HDRP Performance Spikes

Unity Engine
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1

Using Unity 2020.3.19f1 HDRP, with a stationary camera in the provided sample scene, I’m getting these crazy 40-60 ms spikes from Gfx.WaitForPresentOnGfxThread.

Curiously, the spikes are rarer and only about 1/3 as bad when VSync is turned on.

Everything I’ve read while googling indicates a busy GPU, but I’m not seeing anything that would account for the GPU being regularly busy for 50ms.

Any ideas?

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7598500--942781--upload_2021-10-24_11-18-59.png1077×940 107 KB

2

Is this in the editor or a standalone player?

3

In the editor.

4

Try profiling your game in a standalone player and see if the problem persists.