Bart, we missed you at the Alaska Weather Symposium this year!<div><br></div><div>The only comment I'll offer is that we were running WRF dmpar using MPICH2 on a Sun Opteron system:</div><div><br></div><div><a href="http://www.arsc.edu/resources/midnight.html">http://www.arsc.edu/resources/midnight.html</a></div>
<div><br></div><div>compiled with PGI and on large problems, especially those with nests, we found intermittent "hang" problems with the scatterv operation of the LBC's to the tasks. On certain domains, the hang would inevitably occur, but not always at the same time. Since we've moved to OpenMPI we haven't had the issue. Other users on this system have experienced the same.</div>
<div><br></div><div>Best,</div><div><br></div><div>Don</div><div><br></div><div><br><br><div class="gmail_quote">On Wed, Mar 16, 2011 at 11:04 AM, Bart Brashers <span dir="ltr"><<a href="mailto:bbrashers@environcorp.com">bbrashers@environcorp.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Has anyone done any benchmark testing of WRF dmpar using OpenMPI vs.<br>
MPICH2? Which one is "better" or "faster"?<br>
<br>
Bart<br>
<br>
<br>
<br>
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