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Third Party Issue
Third Party Issue in 2023.2.X
Votes
1
Found in
2020.3.46f1
2021.3.20f1
2022.2.9f1
2023.1.0b5
2023.2.0a4
Issue ID
UUM-29112
Regression
No
[Quest 2] GfxDeviceVK.ExecuteCommandList spikes CPU Usage when built with Vulkan
Reproduction steps:
1. Open the attached project "VulkanHitchMiniproj"
2. Switch the platform to Android
3. Make sure Vulkan is set as Graphics API in Edit > Build Settings > Player Settings
4. Tick “OVROverlay” Scene in Build Settings
5. Tick “Development Build” and “Autoconnect Profiler” in Build Settings
6. Build And Run on Oculus Quest 2 device
7. Observe the Profiler window
Expected result: No CPU Usage spikes appear
Actual result: GfxDeviceVK.ExecuteCommandList process spikes CPU Usage by up to ~40m
Reproducible with: 2020.3.46f1, 2021.3.20f1, 2022.2.9f1, 2023.1.0b5, 2023.2.0a4
Reproducible with devices:
VLNQA00379, Oculus (Quest 2), Android 10, CPU: Snapdragon XR2, GPU: Adreno (TM) 650
Reproducible on: Windows 10 Enterprise 21H2
Notes:
- Does not reproduce on OpenGLES 3
- Artifacts are seen in Player
- It appears that the Vulkan submission thread is performing ExecuteCommandList for an irregularly long time, which is blocking the render thread and subsequently the main thread
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Resolution Note:
This is an issue in [Meta's SDK|https://developer.oculus.com/downloads/package/unity-integration/] which was fixed in version 50.
Resolution Note (2023.2.X):
This is an issue in [Meta's SDK|https://developer.oculus.com/downloads/package/unity-integration/] which was fixed in version 50.