<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Dear Nuria,<div><br></div><div>Have a look at this paper:</div><div><br></div><div><div>Geosci. Model Dev., 4, 611–623, 2011</div><div><a href="http://www.geosci-model-dev.net/4/611/2011/">www.geosci-model-dev.net/4/611/2011/</a></div><div>doi:10.5194/gmd-4-611-2011</div><div>Influence of the compiler on multi-CPU performance of WRFv3</div><div>T. Langkamp and J. Boehner</div></div><div><br></div><div>Cheers Dom</div><div><br></div><div><div><div>On 25/10/2013, at 9:40 am, Núria Castell <<a href="mailto:Nuria.Castell@nilu.no">Nuria.Castell@nilu.no</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div lang="NO-BOK" link="blue" vlink="purple" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div class="WordSection1"><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;">Dear all,</div><p class="MsoNormal" style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"> </p><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span lang="EN-US">I would like to run WRF for forecasting purposes, and for that I need to speed up the model as much as possible. I am using GNU Fortran compiler (gfortran and gcc) with the options by default (see the configure.wrf attached), and when compiling I am using the option:<span class="Apple-converted-space"> </span><span style="background-color: white; background-position: initial initial; background-repeat: initial initial;">Linux i486 i586 i686, gfortran compiler with gcc (smpar) as I need to use the shared option memory (OpenMP).</span></span></div><p class="MsoNormal" style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span lang="EN-US"> </span></p><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span lang="EN-US">Does anyone has experience with speeding up the running time using other compiler options? Do you know if using PGI compiler instead of GNU will be more efficient regarding computing time?</span></div><p class="MsoNormal" style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span lang="EN-US"> </span></p><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span lang="EN-US">Thanks in advance!</span></div><p class="MsoNormal" style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span lang="EN-US"> </span></p><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span lang="EN-US">All the best,</span></div><p class="MsoNormal" style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span lang="EN-US"> </span></p><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span lang="EN-US">Nuria</span></div><p class="MsoNormal" style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span lang="EN-US"> </span></p><table class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0" width="481" style="width: 360.85pt; border-collapse: collapse;"><tbody><tr style="height: 9.5pt;"><td width="481" nowrap="" colspan="4" valign="bottom" style="width: 360.85pt; padding: 0cm 3.5pt; height: 9.5pt;"><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><b><span style="font-size: 10pt;">Dr. Nuria Castell</span></b><span style="font-size: 12pt;"></span></div></td></tr><tr style="height: 9.5pt;"><td width="481" nowrap="" colspan="4" valign="bottom" style="width: 360.85pt; padding: 0cm 3.5pt; height: 9.5pt;"><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; line-height: 9.5pt;"><span style="font-size: 9pt;">Forsker</span><span style="font-size: 12pt;"></span></div></td></tr><tr style="height: 9.5pt;"><td width="481" nowrap="" colspan="4" valign="bottom" style="width: 360.85pt; padding: 0cm 3.5pt; height: 9.5pt;"><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span lang="EN-US" style="font-size: 9pt;">Senior Scientist</span><span lang="EN-US" style="font-size: 12pt; font-family: 'Times New Roman', serif;"></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; line-height: 9.5pt;"><span lang="EN-US" style="font-size: 9pt;">By og industri / Urban Environment and Industry</span><span lang="EN-US" style="font-size: 12pt;"></span></div></td></tr><tr style="height: 15.85pt;"><td width="481" nowrap="" colspan="4" valign="bottom" style="width: 360.85pt; padding: 0cm 3.5pt; height: 15.85pt;"><div class="MsoNormal" style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span style="font-size: 9pt;"><hr size="1" width="100%" noshade="" align="left" style="color: rgb(172, 168, 153);"></span></div></td></tr><tr style="height: 9.5pt;"><td width="72" nowrap="" rowspan="5" valign="top" style="width: 54.05pt; padding: 0cm 3.5pt; height: 9.5pt;"><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; line-height: 9.5pt;"><span style="font-size: 9pt; color: rgb(127, 127, 127);"><image001.jpg></span><span style="font-size: 12pt; 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