[petsc-dev] PETSc GPU example

[Matthew Knepley]

On Mon, Dec 6, 2021 at 7:02 PM Fande Kong <fdkong.jd at gmail.com> wrote:

> Thanks, Matt
>
> On Mon, Dec 6, 2021 at 4:47 PM Matthew Knepley <knepley at gmail.com> wrote:
>
>> On Mon, Dec 6, 2021 at 6:40 PM Fande Kong <fdkong.jd at gmail.com> wrote:
>>
>>> 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?
>

There is no GPU assembly right now.

  Matt


> OK, I will try to check the solver part
>
> Thanks, again
>
> Fande
>
>
>
>>
>>   Thanks,
>>
>>      Matt
>>
>>
>>> 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/>
>>
>

-- 
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/>
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