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<p class="MsoNormal"><span style="font-size:12.0pt;color:#1F497D">Thanks to those who responded. One of the suggestions was to increase the value of the debugging parameter in the namelist and that was a big help.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:#1F497D">After recompiling with debugging and traceback, the true cause of the segfault revealed itself. If sf_urban_physics is non zero AND a Noah land surface scheme is chosen, WRF will crash; not
only with Intel 17.0.4 but also 14.0.1 (and the latest 18 beta). Looks to be a problem with uninitialized variables when module_sf_noahdrv calls the particular sf_urban scheme.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:#1F497D">When WRF is run using the PGI compiler (2017), crashes are much less likely, but still occur on occasion.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:#1F497D">The documentation for WRF says that the urban physics schemes will work if a Noah LSM is chosen … perhaps this is a problem that was thought to be fixed but appears not to be.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:#1F497D">--Kevin<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black">_____________________________________________<br>
Kevin Tyle, Manager of Departmental Computing<br>
Dept. of Atmospheric & Environmental Sciences <br>
University at Albany<br>
Earth Science 235, 1400 Washington Avenue <br>
Albany, NY 12222<br>
Email: <a href="mailto:ktyle@albany.edu"><span style="color:blue">ktyle@albany.edu</span></a><br>
Phone: 518-442-4578 <br>
_____________________________________________<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b>From:</b> Tyle, Kevin R <br>
<b>Sent:</b> Monday, July 17, 2017 4:05 PM<br>
<b>To:</b> 'wrf-users@ucar.edu' <wrf-users@ucar.edu><br>
<b>Subject:</b> Segfaults with Intel 2017 Compiler<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">I’ve experienced segfaults in various WRF versions (3.7.1 and 3.9) that appear tied to executables built using the current (17.0.4) version of the Intel compilers.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">With debugging set at a value of 100 in namelist.input, I consistently see “CALL rrtmg_lw” as the last thing written to the rsl.error.0000 file prior to the segfault.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Longwave schemes 4 (3.7.1 and 3.9) and 24 (3.9) have been tried with similar behavior.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">This is using openmpi (have tried the latest 1.10 and 2.1 releases). Stacksize is unlimited.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Intel compiler version 14.0.1 does not show this problem, nor does the latest PGI 2017 community release.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Any ideas or suggestions would be appreciated!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">--Kevin<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black">_____________________________________________<br>
Kevin Tyle, Manager of Departmental Computing<br>
Dept. of Atmospheric & Environmental Sciences <br>
University at Albany<br>
Earth Science 235, 1400 Washington Avenue <br>
Albany, NY 12222<br>
Email: <a href="mailto:ktyle@albany.edu"><span style="color:blue">ktyle@albany.edu</span></a><br>
Phone: 518-442-4578 <br>
_____________________________________________<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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