[Users] Segmentation Fault with CarpetReduce

Tue May 3 04:58:03 CDT 2022

DG,
  OK, thanks for informing us.

Best regards,
Bruno

Il giorno ven 29 apr 2022 alle ore 22:10 Garrison, David <Garrison at uhcl.edu>
ha scritto:

> 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.
>
> -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 29, 2022, at 3:37 AM, Bruno Giacomazzo <bruno.giacomazzo at unimib.it>
> wrote:
>
> 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
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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
> <https://urldefense.com/v3/__http://www.brunogiacomazzo.org/__;!!BCR0FSePrR4x!G8QCN-PYIs8St4OyCehFnkWB7djOBoqOoBU9IWkO43zQWrLwzYsqG4QDzRQV-s2fLlvqSh-u75EnfsjTxQv1Qd-w6r_YiQ$>
>
> ----------------------------------------------------------------------
> 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

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