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@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

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________________________________________
From: users-bounces@einsteintoolkit.org [users-bounces@einsteintoolkit.org] on behalf of Eloisa Bentivegna [eloisa.bentivegna@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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