Thanks, Matt On Mon, Dec 6, 2021 at 4:47 PM Matthew Knepley <[email protected]> wrote:

On Mon, Dec 6, 2021 at 6:40 PM Fande Kong <[email protected]> wrote:

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Dear PETSc team,

I am interested in a careful evaluation of PETSc GPU performance in our INL cluster.

Any example in PETSc that can show GPU speedup with solving a nonlinear equation?

I talked to Junchao; he suggested that I try SNES/tutorial/ex56. I tried that, but I could not find any speedup using the GPU. I could attach some results of "log_view" later if we would like to see that.

We should note that you will only see speedup in the solver, so that problem has to be pretty large. I believe Mark has good results with it. The assembly is still all on the CPU. I am working on this over break, and hope to have a CEED version of it by the new year.

Are both function and matrix assmelies on CPU? Or just the matrix assembly? OK, I will try to check the solver part Thanks, again Fande

Thanks,

Matt

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Appreciate any instructions/comments about running a simple PETSc GPU example to get a speedup.

Thanks,

Fande

-- 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.cse.buffalo.edu/~knepley/>