So I've been getting in to OSG, much thanks to the help here on the mailing list/forum. But I'm having some issues with performance which I can't seem to pinpoint.
I use extensive PagedLOD, in a similar way osgTerrain does it (using quad-trees). For me performance is the king and quality is secondary, so I want to have a frame rate that is at least 30 fps at all times (given some minimum requirements). When all LODs are loaded I get constant 60 fps which is due to the screen synch and when moving around I tend to get 20-30 fps due to loading. However, it is not uncommon that the fps dips completely and falls to sub 1 fps for a short while (up to a few seconds) and then resumes the 20-30 fps target. What I've tried so far is to set the setMaximumNumOfObjectsToCompilePerFrame to a very low value (1) and set the thread priority for the DatabasePager to low. I'm using VBO:s for vertex data and am currently running OSX 10.6 with OSG 2.9.6. For me it's vital to get rid of these dip, I'd much rather display low res data then getting drops. Profiling for me through Xcode seems to put the DatabasePager out of order so I can't really pinpoint why I'm getting these drops. Any ideas or suggestions? Cheers, Adrian ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=25647#25647 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
