[Digikam-devel] [Bug 131277] Memory leak in image editor

[krienke at uni-koblenz.de]

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http://bugs.kde.org/show_bug.cgi?id=131277         




------- Additional Comments From krienke uni-koblenz de  2006-07-24 10:24 -------
Am Montag, 24. Juli 2006 08:26 schrieb Gilles Caulier:
[bugs.kde.org quoted mail]

I ran valgrind --tool=memcheck --leak-check=full --error-limit=no /opt/kde3/bin/digikam 
but there was no information in the output about  a big leak as I would have expected because of the observed decrease in free memory:

<ran through ~20 photos in image editor, then terminated digikam>
==7042== LEAK SUMMARY:
==7042==    definitely lost: 6,349 bytes in 75 blocks.
==7042==    indirectly lost: 40,174 bytes in 879 blocks.
==7042==      possibly lost: 400 bytes in 3 blocks.
==7042==    still reachable: 437,184 bytes in 7,824 blocks.
==7042==         suppressed: 0 bytes in 0 blocks.
==7042== Reachable blocks (those to which a pointer was found) are not shown.
==7042== To see them, rerun with: --show-reachable=yes


However afterwards I ran free -m then started digikam and in the imageeditor ran through 50 photos,
terminated digikam and then again ran free -m:

[krienke bliss:~] 589 > free -m
                    total       used       free     shared    buffers     cached
Mem:          1012        687        324          0          9        571
-/+ buffers/cache:        106        905
Swap:         2055        208       1846

<run of digikam> 

[krienke bliss:~] 589 > free -m
                   total       used       free     shared    buffers     cached
Mem:          1012        677        335          0          4        436
-/+ buffers/cache:        236        775
Swap:         2055        377       1677

In this case the usage of swap increased by ~160MB which is the strange behaviour I 
observed but valgrind does not say anything. I do not understand this. 

Next I started digikam once more again looked at the very same 50 photos in imageeditor 
and then terminated  digikam again. The free calls are again from before starting digikam 
and after terminating it:

krienke bliss:~] 587 > free -m
                    total       used       free     shared    buffers     cached
Mem:          1012        688        323          0         10        449
-/+ buffers/cache:        228        783
Swap:         2055        375       1679

<digikam run. Looked at  50 photos in imageeditor>

[krienke bliss:~] 588 > free -m
                   total       used       free     shared    buffers     cached
Mem:          1012        694        317          0          6        390
-/+ buffers/cache:        296        715
Swap:         2055        570       1484
 
No again another 125 MB of swap has been eaten up.

Any idea by what this behaviour might been caused?

Thanks 
Rainer