<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class="">I have read the paper some time ago and can give some summary to the mailing list.</div><div class=""><br class=""></div><div class="">The formula is sadly very basic and also does often not even measure even its basic metrics.</div><div class=""><br class=""></div><div class="">The CPU energy for instance is calculates as Thermal Design Power (TDP) * Usage.</div><div class=""><br class=""></div><div class="">Usage is defined as follows: <span style="color: rgb(28, 29, 30); font-family: "Open Sans", icomoon, sans-serif; font-size: 16px; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(255, 255, 255); text-decoration-thickness: initial;" class="">The energy used by the processor was the power draw multiplied by processing time, scaled by the usage factor. However, processing time could not be known a priori and, on some platforms, tracking could be impractical at scale. Modeling exact processing time of past projects may also necessitate re-running jobs, which would generate unnecessary emissions. Therefore, when this processing time is unknown, the simplifying assumption was made that core usage is 100% of run time (</span><i style="box-sizing: border-box; color: rgb(28, 29, 30); font-family: "Open Sans", icomoon, sans-serif; font-size: 16px; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(255, 255, 255); text-decoration-thickness: initial;" class="">u</i><span style="box-sizing: border-box; font-size: 12px; line-height: 0; position: relative; vertical-align: baseline; bottom: -0.25em; color: rgb(28, 29, 30); font-family: "Open Sans", icomoon, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(255, 255, 255); text-decoration-thickness: initial;" class="">c</span><span style="color: rgb(28, 29, 30); font-family: "Open Sans", icomoon, sans-serif; font-size: 16px; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(255, 255, 255); text-decoration-thickness: initial;" class=""> = 1 in Equation (</span><a class="scrollableLink equationLink" href="https://onlinelibrary.wiley.com/doi/10.1002/advs.202100707#advs2603-disp-0001" title="Link to equation" style="box-sizing: border-box; background-color: rgb(255, 255, 255); cursor: pointer; color: rgb(0, 82, 116); font-size: 16px; display: inline; font-weight: 600; font-family: "Open Sans", icomoon, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2;">1</a><span style="color: rgb(28, 29, 30); font-family: "Open Sans", icomoon, sans-serif; font-size: 16px; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(255, 255, 255); text-decoration-thickness: initial;" class="">)).</span></div><div class=""><span style="color: rgb(28, 29, 30); font-family: "Open Sans", icomoon, sans-serif; font-size: 16px; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(255, 255, 255); text-decoration-thickness: initial;" class=""><br class=""></span></div><span class="">Even if they were using the Load*Runtime of the processor it would maybe be a resolution problem involved. They are not too specific on which tool they use with which resolution to get the load.</span><div class=""><span class=""><br class=""></span></div><div class=""><span class="">To be fair: The deal with runtimes of 79h+ for their algorithms, so it probably is less important if you have a 1s or 100ms or less resolution. Given the KDEs scope of sometimes minimal load desktop apps this would pose a problem though I guess.<br class=""></span><span class=""><br class=""></span><br class=""><div class="">
<meta charset="UTF-8" class=""><div dir="auto" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div><div class="">Besten Gruß / Best regards,<br class=""><br class="">Arne Tarara<br class=""><br class=""><b class="">Green Coding Berlin</b></div><div class="">Jablonskistr. 24</div><div class="">10405 Berlin</div><div class=""><br class=""><div class=""><div dir="auto" class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div class=""><span class="" style="font-size: 14px;"><b class="">Tel.</b>: +49 160 947 930 24</span></div><div style="font-size: 14px;" class=""><b class="">Web</b>: <a href="https://www.green-coding.org" class="">https://www.green-coding.org</a></div><div style="font-size: 14px;" class=""><b class="">Github</b>: <a href="https://github.com/green-coding-berlin" class="">https://github.com/green-coding-berlin</a></div></div></div><div style="font-size: 17px;" class=""><b class="" style="font-size: 14px;">Linkedin: </b><span class="" style="font-size: 14px;"><a href="https://www.linkedin.com/in/arne-tarara/" class="">https://www.linkedin.com/in/arne-tarara/</a></span></div></div></div></div></div>
</div>
<div><br class=""><blockquote type="cite" class=""><div class="">On 25. Apr 2022, at 12:58 AM, Julien Moutinho <<a href="mailto:julm+kde@sourcephile.fr" class="">julm+kde@sourcephile.fr</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="">Hi energy-efficiency@,<br class=""><br class="">While reading this article <a href="https://physicsworld.com/a/the-huge-carbon-footprint-of-large-scale-computing/" class="">https://physicsworld.com/a/the-huge-carbon-footprint-of-large-scale-computing/</a><br class="">I've just learnt about this site : <a href="https://green-algorithms.org" class="">https://green-algorithms.org</a><br class="">the associated paper :<br class=""><blockquote type="cite" class="">Green Algorithms: Quantifying the Carbon Footprint of Computation<br class=""></blockquote><a href="https://onlinelibrary.wiley.com/doi/10.1002/advs.202100707" class="">https://onlinelibrary.wiley.com/doi/10.1002/advs.202100707</a><br class="">and the associated source code :<br class="">https://github.com/GreenAlgorithms/green-algorithms-tool<br class=""><br class="">It's focusing on high performance computing and cloud computing<br class="">but there's likely bits of methodology and data<br class="">that may be of interest to you in all that.<br class=""><br class="">Thanks for your work,<br class="">Julien<br class=""></div></div></blockquote></div><br class=""></div></body></html>