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Hi Yaoping,<br>
<br>
What parallelization option did you compile WRF with (e.g. MPI
only)? Also, I've found the Intel compilers to be 3 times faster
than the GNU compilers on some WRF configurations (unfortunately).
What compiler did you use?<br>
<br>
You may also want to experiment using less than the number of total
cores on the machine. For example, you could try using 44 cores
instead of 48. I think WRF EMS is set to do this by default. I've
verified on some of my multi-core machines that this does indeed
reduce the runtime.<br>
<br>
Cheers,<br>
Mike<br>
<br>
<br>
<div class="moz-cite-prefix">On 09/01/2016 03:15 PM, Carlos Ross
wrote:<br>
</div>
<blockquote
cite="mid:CAMCa-Quf8n9EDb7ZpxtRU_RD9ABquyrdpTquW0sD8LfB=n-_ng@mail.gmail.com"
type="cite">
<div dir="ltr">I think it should be faster, <span
style="color:rgb(0,0,0);font-family:mangal,sans-serif;font-size:13.3333px">Xeon
x5650 CPUs are 6 cores and 12 threads, so you maybe using 2
process in one core and that is slowing it down.</span></div>
<div class="gmail_extra"><br>
<div class="gmail_quote">2016-08-31 18:36 GMT-03:00 Wang,
Yaoping <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:wang.3866@buckeyemail.osu.edu"
target="_blank">wang.3866@buckeyemail.osu.edu</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div
style="font-size:10pt;color:#000000;background-color:#ffffff;font-family:Mangal,Sans-Serif">
<p>Hi All, </p>
<p><br>
</p>
<p>I am running WRF on a ~6km resolution, <span
style="font-size:10pt">91 x 121 domain in the
eastern United States. I am using an adaptive time
step which makes it mostly 72 sec increments. </span><span
style="font-size:10pt">There are 34 vertical
levels. I use 4 x 12 cores on a Intel Xeon x5650
CPUs machine. </span><span style="font-size:10pt">The
throughput is about 1.2 hour wall time per 24 hours
model time. </span></p>
<p><span style="font-size:10pt"></span></p>
<p><span style="font-size:10pt"><br>
</span></p>
<p><span style="font-size:10pt">Is this a reasonable
speed? I found some information here (<a
moz-do-not-send="true"
href="http://www.ecmwf.int/sites/default/files/elibrary/2014/13662-performance-analysis-operational-implementaion-wrf.pdf"
target="_blank">http://www.ecmwf.int/sites/<wbr>default/files/elibrary/2014/<wbr>13662-performance-analysis-<wbr>operational-implementaion-wrf.<wbr>pdf</a>)
and after considering the domain difference, my run
still seems a touch slow. And i</span><span
style="font-size:10pt">s there anyway I could figure
how to make the model run faster?</span></p>
<p><span style="font-size:10pt"><br>
</span></p>
<p><span style="font-size:10pt">Thank you, </span></p>
<span class="HOEnZb"><font color="#888888">
<p><span style="font-size:10pt">Yaoping Wang</span></p>
</font></span></div>
</div>
<br>
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</blockquote>
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</blockquote>
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