I found there is a space (<- ? -> in the below picture) between the rendering and tiler process. What it is? What makes GPU wait so long for rendering?
does cause by the 3D model matrix binding?
Apologies for the late reply, I missed this post and only found it during a cleaning up.
Usually long waits are waiting for Vertical Synchronisation (Vsync).
Sometimes it may be other CPU work being performed, but in almost all cases this kind of wait shows that Vsync is enabled, which means that the GPU will only be performing as much work as necessary to render frames that are going to be displayed at the maximum rate possible on the platform.