Unity Issue Tracker - [VR]EarlyUpdate.XRUpdate's CPU usage increases by about 2.4ms every 10minutes if the Unity Player isn't focused on

Fixed in 2019.2.X

Duplicate in 2018.3.X

Fixed in 2018.3.X, 2019.1.X

Votes

75

Found in

2017.4.0f1

2018.3.0a1

2018.3.0f2

2019.1.0a1

Issue ID

1112790

Regression

No

[VR]EarlyUpdate.XRUpdate's CPU usage increases by about 2.4ms every 10minutes if the Unity Player isn't focused on

XR SDK

Dec 26, 2018

Steps to reproduce:

1. Create a new project
2. Enable VR
3. Build for standalone with "Development Build" and "Auto-Connect Profiler"
4. Run the build with an HMD attached
5. Open the profiler window
6. Make sure it is connected to the player
7. Leave the player running while unfocused for at least 20 minutes

Result: CPU usage spikes start occurring, player becomes laggy and continues to become worse as time goes on

Reproduced on 2017.4.0f1, 2017.4.17f1 2018.3.1f1, 2019.1.0a13

Resolution Note (fix version 2019.2):

Fixed in 2018.3.10f1

Comments (32)

jinhaifeng

Jan 28, 2019 18:26

also encountering this issue in 2018.2.14f1
GCCooper

Jan 25, 2019 20:33

I was unable to reproduce this in 2018.1.1 and 2018.1.9, but did reproduce in 2018.2.0, so it seems like it was introduced in 2018.2
GCCooper

Jan 19, 2019 09:05

I am also getting this problem, setting executable focus back to our app eliminates the lag but it is not a good solution.
tom_fv

Jan 17, 2019 12:36

This is a bad bug for our kind of application (Enterprise VR where we often have a VR client and a normal client with GUI running on the same PC, so the VR client isn't focused.

We have found these repro steps also happen in 2018.3.2f1 and 2018.2.19f1

Hope it gets fixed soon
nobuh_

Jan 08, 2019 07:52

This problem must be a show stopper for some kind of games.
il-m-sato

Jan 08, 2019 06:38

Please fix this!
t-kuhn

Jan 08, 2019 06:28

Please fix this!