koobas.hobune.stream
VR.WaitForGPU lag UNLESS camera is selected in editor
I'm getting giant, regular spikes of "VR.WaitForGPU" - but ONLY when the active camera isn't selected in the hierarchy. If I simply select the camera, my FPS goes from 60-100 up to 200.
I'm running 5.4f1 with a Vive.
I'm also seeing this on 5.4f1. The spikes are very regular, usually up to a time of 16-17 ms. I didn't notice any change from selecting the camera. In the GPU profiler the spikes are attributed to the "Other" category.
I also tried it in Unity 5.3.4f1, and saw similar spikes, though they were attributed to different causes. In the CPU profiler the spikes appears as "S$$anonymous$$mVR_Render.RenderLoop() [Coroutine: $$anonymous$$oveNext]" inside "PlayerEndOfFrame". In the GPU profiler the spikes are attributed to "RenderTexture.SetActive", with the spikes going up to ~20 GPU ms.
I have a GTX 1070 and an A$$anonymous$$D FX-8350. Hopefully this info helps someone figure it out.
Side note - the issue persists upon building. Is there some way to tell Unity to act as if the camera is selected, at runtime?
Getting the same thing... the spikes are about 16ms. I had not noticed that selecting the camera makes a difference, good catch:)
What could be going on here?
Yeah this is crazy, I get it too. I hadn't noticed the same lag building though, like mgc mentioned.
To make the issue less annoying (certainly not a fix) I whipped up a script to select the camera whenever you press play (just attach to your camera eye object)
using UnityEngine;
#if DEBUG
using UnityEditor;
#endif
//attach this to the object you want to become selected when 'Play' is pressed in the editor
//purpose: to fix the Unity/VR bug where framerate tanks if camera eye isn't selected
public class SelectedOnPlay : MonoBehaviour {
#if DEBUG
SelectedOnPlay() {
EditorApplication.playmodeStateChanged = HandleOnPlayModeChanged;
}
void HandleOnPlayModeChanged()
{
if (EditorApplication.isPlaying)
{
//select this object
if(Selection.activeObject != gameObject)
Selection.activeObject = gameObject;
}
}
#endif
}
Using this script in the camera gives me 4% increment in fps performance.
Really strange. Definitely see a huge FPS boost when the camera is selected, thanks for the temp fix at least. Running Unity 5.6.1f1 with S$$anonymous$$mVR plugin 1.2.2 for Vive
Edit: Although I notice that when the camera is selected now, the tracking on the controllers is really laggy :(
Edit 2: Actually, it seems that my lag/fps issues were solved by maximizing the game viewport on play (when playing in the editor). Idea suggested by a Valve dev here: https://s$$anonymous$$mcommunity.com/app/358720/discussions/0/357286532028854272/
