<div dir="ltr">Eloisa<div><br></div><div>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.</div><div><br></div><div>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.</div><div><br></div><div>-erik</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Feb 22, 2017 at 5:53 PM, Haas, Roland <span dir="ltr"><<a href="mailto:rhaas@illinois.edu" target="_blank">rhaas@illinois.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello Eloisa,<br>
<br>
yup, widely off. David with Erik's help had a try at ET on KNL (stampede) and you can find some information here: <a href="https://docs.einsteintoolkit.org/et-docs/2017_MHD_Workshop" rel="noreferrer" target="_blank">https://docs.einsteintoolkit.<wbr>org/et-docs/2017_MHD_Workshop</a><br>
<br>
Yours,<br>
Roland<br>
<br>
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From: <a href="mailto:users-bounces@einsteintoolkit.org">users-bounces@einsteintoolkit.<wbr>org</a> [<a href="mailto:users-bounces@einsteintoolkit.org">users-bounces@<wbr>einsteintoolkit.org</a>] on behalf of Eloisa Bentivegna [<a href="mailto:eloisa.bentivegna@ct.infn.it">eloisa.bentivegna@ct.infn.it</a>]<br>
Sent: Wednesday, February 22, 2017 16:24<br>
To: Einstein Toolkit Users<br>
Subject: [Users] ET on KNL.<br>
<div class="HOEnZb"><div class="h5"><br>
Dear all,<br>
<br>
I was wondering if anybody is using the ET on the Knights Landing<br>
architecture, and what sort of performance one could expect to get.<br>
Admittedly without much optimization, I am measuring a performance per<br>
core which is almost two orders of magnitude smaller than that of a<br>
Broadwell Xeon. Does this sound wildly off?<br>
<br>
Eloisa<br>
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</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature">Erik Schnetter <<a href="mailto:schnetter@cct.lsu.edu" target="_blank">schnetter@cct.lsu.edu</a>><br><a href="http://www.perimeterinstitute.ca/personal/eschnetter/" target="_blank">http://www.perimeterinstitute.ca/personal/eschnetter/</a></div>
</div>