Hi Vaibhav,
Vaibhav Saxena wrote:
> Hi All,
>
> Has anybody done any memory leak analysis of OpenSG on Windows ?
>
I periodically check for memory leaks (not on Windows, but that
shouldn't make a difference). I use valgrind, which is pretty picky
about these things.
> I tried to figure out if there are any memory leaks in OpenSG on
> Windows and got few memory leaks. Here is what I did :
>
> I took OpenSG tutorial example 01hello.cpp and made two cut short
> versions of it :
> Program 1 : containing just osgInit and osgExit
> Program 2 : 01hello.cpp without glut motion and mouse callbacks etc
>
> [Code for these two programs is pasted below together with their
> memory dump statistics]
>
> Running these two programs in debug mode (with OpenSG debug libraries)
> shows following memory leak statistics :
>
> Program 1 (OpenSG 1.6) : 176 bytes leaked
> Program 1 (OpenSG current CVS build) : 4 bytes leaked
>
> Program 2 (OpenSG 1.6) : 343000 bytes leaked
> Program 2 (OpenSG current CVS build) : 350116 bytes leaked
>
> Is this kind of memory leak expected or already known to exist ? Is
> there anyway to avoid/fix these memory leaks ? My only worry is that
> if we increase the complexity of the application the memory leak might
> go even higher.
>
So far I haven't found any real memory leaks. I define those as things
that keep growing as the app runs, e.g. you keep displaying and changing
things and memory keeps on growing. I haven't seen any of those in a while.
For your second test: osgExit does not guarantee that all memory is
freed. There can still be some static internal structures that use a
fixed amount of memory, and right now I'm unsure whether it frees all
FieldContainers. Can anybody take a quick look at the code to confirm that?
Yours
Dirk
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