[Users] Segmentation Fault with CarpetReduce

Fri Apr 29 03:37:21 CDT 2022

DG,
  it could also be that there is a bug in the code, but other compilers are
not affected by it.
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.

Best regards,
Bruno

Il giorno ven 29 apr 2022 alle ore 08:12 Garrison, David <Garrison at uhcl.edu>
ha scritto:

> 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.
>
> -DG
>
> On Apr 28, 2022, at 9:48 AM, Bruno Giacomazzo <bruno.giacomazzo at unimib.it>
> wrote:
>
> DG,
>    thanks for the parameter file.
>
> 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?
>
> Cheers,
> Bruno
>
> Il giorno gio 21 apr 2022 alle ore 17:32 Garrison, David <
> Garrison at uhcl.edu> ha scritto:
>
>> 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.
>>
>> -DG
>>
>> --
>> David Garrison, Ph.D.
>> Associate Dean for the College of Science and Engineering,
>> Professor and Founding Chair of Physics
>> University of Houston-Clear Lake
>> Bayou 3611/STEM 2252
>> Houston, TX 77058
>>
>> BAYOU: 281-283-3717
>> STEM : 281-283-3796
>> https://www.uhcl.edu/science-engineering/faculty/garrison-david
>> http://www.uhcl.edu/physics
>>
>> "If we knew what it was we were doing, it would not be called research,
>> would it?" — Albert Einstein.
>>
>>
>>
>> On Apr 21, 2022, at 9:24 AM, Bruno Giacomazzo <bruno.giacomazzo at unimib.it>
>> wrote:
>>
>> DG,
>>   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.
>>
>> Do you get the same problem also when using Carpet without refinement
>> levels?
>>
>> Best regards,
>> Bruno
>>
>> Il giorno gio 31 mar 2022 alle ore 19:17 Garrison, David <
>> Garrison at uhcl.edu> ha scritto:
>>
>> Hello,
>>
>> It is a custom code so I am attaching the part I used to do the
>> reductions instead.
>>
>> handle = CCTK_ReductionHandle("average");
>> ierr = CCTK_Reduce(cctkGH, -1, handle, 1, CCTK_VARIABLE_REAL,
>> &scale_factor, 1, CCTK_VarIndex("MHD_Analysis::aa_out_avg"));
>> ierr = CCTK_Reduce(cctkGH, -1, handle, 1, CCTK_VARIABLE_REAL, &utime, 1,
>> CCTK_VarIndex("MHD_Analysis::univ_age"));
>>
>>
>> -DG
>>
>>
>> On Mar 31, 2022, at 9:21 AM, Bruno Giacomazzo <bruno.giacomazzo at unimib.it>
>> wrote:
>>
>> DG,
>>     could you share the parameter file you are using? So that we may have
>> a better look at the problem.
>>
>> Thanks,
>> Bruno
>>
>>
>> Il giorno mer 30 mar 2022 alle ore 20:52 Garrison, David <
>> Garrison at uhcl.edu> ha scritto:
>>
>> Hello,
>>
>> 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?
>>
>> -DG
>>
>> --
>> David Garrison, Ph.D.
>> Interim Associate Dean for the College of Science and Engineering,
>> Professor and Founding Chair of Physics
>> University of Houston-Clear Lake
>> Bayou 3611/STEM 2252
>> Houston, TX 77058
>>
>> BAYOU: 281-283-3717
>> STEM : 281-283-3796
>> https://www.uhcl.edu/science-engineering/faculty/garrison-david
>> http://www.uhcl.edu/physics
>>
>> "If we knew what it was we were doing, it would not be called research,
>> would it?" — Albert Einstein.
>>
>>
>>
>>
>> _______________________________________________
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>>
>>
>>
>> --
>>
>> Prof. Bruno Giacomazzo
>> Department of Physics
>> University of Milano-Bicocca
>> Piazza della Scienza 3
>> 20126 Milano
>> Italy
>>
>> email: bruno.giacomazzo at unimib.it
>> phone: (+39) 02 6448 2321
>> web: http://www.brunogiacomazzo.org
>> <https://urldefense.com/v3/__http://www.brunogiacomazzo.org/__;!!BCR0FSePrR4x!GUGB7CSrDExPdA7mPVZuCzM9_713wMhA6f8kQaO9C64EN4b4r13kCh02xdXjodRmQMcnuEwDpO-G513ivCR5jfvd-LgExw$>
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>> ----------------------------------------------------------------------
>> There are only 10 types of people in the world:
>> Those who understand binary, and those who don't
>> ----------------------------------------------------------------------
>>
>>
>> --
>> David Garrison, Ph.D.
>> Interim Associate Dean for the College of Science and Engineering,
>> Professor and Former Chair of Physics
>> University of Houston-Clear Lake
>> Bayou 3611
>> Houston, TX 77058
>>
>> Tel: 281-283-3796
>> Fax: 281-283-3709
>> http://sce.uhcl.edu/garrison
>> http://www.uhcl.edu/physics
>>
>> "If we knew what it was we were doing, it would not be called research,
>> would it?" ‹ Albert Einstein.
>>
>>
>>
>>
>>
>>
>> --
>>
>> Prof. Bruno Giacomazzo
>> Department of Physics
>> University of Milano-Bicocca
>> Piazza della Scienza 3
>> 20126 Milano
>> Italy
>>
>> email: bruno.giacomazzo at unimib.it
>> phone: (+39) 02 6448 2321
>> web: http://www.brunogiacomazzo.org
>> <https://urldefense.com/v3/__http://www.brunogiacomazzo.org/__;!!BCR0FSePrR4x!DqdugUWohGBKF9_Wl__sHgXYw1vCqt6Rw0l_AuKu5GS6Xh14wzBgWopnoJL3cax3rxn42oIsJW6QCOoYgGoKOrxkYCB7dw$>
>>
>> ----------------------------------------------------------------------
>> There are only 10 types of people in the world:
>> Those who understand binary, and those who don't
>> ----------------------------------------------------------------------
>>
>>
>>
>
> --
>
> Prof. Bruno Giacomazzo
> Department of Physics
> University of Milano-Bicocca
> Piazza della Scienza 3
> 20126 Milano
> Italy
>
> email: bruno.giacomazzo at unimib.it
> phone: (+39) 02 6448 2321
> web: http://www.brunogiacomazzo.org
> <https://urldefense.com/v3/__http://www.brunogiacomazzo.org/__;!!BCR0FSePrR4x!De0kFnjWOdFfWZLrtJ1dyPjh8U0NRsUHBxUJCDlFCu258B4dtytsKJzPrQGeWiO6NI92DOTRQcQWsHCGTm7bD8H2p8VpCw$>
>
> ----------------------------------------------------------------------
> There are only 10 types of people in the world:
> Those who understand binary, and those who don't
> ----------------------------------------------------------------------
>
>
>

-- 

Prof. Bruno Giacomazzo
Department of Physics
University of Milano-Bicocca
Piazza della Scienza 3
20126 Milano
Italy

email: bruno.giacomazzo at unimib.it
phone: (+39) 02 6448 2321
web: http://www.brunogiacomazzo.org

----------------------------------------------------------------------
There are only 10 types of people in the world:
Those who understand binary, and those who don't
----------------------------------------------------------------------
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