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I managed to track down where the error is coming from and it does seem to be either cluster or compiler dependent. It’s not something in the Cactus Code in general.
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<div class="">-DG<br class="">
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-- <br class="">
David Garrison, Ph.D. <br class="">
Associate Dean for the College of Science and Engineering, <br class="">
Professor and Founding Chair of Physics<br class="">
University of Houston-Clear Lake <br class="">
Bayou 3611/STEM 2252<br class="">
Houston, TX 77058 <br class="">
<br class="">
BAYOU: 281-283-3717<br class="">
STEM : 281-283-3796 <br class="">
<a href="https://www.uhcl.edu/science-engineering/faculty/garrison-david" class="">https://www.uhcl.edu/science-engineering/faculty/garrison-david</a> <br class="">
<a href="http://www.uhcl.edu/physics" class="">http://www.uhcl.edu/physics</a><br class="">
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"If we knew what it was we were doing, it would not be called research, would it?" — Albert Einstein. <br class="">
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<div class="">On Apr 29, 2022, at 3:37 AM, Bruno Giacomazzo <<a href="mailto:bruno.giacomazzo@unimib.it" class="">bruno.giacomazzo@unimib.it</a>> wrote:</div>
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<div dir="ltr" class="">DG,
<div class=""> it could also be that there is a bug in the code, but other compilers are not affected by it. </div>
<div class="">My strategy is usually to make sure that I can reproduce the problem on the cluster when running just with one core. In this way it is easier to run within a debugger and spot the problem.</div>
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<div class="">Best regards,</div>
<div class="">Bruno</div>
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<div dir="ltr" class="gmail_attr">Il giorno ven 29 apr 2022 alle ore 08:12 Garrison, David <<a href="mailto:Garrison@uhcl.edu" class="">Garrison@uhcl.edu</a>> ha scritto:<br class="">
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<div style="overflow-wrap: break-word;" class="">It seems to be an error on a cluster I use but not on my Mac. It may be an issue with how the cluster is configured.
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<div class="">-DG<br class="">
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<blockquote type="cite" class="">
<div class="">On Apr 28, 2022, at 9:48 AM, Bruno Giacomazzo <<a href="mailto:bruno.giacomazzo@unimib.it" target="_blank" class="">bruno.giacomazzo@unimib.it</a>> wrote:</div>
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DG,<br class="">
<div class=""> thanks for the parameter file.</div>
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<div class="">During today's call we also saw that you mentioned that you encountered a segmentation fault when using one ghost point. Do you have a backtrace? Did you try running the code in a debugger to check which variable is causing it?</div>
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<div class="">Cheers,</div>
<div class="">Bruno</div>
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<div dir="ltr" class="gmail_attr">Il giorno gio 21 apr 2022 alle ore 17:32 Garrison, David <<a href="mailto:Garrison@uhcl.edu" target="_blank" class="">Garrison@uhcl.edu</a>> ha scritto:<br class="">
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<div class="">I don’t use standard Einstein Toolkit thorns. I also don’t use refinement levels in Carpet. Please see attached for an example. The error occurs when I change the ghost zone size to 1.
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<div class="">-DG</div>
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<div style="text-align:start;text-indent:0px" class="">-- <br class="">
David Garrison, Ph.D. <br class="">
Associate Dean for the College of Science and Engineering, <br class="">
Professor and Founding Chair of Physics<br class="">
University of Houston-Clear Lake <br class="">
Bayou 3611/STEM 2252<br class="">
Houston, TX 77058 <br class="">
<br class="">
BAYOU: 281-283-3717<br class="">
STEM : 281-283-3796 <br class="">
<a href="https://www.uhcl.edu/science-engineering/faculty/garrison-david" target="_blank" class="">https://www.uhcl.edu/science-engineering/faculty/garrison-david</a> <br class="">
<a href="http://www.uhcl.edu/physics" target="_blank" class="">http://www.uhcl.edu/physics</a><br class="">
<br class="">
"If we knew what it was we were doing, it would not be called research, would it?" — Albert Einstein. <br class="">
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<div class="">On Apr 21, 2022, at 9:24 AM, Bruno Giacomazzo <<a href="mailto:bruno.giacomazzo@unimib.it" target="_blank" class="">bruno.giacomazzo@unimib.it</a>> wrote:</div>
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<div dir="ltr" class="">DG,<br class="">
<div class=""> if you could share the parameter file that would be useful in order to try reproducing the error with standard Einstein Toolkit thorns. I do not see any problem with the lines of code you posted in the email.</div>
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<div class="">Do you get the same problem also when using Carpet without refinement levels?</div>
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<div class="">Best regards,</div>
<div class="">Bruno</div>
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<div dir="ltr" class="">Il giorno gio 31 mar 2022 alle ore 19:17 Garrison, David <<a href="mailto:Garrison@uhcl.edu" target="_blank" class="">Garrison@uhcl.edu</a>> ha scritto:<br class="">
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<div class="">Hello,
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<div class="">It is a custom code so I am attaching the part I used to do the reductions instead.</div>
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<div class="">handle = CCTK_ReductionHandle("average");</div>
<div class="">ierr = CCTK_Reduce(cctkGH, -1, handle, 1, CCTK_VARIABLE_REAL, &scale_factor, 1, CCTK_VarIndex("MHD_Analysis::aa_out_avg"));</div>
<div class="">ierr = CCTK_Reduce(cctkGH, -1, handle, 1, CCTK_VARIABLE_REAL, &utime, 1, CCTK_VarIndex("MHD_Analysis::univ_age"));</div>
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<div class="">-DG</div>
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<div class="">On Mar 31, 2022, at 9:21 AM, Bruno Giacomazzo <<a href="mailto:bruno.giacomazzo@unimib.it" target="_blank" class="">bruno.giacomazzo@unimib.it</a>> wrote:</div>
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<div dir="ltr" class="">DG,
<div class=""> could you share the parameter file you are using? So that we may have a better look at the problem.</div>
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<div class="">Thanks,</div>
<div class="">Bruno</div>
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<div dir="ltr" class="">Il giorno mer 30 mar 2022 alle ore 20:52 Garrison, David <<a href="mailto:Garrison@uhcl.edu" target="_blank" class="">Garrison@uhcl.edu</a>> ha scritto:<br class="">
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<div class="">Hello,
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</div>
<div class="">Whenever I set the number of ghost zones to 1, I get segmentation faults from my reduction operations. This wasn’t an issue with Pugh or when I use 2 or more ghost zones with Carpet. Has anyone else had this problem?</div>
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<div class="">-DG</div>
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<div style="text-align:start;text-indent:0px" class="">
<div style="text-align:start;text-indent:0px" class="">-- <br class="">
David Garrison, Ph.D. <br class="">
Interim Associate Dean for the College of Science and Engineering, <br class="">
Professor and Founding Chair of Physics<br class="">
University of Houston-Clear Lake <br class="">
Bayou 3611/STEM 2252<br class="">
Houston, TX 77058 <br class="">
<br class="">
BAYOU: 281-283-3717<br class="">
STEM : 281-283-3796 <br class="">
<a href="https://www.uhcl.edu/science-engineering/faculty/garrison-david" target="_blank" class="">https://www.uhcl.edu/science-engineering/faculty/garrison-david</a> <br class="">
<a href="http://www.uhcl.edu/physics" target="_blank" class="">http://www.uhcl.edu/physics</a><br class="">
<br class="">
"If we knew what it was we were doing, it would not be called research, would it?" — Albert Einstein. <br class="">
<br class="">
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<p class=""><font class="">Pr<font face="arial, sans-serif" class="">of. Bruno Giacomazzo<br class="">
Department of Physics<br class="">
University of Milano-Bicocca<br class="">
</font></font><span class=""><font face="arial, sans-serif" class="">Piazza della Scienza 3<br class="">
</font></span><span class=""><font face="arial, sans-serif" class="">20126 Milano<br class="">
</font></span><span style="font-size:12.8px" class="">Italy</span></p>
<p class=""><font class=""><span style="font-size:12.8px" class="">email: </span><span style="font-size:12.8px" class=""><a href="mailto:bruno.giacomazzo@unimib.it" target="_blank" class="">bruno.giacomazzo@unimib.it</a><br class="">
</span><span style="font-size:12.8px" class="">phone: (+39) 02 6448 2321</span></font><br class="">
<font class=""><span style="font-size:12.8px" class="">web: </span></font><span style="font-size:12.8px" class=""><a href="https://urldefense.com/v3/__http://www.brunogiacomazzo.org/__;!!BCR0FSePrR4x!GUGB7CSrDExPdA7mPVZuCzM9_713wMhA6f8kQaO9C64EN4b4r13kCh02xdXjodRmQMcnuEwDpO-G513ivCR5jfvd-LgExw$" style="font-size:12.8px" target="_blank" class="">http://www.brunogiacomazzo.org</a></span></p>
<p class=""><font class="">----------------------------------------------------------------------<br class="">
<span style="font-size:12.8px" class="">There are only 10 types of people in the world:<br class="">
</span><span style="font-size:12.8px" class="">Those who understand binary, and those who don't<br class="">
</span><span style="font-size:12.8px" class="">----------------------------------------------------------------------<br class="">
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-- <br class="">
David Garrison, Ph.D.<br class="">
Interim Associate Dean for the College of Science and Engineering, Professor and Former Chair of Physics<br class="">
University of Houston-Clear Lake<br class="">
Bayou 3611<br class="">
Houston, TX 77058 <br class="">
<br class="">
Tel: 281-283-3796 <br class="">
Fax: 281-283-3709 <br class="">
<a href="http://sce.uhcl.edu/garrison" target="_blank" class="">http://sce.uhcl.edu/garrison</a><br class="">
<a href="http://www.uhcl.edu/physics" target="_blank" class="">http://www.uhcl.edu/physics</a><br class="">
<br class="">
"If we knew what it was we were doing, it would not be called research,<br class="">
would it?" ‹ Albert Einstein.<br class="">
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<p class=""><font class="">Pr<font face="arial, sans-serif" class="">of. Bruno Giacomazzo<br class="">
Department of Physics<br class="">
University of Milano-Bicocca<br class="">
</font></font><span class=""><font face="arial, sans-serif" class="">Piazza della Scienza 3<br class="">
</font></span><span class=""><font face="arial, sans-serif" class="">20126 Milano<br class="">
</font></span><span style="font-size:12.8px" class="">Italy</span></p>
<p class=""><font class=""><span style="font-size:12.8px" class="">email: </span><span style="font-size:12.8px" class=""><a href="mailto:bruno.giacomazzo@unimib.it" target="_blank" class="">bruno.giacomazzo@unimib.it</a><br class="">
</span><span style="font-size:12.8px" class="">phone: (+39) 02 6448 2321</span></font><br class="">
<font class=""><span style="font-size:12.8px" class="">web: </span></font><span style="font-size:12.8px" class=""><a href="https://urldefense.com/v3/__http://www.brunogiacomazzo.org/__;!!BCR0FSePrR4x!DqdugUWohGBKF9_Wl__sHgXYw1vCqt6Rw0l_AuKu5GS6Xh14wzBgWopnoJL3cax3rxn42oIsJW6QCOoYgGoKOrxkYCB7dw$" style="font-size:12.8px" target="_blank" class="">http://www.brunogiacomazzo.org</a></span></p>
<p class=""><font class="">----------------------------------------------------------------------<br class="">
<span style="font-size:12.8px" class="">There are only 10 types of people in the world:<br class="">
</span><span style="font-size:12.8px" class="">Those who understand binary, and those who don't<br class="">
</span><span style="font-size:12.8px" class="">----------------------------------------------------------------------<br class="">
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<p class=""><font class="">Pr<font face="arial, sans-serif" class="">of. Bruno Giacomazzo<br class="">
Department of Physics<br class="">
University of Milano-Bicocca<br class="">
</font></font><span class=""><font face="arial, sans-serif" class="">Piazza della Scienza 3<br class="">
</font></span><span class=""><font face="arial, sans-serif" class="">20126 Milano<br class="">
</font></span><span style="font-size:12.8px" class="">Italy</span></p>
<p class=""><font class=""><span style="font-size:12.8px" class="">email: </span><span style="font-size:12.8px" class=""><a href="mailto:bruno.giacomazzo@unimib.it" target="_blank" class="">bruno.giacomazzo@unimib.it</a><br class="">
</span><span style="font-size:12.8px" class="">phone: (+39) 02 6448 2321</span></font><br class="">
<font class=""><span style="font-size:12.8px" class="">web: </span></font><span style="font-size:12.8px" class=""><a href="https://urldefense.com/v3/__http://www.brunogiacomazzo.org/__;!!BCR0FSePrR4x!De0kFnjWOdFfWZLrtJ1dyPjh8U0NRsUHBxUJCDlFCu258B4dtytsKJzPrQGeWiO6NI92DOTRQcQWsHCGTm7bD8H2p8VpCw$" style="font-size:12.8px" target="_blank" class="">http://www.brunogiacomazzo.org</a></span></p>
<p class=""><font class="">----------------------------------------------------------------------<br class="">
<span style="font-size:12.8px" class="">There are only 10 types of people in the world:<br class="">
</span><span style="font-size:12.8px" class="">Those who understand binary, and those who don't<br class="">
</span><span style="font-size:12.8px" class="">----------------------------------------------------------------------</span></font></p>
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<p class=""><font class="">Pr<font face="arial, sans-serif" class="">of. Bruno Giacomazzo<br class="">
Department of Physics<br class="">
University of Milano-Bicocca<br class="">
</font></font><span style="" class=""><font face="arial, sans-serif" class="">Piazza della Scienza 3<br class="">
</font></span><span style="" class=""><font face="arial, sans-serif" class="">20126 Milano<br class="">
</font></span><span style="font-size: 12.8px;" class="">Italy</span></p>
<p class=""><font class=""><span style="font-size:12.8px" class="">email: </span><span style="font-size:12.8px" class=""><a href="mailto:bruno.giacomazzo@unimib.it" target="_blank" class="">bruno.giacomazzo@unimib.it</a><br class="">
</span><span style="font-size:12.8px" class="">phone: (+39) 02 6448 2321</span></font><br class="">
<font class=""><span style="font-size:12.8px" class="">web: </span></font><span style="font-size: 12.8px;" class=""><a href="https://urldefense.com/v3/__http://www.brunogiacomazzo.org/__;!!BCR0FSePrR4x!G8QCN-PYIs8St4OyCehFnkWB7djOBoqOoBU9IWkO43zQWrLwzYsqG4QDzRQV-s2fLlvqSh-u75EnfsjTxQv1Qd-w6r_YiQ$" style="font-size:12.8px" target="_blank" class="">http://www.brunogiacomazzo.org</a></span></p>
<p class=""><font class="">----------------------------------------------------------------------<br class="">
<span style="font-size:12.8px" class="">There are only 10 types of people in the world:<br class="">
</span><span style="font-size:12.8px" class="">Those who understand binary, and those who don't<br class="">
</span><span style="font-size:12.8px" class="">----------------------------------------------------------------------<br class="">
</span></font></p>
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