[petsc-dev] Kokkos/Crusher perforance

[Mark Adams]

On Tue, Jan 25, 2022 at 11:56 AM Jed Brown <jed at jedbrown.org> wrote:

> Barry Smith <bsmith at petsc.dev> writes:
>
> >   Thanks Mark, far more interesting. I've improved the formatting to
> make it easier to read (and fixed width font for email reading)
> >
> >   * Can you do same run with say 10 iterations of Jacobi PC?
> >
> >   * PCApply performance (looks like GAMG) is terrible! Problems too
> small?
>
> This is -pc_type jacobi.
>
> >   * VecScatter time is completely dominated by SFPack! Junchao what's up
> with that? Lots of little kernels in the PCApply? PCJACOBI run will help
> clarify where that is coming from.
>
> It's all in MatMult.
>
> I'd like to see a run that doesn't wait for the GPU.
>
>
Not sure what you mean. Can I do that?
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