Hi,
I've a got a very strange bug here, that appeared suddenly in code that
was already working for some weeks (caustics, remember?) and now leaks
quite some memory (about 150kb/sec) on the server side. Even more
strange is, that not all servers are leaking but only some (2-8 of 10)
of them (randomly distributed). Only node one, where the client and the
server are running is never leaking. Another very disturbing fact is,
that I don't see any increase of my application memory usage in top or
ps: My server starts and stays at ~65% memory usage, while a watch free
shows my a constant memory decrease. That's the reason while I first
thought that this may be a kernel / driver problem.
This is definitely related to changing my images in the TextureChunk
(the leak disappears if I comment out the setImage line), so I wonder if
there is some undefined behaviour in here?
Some code:
I've got 32 Images that I load to an member array of my class in the
first function:
void TexGenSceneModifier::load(){
int size=imgSeqMax-imgSeqMin+1;
_images=new ImagePtr[size];
int j=0;
for(int i=imgSeqMin;i<=imgSeqMax;i++){
_images[j]=OSG::Image::create();
beginEditCP(_images[j]);
_images[j]->read(filename); //simplified for readability
endEditCP(_images[j]);
addRefCP(_images[j]);
j++;
}
(...)
//_txAdd is a TextureChunk
beginEditCP(_txAdd);
_txAdd->setImage(_images[_currentImage]); // _ curentImage=0 here
_txAdd->setMinFilter(GL_LINEAR_MIPMAP_LINEAR);
_txAdd->setMagFilter(GL_LINEAR);
_txAdd->setEnvMode(GL_MODULATE);
_txAdd->setWrapS(GL_REPEAT);
_txAdd->setWrapT(GL_REPEAT);
endEditCP(_txAdd);
}
I was never really sure about that addRefCP() here, but it crashes after
some (unpredictable 1minute-2hours) time if I don't use it -
nevertheless, it doesn't leak memory while running.
Now I want to change this image per frame, so in my apply() (this is
called in the display Func) I do the following:
const int TexGenSceneModifier::apply(double ttime,double etime){
_frameCount++;
_elapsedTime+=etime;
if(_frameCount>=_imgChangeInterval){
_frameCount=0;
_elapsedTime=0;
_currentImage=(_currentImage+1)%(_imgSeqMax-_imgSeqMin+1);
beginEditCP(_txAdd,OSG::TextureChunk::ImageFieldMask);
_txAdd->setImage(_images[_currentImage]);
endEditCP(_txAdd,OSG::TextureChunk::ImageFieldMask);
}
(...)
return 0;
}
I'm really sure that this worked for quite some time - why should it
leak now?
System:
Debian (sid) 2.6.9 with Nvidia 6111 Drivers
Last OpenSG CVS checkout about 8 weeks ago.
This is definitely the last pending problem in my project, so please
help me to get my (really needed) vacation.
Thanks & regards,
Dominik
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