Hi Dominik,
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.
Hmm looks really like a driver problem. Can you try to switch to
software rendering?
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.
The addRefCP is correct without it you get undefined behavior because
the setImage() call dereferences the "old" image pointer so in the next
run you are working with invalid pointers.
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
Can you try something like this:
const int TexGenSceneModifier::apply(double ttime,double etime)
{
_frameCount++;
_elapsedTime+=etime;
if(_frameCount>=_imgChangeInterval)
{
_frameCount=0;
_elapsedTime=0;
_currentImage=(_currentImage+1)%(_imgSeqMax-_imgSeqMin+1);
ImagePtr tmpimg = Image::create();
tmpimg->set(_images[_currentImage]);
beginEditCP(_txAdd,OSG::TextureChunk::ImageFieldMask);
_txAdd->setImage(tmpimg);
endEditCP(_txAdd,OSG::TextureChunk::ImageFieldMask);
}
(...)
return 0;
}
Andreas
--
Andreas Zieringer [EMAIL PROTECTED]
Fraunhofer IGD - A4 phone +49 (0)6151 155 289
Fraunhoferstr. 5 fax +49 (0)6151 155 196
D-64283 Darmstadt www.igd.fhg.de/www/igd-a4
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