[Users] ET on KNL.

[Erik Schnetter]

Eloisa

The general consensus (I heard that as well from TACC staff) is that a KNL
node is about as fast as a modern Xeon node. That agrees with what I
measured on Cori.

The per-core performance is lower (maybe by a factor of two or three)
because the cores are slower, but there are also more cores.

-erik


On Wed, Feb 22, 2017 at 5:53 PM, Haas, Roland <rhaas at illinois.edu> wrote:

> Hello Eloisa,
>
> yup, widely off. David with Erik's help had a try at ET on KNL (stampede)
> and you can find some information here: https://docs.einsteintoolkit.
> org/et-docs/2017_MHD_Workshop
>
> Yours,
> Roland
>
> --
> My email is as private as my paper mail. I therefore support encrypting
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> ________________________________________
> From: users-bounces at einsteintoolkit.org [users-bounces at einsteintoolkit.org]
> on behalf of Eloisa Bentivegna [eloisa.bentivegna at ct.infn.it]
> Sent: Wednesday, February 22, 2017 16:24
> To: Einstein Toolkit Users
> Subject: [Users] ET on KNL.
>
> Dear all,
>
> I was wondering if anybody is using the ET on the Knights Landing
> architecture, and what sort of performance one could expect to get.
> Admittedly without much optimization, I am measuring a performance per
> core which is almost two orders of magnitude smaller than that of a
> Broadwell Xeon. Does this sound wildly off?
>
> Eloisa
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-- 
Erik Schnetter <schnetter at cct.lsu.edu>
http://www.perimeterinstitute.ca/personal/eschnetter/
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