<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">There has been some work on this for parallel programs; Wu Feng at Virginia Tech has done some, for example. I don't recall seeing any work that used the profiling interface. Some of the issues raised, especially the required privs, mean that this is only available for experiments, not production, until that changes. Also, its sometimes possible to make predictions about wait times based on previous iterations; that could be used to refine such control.<div><br></div><div>Bill</div><div><br><div><div>
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div style="font-size: 12px; ">William Gropp</div><div style="font-size: 12px; ">Director, Parallel Computing Institute</div><div style="font-size: 12px; ">Deputy Director for Research</div><div style="font-size: 12px; ">Institute for Advanced Computing Applications and Technologies</div></div></div></span><span class="Apple-style-span" style="font-size: 12px; ">Thomas M. Siebel Chair in Computer Science</span><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div style="font-size: 12px; ">University of Illinois Urbana-Champaign</div></div><div><br></div></div></span><br class="Apple-interchange-newline"></span><br class="Apple-interchange-newline">
</div>
<br><div><div>On Jan 16, 2014, at 9:36 PM, Jeff Hammond wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>I was impressed by<br><a href="http://www.hpcadvisorycouncil.com/events/2013/Spain-Workshop/pdf/5_Dell.pdf">http://www.hpcadvisorycouncil.com/events/2013/Spain-Workshop/pdf/5_Dell.pdf</a><br>/ http://www.bsc.es/sites/default/files/public/mare_nostrum/2013hpcac-05.pdf.<br> I wonder if anyone else has seen this, done anything similar, is<br>interested in doing something similar, etc. I can imagine that a more<br>integrated implementation has some performance advantages, albeit at<br>much greater maintenance cost.<br><br>Thanks,<br><br>Jeff<br><br>-- <br>Jeff Hammond<br>jeff.science@gmail.com<br></div></blockquote></div><br></div></div></body></html>