[petsc-users] Petsc on AMD EPYC

[Matthew Knepley]

I think to some extent it matters what deal you can get. I got the vendor
to throw in the interconnect if I got the right processors, which overall
was a much better deal for us.

   Matt

On Fri, Mar 19, 2021 at 12:19 PM Blaise A Bourdin <bourdin at lsu.edu> wrote:

> That would be great.
> What would be even greater would be if I could run the same test on LSU
> machines (Xeon 8260).
> Blaise
>
>
> On Mar 19, 2021, at 10:27 AM, Jed Brown <jed at jedbrown.org> wrote:
>
> Blaise A Bourdin <bourdin at lsu.edu> writes:
>
> Hi,
>
> I am pricing out a new small cluster for my group and have been out of the
> HW loop for a while.
> Does anybody on the list have experience running petsc on recent
> generation AMD EPYC?
> I assume that the intel will not generate optimized code for non-intel
> COU. How about gcc / clang?
> My metric is not pure performance but rather performance over price.
>
>
> I have a 2-socket 7452, which is a great price point for our sort of work.
> If you're purely memory bandwidth-limited, you can get fewer cores, but
> that doesn't save a lot of money. You'd probably want to compare pricing
> with the new Zen 3 chips too. I'll forward you a log file from a multigrid
> solver with some analysis. Suffice it to say, it matches to significantly
> outperforms (depending on the operation) a 2-socket Xeon 8280.
>
> I do mostly implicit finite element codes and 90% of my walltime is KSP /
> SNES solves
>
> Regards,
> Blaise
>
> --
> A.K. & Shirley Barton Professor of  Mathematics
> Adjunct Professor of Mechanical Engineering
> Adjunct of the Center for Computation & Technology
> Louisiana State University, Lockett Hall Room 344, Baton Rouge, LA 70803,
> USA
> Tel. +1 (225) 578 1612, Fax  +1 (225) 578 4276 Web
> http://www.math.lsu.edu/~bourdin
>
>
> --
> A.K. & Shirley Barton Professor of  Mathematics
> Adjunct Professor of Mechanical Engineering
> Adjunct of the Center for Computation & Technology
> Louisiana State University, Lockett Hall Room 344, Baton Rouge, LA 70803,
> USA
> Tel. +1 (225) 578 1612, Fax  +1 (225) 578 4276 Web
> http://www.math.lsu.edu/~bourdin
>
>

-- 
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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