[petsc-dev] segfault in SNESDestroy()

Thu May 18 16:58:00 CDT 2017

Adrian,
Ignore my previous email.
I can reproduce it using
petsc/src/snes/examples/tutorials
mpiexec -n 2 ./ex19 -pc_type asm -dm_mat_type baij

I'll let you the fix.

Hong

On Thu, May 18, 2017 at 4:33 PM, Hong <hzhang at mcs.anl.gov> wrote:

> Adrian,
> Adding option '-mat_type aij', do you still see this problem?
>
> Is possible to send us a simple code that produces this error?
> I cannot reproduce it using petsc examples.
>
> Hong
>
>
> On Wed, May 17, 2017 at 10:50 PM, Barry Smith <bsmith at mcs.anl.gov> wrote:
>
>>
>>    Adrian,
>>
>>     There is a good chance this is a bug that got introduced while
>> optimizing the scalability of the ASM preconditioner.
>>
>>    Hong,
>>
>>      Can you try to reproduce the crash by using the options below on one
>> of the PETSc test examples.
>>
>>    Thanks
>>
>>     Barry
>>
>> > On May 17, 2017, at 10:47 PM, Adrian Croucher <
>> a.croucher at auckland.ac.nz> wrote:
>> >
>> > hi,
>> >
>> > I just pulled the latest 'next' branch and am getting a segfault in
>> SNESDestroy(), which didn't used to happen.
>> >
>> > It looks like it is having trouble destroying submatrices in the
>> Jacobian sub-preconditioner. The KSP in the SNES is using BCGS with ASM
>> preconditioner.
>> >
>> > The error goes away if I run in serial, or if I set the ILU fill-in
>> greater than zero using e.g. -sub_pc_factor_levels 1.
>> >
>> > The error message is below. Any clues?
>> >
>> > - Adrian
>> >
>> > --
>> > [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/d
>> ocumentation/faq.html#valgrind
>> > [0]PETSC ERROR: [1]PETSC ERROR: ------------------------------
>> ------------------------------------------
>> > [1]PETSC ERROR: Caught signal number 11 SEGV: Segmentation Violation,
>> probably memory access out of range
>> > [1]PETSC ERROR: Try option -start_in_debugger or
>> -on_error_attach_debugger
>> > [1]PETSC ERROR: or see http://www.mcs.anl.gov/petsc/d
>> ocumentation/faq.html#valgrind
>> > or try http://valgrind.org on GNU/linux and Apple Mac OS X to find
>> memory corruption errors
>> > [1]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: [1]PETSC ERROR: likely location of problem given in
>> stack below
>> > [1]PETSC ERROR: ---------------------  Stack Frames
>> ------------------------------------
>> > [1]PETSC ERROR:       is given.
>> > [0]PETSC ERROR: [0] MatDestroy_SeqBAIJ_Submatrices line 220
>> /home/acro018/software/PETSc/code/src/mat/impls/baij/seq/baij2.c
>> > [0]PETSC ERROR: [0] MatDestroy line 1160 /home/acro018/software/PETSc/c
>> ode/src/mat/interface/matrix.c
>> > [0]PETSC ERROR: [0] PCReset_ILU line 23 /home/acro018/software/PETSc/c
>> ode/src/ksp/pc/impls/factor/ilu/ilu.c
>> > [0]PETSC ERROR: [0] PCReset line 75 /home/acro018/software/PETSc/c
>> ode/src/ksp/pc/interface/precon.c
>> > [0]PETSC ERROR: [0] KSPReset line 955 /home/acro018/software/PETSc/c
>> ode/src/ksp/ksp/interface/itfunc.c
>> > [0]PETSC ERROR: [0] PCReset_ASM line 595 /home/acro018/software/PETSc/c
>> ode/src/ksp/pc/impls/asm/asm.c
>> > [0]PETSC ERROR: [0] PCReset line 75 /home/acro018/software/PETSc/c
>> ode/src/ksp/pc/interface/precon.c
>> > [0]PETSC ERROR: [0] KSPReset line 955 /home/acro018/software/PETSc/c
>> ode/src/ksp/ksp/interface/itfunc.c
>> > [0]PETSC ERROR: Note: The EXACT line numbers in the stack are not
>> available,
>> > [1]PETSC ERROR:       INSTEAD the line number of the start of the
>> function
>> > [1]PETSC ERROR:       is given.
>> > [1]PETSC ERROR: [1] MatDestroy_SeqBAIJ_Submatrices line 220
>> /home/acro018/software/PETSc/code/src/mat/impls/baij/seq/baij2.c
>> > [1]PETSC ERROR: [1] MatDestroy line 1160 /home/acro018/software/PETSc/c
>> ode/src/mat/interface/matrix.c
>> > [1]PETSC ERROR: [1] PCReset_ILU line 23 /home/acro018/software/PETSc/c
>> ode/src/ksp/pc/impls/factor/ilu/ilu.c
>> > [1]PETSC ERROR: [1] PCReset line 75 /home/acro018/software/PETSc/c
>> ode/src/ksp/pc/interface/precon.c
>> > [0] SNESReset line 2796 /home/acro018/software/PETSc/c
>> ode/src/snes/interface/snes.c
>> > [0]PETSC ERROR: [0] SNESDestroy line 2852 /home/acro018/software/PETSc/c
>> ode/src/snes/interface/snes.c
>> > [0]PETSC ERROR: --------------------- Error Message
>> --------------------------------------------------------------
>> > [0]PETSC ERROR: Signal received
>> > [0]PETSC ERROR: See http://www.mcs.anl.gov/petsc/documentation/faq.html
>> for trouble shooting.
>> > [0]PETSC ERROR: [1]PETSC ERROR: [1] KSPReset line 955
>> /home/acro018/software/PETSc/code/src/ksp/ksp/interface/itfunc.c
>> > [1]PETSC ERROR: [1] PCReset_ASM line 595 /home/acro018/software/PETSc/c
>> ode/src/ksp/pc/impls/asm/asm.c
>> > [1]PETSC ERROR: [1] PCReset line 75 /home/acro018/software/PETSc/c
>> ode/src/ksp/pc/interface/precon.c
>> > [1]PETSC ERROR: [1] KSPReset line 955 /home/acro018/software/PETSc/c
>> ode/src/ksp/ksp/interface/itfunc.c
>> > [1]PETSC ERROR: [1] SNESReset line 2796 /home/acro018/software/PETSc/c
>> ode/src/snes/interface/snes.c
>> > [1]PETSC ERROR: [1] SNESDestroy line 2852 /home/acro018/software/PETSc/c
>> ode/src/snes/interface/snes.c
>> > [1]PETSC ERROR: --------------------- Error Message
>> --------------------------------------------------------------
>> >
>> > --
>> > Dr Adrian Croucher
>> > Senior Research Fellow
>> > Department of Engineering Science
>> > University of Auckland, New Zealand
>> > email: a.croucher at auckland.ac.nz
>> > tel: +64 (0)9 923 4611
>> >
>>
>>
>
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