[petsc-users] PETSc/petsc4py error detection

[Barry Smith]

  You can run PETSc with the option -no_signal_handler  and it will not catch these errors.

   Barry


On Aug 26, 2014, at 1:33 AM, Nicola Creati <ncreati at inogs.it> wrote:

> Hello,
> I'm writing a large application in Python that uses petsc4py to solve some equations. Running my code I note that PETSc detects errors in sections (I believe in Cython extensions and packages) where petsc4py is not imported or used. I do not need to fix the problem, I already did it. Is there a way to avoid petsc4py/PETSc to catch errors in not PETSc sections of the code?
> This is an example of the error message I got:
> 
> [0]PETSC ERROR: ------------------------------------------------------------------------
> [0]PETSC ERROR: Caught signal number 11 SEGV: Segmentation Violation, probably memory access out of range
> [0]PETSC ERROR: Try option -start_in_debugger or -on_error_attach_debugger
> [0]PETSC ERROR: or see http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind[0]PETSC ERROR: or try http://valgrind.org on GNU/linux and Apple Mac OS X to find memory corruption errors
> [0]PETSC ERROR: likely location of problem given in stack below
> [0]PETSC ERROR: ---------------------  Stack Frames ------------------------------------
> [0]PETSC ERROR: Note: The EXACT line numbers in the stack are not available,
> [0]PETSC ERROR:       INSTEAD the line number of the start of the function
> [0]PETSC ERROR:       is given.
> --------------------------------------------------------------------------
> mpiexec noticed that process rank 0 with PID 25694 on node daisy exited on signal 11 (Segmentation fault).
> --------------------------------------------------------------------------
> 
> I'm using Python 2.7.6, petsc4py 3.4 and PETSc 3.4.3.
> 
> Thanks.
> 
> Nicola
> 
> -- 
> _____________________________________________________________________
> Nicola Creati
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