On 03/07/2019 21:47, Tomas Eilsoe wrote:
We observe a large period of waiting between the cull and the draw calls, which seems weird. See attached pic.
I suspect that this is because of vsync; your frame rate is ~60hz which is likely the monitor frequency.
With my system (AMD R9-290) I only get the orange "GPU" sections when running with vsync; if I disable it (traits->vsync = false) then these disappear and more than 60hz is possible so I generally lock to 60hz application side by waiting the appropriate amount after rendering has finished.
I generally run with vsync disabled because it seems there is something about the AMD driver that causes a vsync wait between each camera; I wrote some notes about this http://chateau-logic.com/content/deferred-rendering-rembrandt-performance
Anybody have a hint on how to debug this ?
Disable vsync and see what happens. _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
