<div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Jun 16, 2021 at 2:16 PM Prentice Bisbal via Beowulf <<a href="mailto:beowulf@beowulf.org">beowulf@beowulf.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Last fall I evaluated potential new cluster nodes for a large cluster <br>
purchase using the HPL benchmark. I compared a server with dual AMD EPYC <br>
7H12 processors (128) cores to a server with quad Intel Xeon 8268 <br>
processors (96 cores). I measured 5,389 GFLOPS for the Xeon 8268, and <br>
only 3,446.00 GFLOPS for the AMD 7H12. That's LINPACK score that only <br>
64% of the Xeon 8268 system, despite having 33% more cores.<br></blockquote><div><br></div><div>Most of the workloads we see on our clusters have arithmetic intensities much lower than LINPACK's, so all that extra compute gets starved by lack of memory bandwidth.</div></div></div>