Does the CPU wait on the GPU?

[mbucchia]

Take a look at that explanation:

OpenXR Toolkit (upscaling, world scale, hand tracking...) - Release thread

Alright! I have spent some time analyzing traces from MSFS and understading the patterns, and I can finally explain what we are seeing here. In the most basic scenario, the one where you are CPU-bound, there is little choice: the CPU performs all operations for frame N, including enqueuing commands for the GPU rendering, and all of it must completes before starting frame N+1. We have something that looks like this: [image] Pretty straightforward: the app CPU measurement envelopes all the wo…