[PyKDE] memleak with QMovie

[Russell Valentine]

Phil Thompson said the following on 09/18/05 14:07:
> On Sunday 18 September 2005 6:12 pm, Russell Valentine wrote:
> 
>>Phil Thompson said the following on 09/18/05 05:18:
>>
>>>On Sunday 18 September 2005 9:04 am, Russell Valentine wrote:
>>>
>>>>I've been seeing a mem leak in my PyKDE application for several months.
>>>>I figured it was because I upgraded KDE to 3.4 or something because I
>>>>saw it around that time. I finally made my self try to figure out where
>>>>the leak was coming from and narrowed it down to QMovie.
>>>
>>>Difficult to see how this would be a PyQt problem. I'd try a C++ version
>>>and see if the problem is still there.
>>>
>>>Phil
>>
>>I tried a C++ version and I see no memory leak. So it seems localized to
>>something with PyQt. Attached is a tar with the C++ code and the python
>>one for comparison.
> 
> 
> They both do the same thing for me - which is nothing. Am I missing something? 
> The Qt movies example plays the file fine.
> 
> Phil


So the python example on your system doesn't eventually use up a lot of
memory?

For example on my system:

$ python memleak.py& ps auxw| head -n 1|awk '{ print $4" "$11"
"$12}';while `/bin/true`; do
ps auxw|grep memleak | grep -v grep | awk '{ print $4" "$11" "$12}'
sleep 60
done

OUTPUT:
%MEM COMMAND
2.1 python memleak.py
2.3 python memleak.py
2.5 python memleak.py
2.7 python memleak.py
2.9 python memleak.py
3.0 python memleak.py
3.2 python memleak.py
... higher %MEM everytime

If I run it for a few hours, all my RAM is being used by python. Comment
out the QMovie statement and the memory usage is constant.

As compared to the C++ version of the program on my system.

$ ./memleak& ps auxw| head -n 1|awk '{ print $4" "$11" "$12}';while
`/bin/true`; do
ps auxw|grep memleak | grep -v grep | awk '{ print $4" "$11" "$12}'
sleep 60
done

OUTPUT:
%MEM COMMAND
1.4 ./memleak
1.4 ./memleak
1.4 ./memleak
1.4 ./memleak
1.4 ./memleak
1.4 ./memleak
1.4 ./memleak
1.4 ./memleak
... constant mem usage


The python version without QMovie:

$ python memleak-noqmovie.py& ps auxw| head -n 1|awk '{ print $4" "$11"
"$12}';while `/bin/true`; do
ps auxw|grep memleak | grep -v grep | awk '{ print $4" "$11" "$12}'
sleep 60
done

OUTPUT:
%MEM COMMAND
1.9 python memleak-noqmovie.py
2.0 python memleak-noqmovie.py
2.0 python memleak-noqmovie.py
2.0 python memleak-noqmovie.py
2.0 python memleak-noqmovie.py
2.0 python memleak-noqmovie.py
2.0 python memleak-noqmovie.py
2.0 python memleak-noqmovie.py
2.0 python memleak-noqmovie.py
2.0 python memleak-noqmovie.py
2.0 python memleak-noqmovie.py
... constant mem usage


So if it isn't doing it on your system, I wonder what is different with
mine that causes this. It does it on two of my systems Debian and
Gentoo. Alright then, if it was just me sorry to bother you, I thought I
was onto something. If I ever figure out the reason for this I'll post
it in case anyone was curious.


Russell Valentine