[petsc-users] AMG linear solver with PETSc

[Matthew Knepley]

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 am not sure which Hypre thing you are talking about. Is it the SStruct
stuff?


> (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.
>

Yes, the excellent EXASTEEL project (
http://www.numerik.uni-koeln.de/14079.html) uses Hypre as the coarse grid
solver
for a large scale multiscale, multigrid iteration. Its very impressive and
runs some of the largest problems I have seen for
very complex materials.

  Thanks,

    Matt


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

-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener

https://www.cse.buffalo.edu/~knepley/ <http://www.caam.rice.edu/~mk51/>
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