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@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@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@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@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@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@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. 

_______________________________________________
Users mailing list
Users@einsteintoolkit.org
http://lists.einsteintoolkit.org/mailman/listinfo/users

-- 

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

email: bruno.giacomazzo@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
----------------------------------------------------------------------

-- 
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@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
----------------------------------------------------------------------

-- 

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

email: bruno.giacomazzo@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
----------------------------------------------------------------------