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Won't Fix
Votes
0
Found in
2021.3.33f1
2022.3.15f1
2023.2.3f1
2023.3.0a17
6000.0.0b11
Issue ID
UUM-57940
Regression
No
Application crashes or stucks with “Execution of the command buffer was aborted“ logs when stopping shader execution using UAV condition on mobile devices
How to reproduce:
1. Build And Run the user’s attached “uav_bug.zip” project on a mobile device
2. Observe the quad
Expected result: quad is green
Actual result: app crashes or stucks and logs "Execution of the command buffer was aborted due to an error during execution”
Reproducible with: 2021.3.33f1, 2022.3.15f1, 2023.2.3f1, 2023.3.0a17
Reproduced on:
VLNQA00494 - iPhone 14 Pro Max, 16.3.1 iOS
VLNQA00392 - iPad (9th generation), 15.0 iOS
VLNQA00310 - iPad Pro 12.9", 13.4.1 iOS
Android (Vulkan, OpenGLES) (user’s info)
Not reproducible on:
VLNQA00358 - iPhone 12, 14.1 iOS
Note: not reproducible in the Editor and Standalone Build (macOS)
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Resolution Note:
Hello, this crash seems to happen at the GPU driver level. From looking at the provided project, it seems like the UAV condition on threadId 0 is used as a flag to early out all other compute threads within other workgroups. However, the issue here is that this can potentially cause a deadlock on some devices as there's no guarantee that all groups execute simultaneously or in a particular order. This will cause a deadlock on the threadgroups that are spinning indefinitely waiting for the flag to be set.