:
> (1) We know that PETSc can be used with HYPRE AMG preconditioner for
> solving large-scale linear systems, while HYPRE also has an independent
> multigrid linear solver as well. Anyone knows which one is more
> frequently used in today's HPC applications? Or both of them are very
> commonly used?
>

I'm not sure what you mean either but PETSc has an interface to
Hypre/BoomerAMG which is an AMG solver that is used by a lot of
applications.

PETSc has a native AMG solver GAMG. You should start with either one and
try both.


> (2) Anyone can give us a real HPC application example that uses PETSc with
> HYPRE AMG preconditioner or HYPRE multigrid linear solver? We are looking
> for a real HPC application as our research's motivation.
>

As I said there are lots. Here are two that use PETSc AMG, including hypre
and gamg: https://hbps.pppl.gov/computing/xgc-1 and
https://www.alcf.anl.gov/projects/chombo-crunch-advanced-simulation-subsurface-flow-and-reactive-transport-processes


>
> Many thanks in advance!
>
> Best regards,
>
> Dingwen
>
>
> --
> Dingwen Tao
> Assistant Professor
> The University of Alabama
>
>
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