SteamVR,Unity5.5.3 - WaitGetPoses drops causing performance spikes

Target Platforms XR
1

Hello,

Attached is a trace of performance for our game.

We see WaitGetPoses drop to nothing for roughtly 3 secs and then pop back up.

This causes nearly everything else to pike up. Very bad.

We see this every 10 secs of so. It seems to be independent of any section of the game. Vsync is turned off and RenderScale = 1. Unity 5.5.3.

Any ideas what could do this?

Thanks

1920×1080 754 KB

2

no one has any ideas? :frowning:

3

Have you figured out anything with this?

We’re having a very similar issue that we thought was tied to garbage collection. However these big spikes in WaitGetPoses come along almost independently of when we drop a frame or two to the GC. Dropping a few frames would be annoying (when we’re typically at 90 otherwise,) but the big issue is it kicks us out of our application for a moment and draws the Steam VR room with the lighthouses and such visible – incredibly jarring.