Hi, Sorry for reusing this old thread. It seems that nobody has found a solution for the problem yet that also works for me.
When running "osgviewer cow.osg" on a dual-core PC, I get a CPU usage of 50%, which indicates that one core is used at 100%. System: ATI Mobility Radeon HD 2400 Windows XP However, with the same application, CPU usage is only at 5% on the following system: nVidia GeForce 9400 Windows XP I have tried --SingleThreaded on the ATI system, but it seems to have no effect. Furthermore, I also get 50% CPU usage on another dual-core system with Windows Vista and nVidia GeForce 9400 if the single threaded model is used. With the default threading model, CPU usage goes up to 100%. I am using OSG version 2.6.0. V-Sync was enabled in all tests (using global driver settings, e.g. in Catalyst Control Center). The frame rate was constant and there was no tearing. So far, I have read all kinds of rumors about this issue from various sources. There are even older threads about this on the OSG mailing list. This is what I found so far: http://lists.openscenegraph.org/pipermail/osg-users-openscenegraph.org/2007-November/004363.html http://www.gamedev.net/community/forums/topic.asp?topic_id=445562 Has anyone found a definitive solution to this problem yet? Can anyone confirm or deny that this is actually a problem and not a bug in Windows Task Manager showing the wrong CPU usage? Has something been done to address this problem in newer versions of OSG? Tearing prevention is absolutely necessary in my application, and a "manual" implementation of V-sync seems to be not accurate enough for the task. Thanks in advance, fw _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
