[Trilinos-Users] Epetra_FECrsMatrix memory issues?

[Nico Schlömer]

Bugfix from commit 2b5b2f83b8a0b272fa1c379c61f900856acdff2c confirmed.
Thanks Alan!

--Nico



On Tue, Jul 3, 2012 at 9:00 PM, Nico Schlömer <nico.schloemer at gmail.com> wrote:
> Hi all,
>
> I recently discovered that, for large-scale problems, my (LOCA-based)
> application code consumes more and more memory as the computation goes
> along, eventually resulting in an ungraceful exit of it all. I now did
> a memory profile of the code and, surprisingly, a large chunk of the
> memory that is consumed are "std::vectors", supposedly allocated by
> Epetra_FECrsMatrix::InputNonlocalValue().
>
> The design of the code is such that there is an Epetra_FECrsMatrix
> factory with a cache of one matrix (all of the matrices in my code
> have the same graph). Upon calling the giveMeAMatrix() for this
> factory, the cache gets (conditionally) recreated and is subsequently
> copied out. It seems that this recalculate process eats more memory as
> more and more matrices are computed.
> I put up a memory profile for anyone to look at
> <http://win.ua.ac.be/~nschloe/other/massif.out.3902>, e.g., using the
> massif-visualizer (which I also attached a screen shot).
>
> Anyone with similar issues here, or an idea for a remedy?
>
> Cheers,
> Nico