[petsc-users] MUMPS failure

[Junchao Zhang]

On Mon, Mar 22, 2021 at 1:39 PM Barry Smith <bsmith at petsc.dev> wrote:

>
>    Version of PETSc and MUMPS? We fixed a bug in MUMPs a couple years ago
> that produced error messages as below. Please confirm you are using the
> latest PETSc and MUMPS.
>
>    You can run your production version with the option -malloc_debug ;
> this will slow it down a bit but if there is memory corruption it may
> detect it and indicate the problematic error.
>
>     One also has to be careful about the size of the problem passed to
> MUMPs since PETSc/MUMPs does not fully support using all 64 bit integers.
> Is it only crashing for problems near 2 billion entries in the sparse
> matrix?
>
 "problems near 2 billion entries"?  I don't understand. Should not be an
issue if building petsc with 64-bit indices.


>      valgrind is the gold standard for detecting memory corruption.
>
> Barry
>
>
> On Mar 22, 2021, at 12:56 PM, Chris Hewson <chris at resfrac.com> wrote:
>
> Hi All,
>
> I have been having a problem with MUMPS randomly crashing in our program
> and causing the entire program to crash. I am compiling in -O2 optimization
> mode and using --download-mumps etc. to compile PETSc. If I rerun the
> program, 95%+ of the time I can't reproduce the error. It seems to be a
> similar issue to this thread:
>
> https://lists.mcs.anl.gov/pipermail/petsc-users/2018-October/036372.html
>
> Similar to the resolution there I am going to try and increase icntl_14
> and see if that resolves the issue. Any other thoughts on this?
>
> Thanks,
>
> *Chris Hewson*
> Senior Reservoir Simulation Engineer
> ResFrac
> +1.587.575.9792
>
>
>
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