Hi,
When I run my CFD code with a grid size of 1119x1119x499 ( total grid
size = 624828339 ), I got the error saying I need to compile PETSc
with 64-bit indices.
So I tried to compile PETSc again and then compile my CFD code with the
newly compiled PETSc. However, now I got segmentation error:
rm: cannot remove `log': No such file or directory
[409]PETSC ERROR:
------------------------------------------------------------------------
[409]PETSC ERROR: [535]PETSC ERROR: [410]PETSC ERROR:
------------------------------------------------------------------------
[410]PETSC ERROR: Caught signal number 11 SEGV: Segmentation Violation,
probably memory access out of range
[410]PETSC ERROR: Try option -start_in_debugger or -on_error_attach_debugger
[410]PETSC ERROR: [536]PETSC ERROR:
------------------------------------------------------------------------
[536]PETSC ERROR: Caught signal number 11 SEGV: Segmentation Violation,
probably memory access out of range
[536]PETSC ERROR: Try option -start_in_debugger or -on_error_attach_debugger
[536]PETSC ERROR: or see
http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind
[536]PETSC ERROR: or try http://valgrind.org on GNU/linux and Apple Mac
OS X to find memory corruption errors
[536]PETSC ERROR: likely location of problem given in stack below
[536]PETSC ERROR: --------------------- Stack Frames
------------------------------------
[536]PETSC ERROR: Note: The EXACT line numbers in the stack are not
available,
[536]PETSC ERROR: INSTEAD the line number of the start of the function
[536]PETSC ERROR: is given.
[536]PETSC ERROR: [536] DMDACheckOwnershipRanges_Private line 581
/home/users/nus/tsltaywb/source/petsc-3.7.6/src/dm/impls/da/da.c
[536]PETSC ERROR: or see
http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind
[410]PETSC ERROR: or try http://valgrind.org on GNU/linux and Apple Mac
OS X to find memory corruption errors
[410]PETSC ERROR: likely location of problem given in stack below
[410]PETSC ERROR: --------------------- Stack Frames
------------------------------------
[410]PETSC ERROR: Note: The EXACT line numbers in the stack are not
available,
[897]PETSC ERROR: [536] DMDASetOwnershipRanges line 613
/home/users/nus/tsltaywb/source/petsc-3.7.6/src/dm/impls/da/da.c
[536]PETSC ERROR: [536] DMDACreate3d line 1434
/home/users/nus/tsltaywb/source/petsc-3.7.6/src/dm/impls/da/da3.c
[536]PETSC ERROR: --------------------- Error Message
--------------------------------------------------------------
The CFD code worked previously but increasing the problem size results
in segmentation error. It seems to be related to DMDACreate3d and
DMDASetOwnershipRanges. Any idea where the problem lies?
Besides, I want to know when and why do I have to use PETSc with 64-bit
indices?
Also, can I use the 64-bit indices version with smaller sized problems?
And is there a speed difference between using the 32-bit and 64-bit
indices ver?
--
Thank you very much.
Yours sincerely,
================================================
TAY Wee-Beng (Zheng Weiming) 郑伟明
Personal research webpage: http://tayweebeng.wixsite.com/website
Youtube research showcase:
https://www.youtube.com/channel/UC72ZHtvQNMpNs2uRTSToiLA
linkedin: www.linkedin.com/in/tay-weebeng
================================================
