Cross-Process Synchronization Improves VR Performance

July 30, 2018

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The modern VR rendering pipeline involves multiple steps broadly categorized as rendering and post processing. Post rendering, the HMD compositor processes the rendered views to better suit the characteristics of the display and to compensate for pose latency before the textures are displayed. Figure 1 illustrates the process flow. This post discusses cross-process synchronization, NVIDIA’s API to improve overall VR performance.Figure 2 outlines a typical scheduling model adopted where frames rendered by the VR game process are composited by the VR compositor process before they are flipped to the display.

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