<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hello,<div><br><div><div>On Jan 22, 2014, at 19:56 , Jeff Hammond wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>On Wed, Jan 22, 2014 at 12:16 PM, Barrett, Brian W <<a href="mailto:bwbarre@sandia.gov">bwbarre@sandia.gov</a>> wrote:<br><blockquote type="cite">On 1/22/14 11:09 AM, "Jeff Hammond" <<a href="mailto:jeff.science@gmail.com">jeff.science@gmail.com</a>> wrote:<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><blockquote type="cite">On Wed, Jan 22, 2014 at 11:53 AM, Barrett, Brian W <<a href="mailto:bwbarre@sandia.gov">bwbarre@sandia.gov</a>><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">wrote:<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">On 1/22/14 3:41 AM, "Thomas Jahns" <<a href="mailto:jahns@dkrz.de">jahns@dkrz.de</a>> wrote:<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">Hello Maik,<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">On 01/22/14 10:14, maik peterson wrote:<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">thomas, today you should start thinking about other possibilities<br></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">to solve your problem. this mpi rma stuff is crappy.<br></blockquote></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">I guess that very much depends on your kind of machine. We've found it<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">to<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">work<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">very nice with MVAPICH, not so great with PE and OpenMPI.<br></blockquote></blockquote></blockquote></blockquote></div></blockquote><br></div><div>perhaps I should qualify my very brief original statement before it becomes more flammable: MVAPICH gave the best out-of-the-box performance on that particular system (IBM xSeries with FDR IB) and while OpenMPI (on the same machine) did give the desired performance improvements with RMA, base-line performance was lower for some yet undiscovered reason, but system adminstration will look into it. I have no doubt this could have been different. For PE we asked IBM what to do differently but have no final answer so far.</div><div><br></div>Regards, Thomas<br><div apple-content-edited="true"> <span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: 'Day Roman'; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: 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; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div>-- </div><div>Thomas Jahns</div><div>DKRZ GmbH, Department: Application software</div><div><br></div><div>Deutsches Klimarechenzentrum</div><div>Bundesstraße 45a</div><div>D-20146 Hamburg</div><div><br></div><div>Phone: +49-40-460094-151</div><div>Fax: +49-40-460094-270</div><div>Email: Thomas Jahns <<a href="mailto:jahns@dkrz.de">jahns@dkrz.de</a>></div><div><br></div></div></div></span><br class="Apple-interchange-newline"> </div><br></div></body></html>