<div dir="ltr">Ryan and John thank you for your answers!</div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Wed, 8 Jan 2025 at 14:39, John Zuhone <<a href="mailto:jzuhone@gmail.com">jzuhone@gmail.com</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"><div><div dir="ltr">
Hi Ernesto,</div><div dir="ltr"><br></div><div dir="ltr">Yes, typically HPC resources will allow you to request a small start-up allocation in order to do such scaling tests on their own machine before you ask for a larger allocation to do production runs. I imagine that they will be very reluctant to accept a scaling test from another architecture. </div><div dir="ltr"><br></div><div dir="ltr">Best,</div><div dir="ltr"><br></div><div dir="ltr">John ZuHone</div>
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<div dir="ltr" class="gmail_attr">On Jan 8, 2025 at 12:34:20 PM, Ryan Farber <<a href="mailto:rjfarber@umich.edu" target="_blank">rjfarber@umich.edu</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" type="cite">
<div><div></div><div dir="auto">Hi Ernesto,<div><br></div><div>You should perform your scaling study on the machine itself and *not* recycle old scaling plots, as the scaling will depend on the properties of the machine (e.g., interconnect hardware, specific MPI library plus wrapper (intel vs gcc etc)).</div><div><br></div><div>But for inspiration, you can search the FLASH mailing list archive and I think circa 2016 Sean Couch still has the most impressive scaling plot I’ve seen.</div><div><br></div><div>Best wishes,</div><div>Ryan<br><br><div dir="ltr">Sent from my iPhone</div><div dir="ltr"><br><blockquote type="cite">On 8. Jan 2025, at 06:05, ERNESTO ZURBRIGGEN <<a href="mailto:ezurbriggen@unc.edu.ar" target="_blank">ezurbriggen@unc.edu.ar</a>> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr">Hello everyone! <div>I am writing a proposal for HCP computing in a cluster with FLASH as the main code to be used. And I was wondering where I can find an MPI scalability test to include in the proposal. This is mandatory in the call. </div><div><br></div><div>I thought I had seen a scalability plot in the user manual, but I can't find it. </div><div><br></div><div>Best regards! </div></div><div><br clear="all"></div><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div dir="ltr" style="font-style:inherit;font-variant:inherit;font-weight:inherit;margin:0px;padding:0px;border:0px;font-stretch:inherit;line-height:inherit;vertical-align:baseline"><font face="monospace" color="#666666"><font style="background-color:rgb(234,209,220)"><font><span style="font-style:inherit;font-variant:inherit;font-weight:inherit;font-stretch:inherit;line-height:inherit;margin:0px;padding:0px;border:0px;vertical-align:baseline"><div style="font-style:inherit;font-variant:inherit;font-weight:inherit;font-stretch:inherit;line-height:inherit;margin:0px;padding:0px;border:0px;vertical-align:baseline"><i 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