Re: Memory Leak & openmpi_ext

[Sukanta Basu]

I have also created another simple octave code utilizing openmpi_ext
(see attached).

I used massif tool to analyze memory usage:
valgrind --tool=massif --time-unit=ms  mpirun -np 4 octave -q --eval
OCTLES_TEST &

The output of ms_print is attached. In general, the memory consumption
increases with time (some fluctuations are noticeable). This should
not be the case.

I am not sure if the problem is coming from openmpi or openmpi_ext (in Octave).

Please advice.

Sukanta

On Sun, May 5, 2013 at 1:51 PM, Sukanta Basu <address@hidden> wrote:
> Hi Carlo and Carne,
>
> I hope all is well.
>
> A few months ago, you helped me with the openmpi_ext toolbox. This
> toolbox works like a charm. Unfortunately, I am facing a memory leak
> issue with this toolbox. I noticed this leak on all the platforms I
> have access to: Ubuntu (12.04, 12.10, and 13.04) and RedHat systems.
> The leak persists for all the recent versions of openmpi (1.6.2,
> 1.6.4, 1.7.1).
>
> Since my original code is too complicated for others to debug, I
> created a sample code for testing. Basically, I modified the
> speedtest.m file (written by Dr. Jeremy Kepner; MatlabMPI) to work in
> conjunction with openmpi_ext. I then ran this code with valgrind:
>
> valgrind --leak-check=yes -v --log-file=Valgrind.out mpirun -np 2
> octave -q --eval speedtest &
>
> The summary of valgrind is:
> ==24981==    definitely lost: 42,031 bytes in 28 blocks
> ==24981==    indirectly lost: 25,802 bytes in 76 blocks
> ==24981==      possibly lost: 0 bytes in 0 blocks
> ==24981==    still reachable: 124,717 bytes in 603 blocks
> ==24981==         suppressed: 0 bytes in 0 blocks
>
> I would appreciate if you could help me out with identifying the
> memory leak in openmpi_ext. I am attaching the speedtest.m file and
> Valgrind.out file.
>
> Best regards,
> Sukanta
>
> --
> Sukanta Basu
> Associate Professor
> North Carolina State University
> http://www4.ncsu.edu/~sbasu5/



-- 
Sukanta Basu
Associate Professor
North Carolina State University
http://www4.ncsu.edu/~sbasu5/

MSPRINT
Description: Binary data

OCTLES_TEST.m
Description: Binary data