Re: Memory leak in TORCS?

Hi Bernhard,

thank you for the reply.

I know Valgrind and already used it for debugging some of my personal
projects.
I would be glad to help in debugging the game.
I did some run with valgrind but I  was not able to resolve symbols... I
suppose this is due to dynamic modules.

Do you know how to solve this problems (or there is any documentation
about that...).

Thank you very much.
Daniele

Bernhard Wymann wrote:
> Hi Daniele
>
>   
>> my name is Daniele Loiacono and I am a Postdoc at Politecnico di Milano
>> (Italy).
>> In the last months I am working on applying Machine Learning techniques
>> to TORCS as I think it is a very nice testbed for many techniques.
>>
>> I discovered a memory leak in TORCS when the race is restarted. I am
>> using TORCS 1.3.0 on Linux (Open Suse) and each time the race is
>> restarted the memory used increase approximately of 500KBytes. As I
>> extended TORCS with an automatic restart procedure to apply Machine
>> Learning to it, I quickly get a memory overflow.
>>
>> I tried to debug TORCS to locate the leak and it seems to be related
>> with the loading of Track information, but I was not able to understand
>> where exactly the problem is?
>>     
>
> Then you have to dig deeper. I hunted down loads of leaks already, but a few I 
> could not fix back then (at least not quickly, and under "normal use" it was 
> acceptable to leave those). IIRC the following are open:
> - plib is not intended for dynamic linking, so this leaves some garbage everytime.
> - TORCS isself has some open points, I think there was a problem with releasing 
> the cameras as example.
> - The environment (X11/OpenGL) did leak some resources as well back then.
>
> If you do not already use it, install valgrind. It makes execution about 50 
> times slower, but is great to find leaks etc. I you find some fixes or if you 
> can identify to problem, let us know.
>
> Hope this helps
>
> Bernhard
>
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-- 
Daniele Loiacono, PhD Student
AI & Robotics Lab
Politecnico di Milano (Italy)
http://home.dei.polimi.it/loiacono
Phone  +39 02 2399 3540


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