I want to join to this thread with similar experience on Windows. I am getting the same thing, where the frame rate goes to 2-3fps and then goes higher to some real time. No idea where it comes from. -Nick
On Mon, Mar 15, 2010 at 1:03 PM, Adrian Lindberg <[email protected]> wrote: > 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 >
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