[petsc-users] Unexplained memory leaks

[Satish Balay]

Its best to build PETSc with --download-mpich for use with valgrind.

Satish

On Fri, 28 Aug 2020, baikadi pranay wrote:

> Thank you Mark and Matthew. I will try to use the suppression file to hide
> the leaks.
> 
> On a different note, I see a similar error related to MPI when I couple my
> poisson solver with the schrodinger solver (written with SLEPc). I am
> attaching a screenshot of the error. I was wondering if you could comment
> on this issue as well.
> 
> Please let me know if you need any further information from me.
> 
> Thank you.
> 
> Best Regards,
> Pranay.
> ᐧ
> 
> On Fri, Aug 28, 2020 at 5:48 AM Mark Lohry <mlohry at gmail.com> wrote:
> 
> > Looking through my own valgrind I saw OpenMPI mentions on their faq they
> > provide a suppression file to hide their known leaks:
> > https://www.open-mpi.org/faq/?category=debugging#valgrind_clean
> >
> > mpirun -np 2 valgrind --suppressions=$PREFIX/share/openmpi/openmpi-valgrind.supp
> >
> >
> >
> > On Fri, Aug 28, 2020 at 7:41 AM Matthew Knepley <knepley at gmail.com> wrote:
> >
> >> OpenMPI leaks memory at the end. As you can see it is small, so they are
> >> unmotivated to fix that.
> >>
> >>   Thanks,
> >>
> >>      Matt
> >>
> >> On Fri, Aug 28, 2020 at 4:31 AM baikadi pranay <pranayreddy865 at gmail.com>
> >> wrote:
> >>
> >>> Hi,
> >>> I am building a 2D solver for the semiconductor Poisson-Boltzmann
> >>> equation. I detected a memory leak when running the program using valgrind
> >>> but I am unable to solve this issue as there are no signs in the valgrind
> >>> output indicating that the source of the error is in the modules I have
> >>> written. I am attaching you a text file containing the valgrind output.
> >>>
> >>> I have seen that a similar question was asked earlier (found here
> >>> <https://lists.mcs.anl.gov/pipermail/petsc-users/2010-October/007132.html>)
> >>> but I could not find a final solution to that problem. Could you let me
> >>> know the source of the problem?
> >>>
> >>> Please let me know if you need any further information.
> >>>
> >>> Thank you,
> >>> Pranay.
> >>> ᐧ
> >>>
> >>
> >>
> >> --
> >> What most experimenters take for granted before they begin their
> >> experiments is infinitely more interesting than any results to which their
> >> experiments lead.
> >> -- Norbert Wiener
> >>
> >> https://www.cse.buffalo.edu/~knepley/
> >> <http://www.cse.buffalo.edu/~knepley/>
> >>
> >
>