Deep profiling causes "Non matching Profiler.EndSample"

Peter77 · November 30, 2019, 8:06am

I was deep profiling EnterPlaymode in an empty Unity 2019.3.0f1 project, where the editor spits out the following errors:

Non matching Profiler.EndSample (BeginSample and EndSample count must match): UnityEngine.IMGUIModule.dll!UnityEngine::GUIUtility.ExitGUI()
Previous 5 samples:
    GC.Alloc
    UnityEditor.dll!UnityEditor::SceneVisibilityState.GeneratePersistentDataForAllLoadedScenes()
    Mono.JIT
    GC.Alloc
    UnityEditor.dll!::AssetStoreClientInternal.IsAnyDownloadInProgress()
In the scope:
    UIElementsUtility.DoDispatch(Non Repaint Event)
    UnityEngine.IMGUIModule.dll!UnityEngine::GUIUtility.ProcessEvent()
    EditorLoop
    Main Thread
Non matching Profiler.EndSample (BeginSample and EndSample count must match): UnityEditor.dll!UnityEditor::Toolbar.DoPlayButtons()
Previous 5 samples:
    GC.Alloc
    UnityEditor.dll!UnityEditor::SceneVisibilityState.GeneratePersistentDataForAllLoadedScenes()
    Mono.JIT
    GC.Alloc
    UnityEditor.dll!::AssetStoreClientInternal.IsAnyDownloadInProgress()
In the scope:
    UIElementsUtility.DoDispatch(Non Repaint Event)
    UnityEngine.IMGUIModule.dll!UnityEngine::GUIUtility.ProcessEvent()
    EditorLoop
    Main Thread
Non matching Profiler.EndSample (BeginSample and EndSample count must match): UnityEditor.dll!UnityEditor::Toolbar.OldOnGUI()
Previous 5 samples:
    GC.Alloc
    UnityEditor.dll!UnityEditor::SceneVisibilityState.GeneratePersistentDataForAllLoadedScenes()
    Mono.JIT
    GC.Alloc
    UnityEditor.dll!::AssetStoreClientInternal.IsAnyDownloadInProgress()
In the scope:
    UIElementsUtility.DoDispatch(Non Repaint Event)
    UnityEngine.IMGUIModule.dll!UnityEngine::GUIUtility.ProcessEvent()
    EditorLoop
    Main Thread
Non matching Profiler.EndSample (BeginSample and EndSample count must match): UnityEngine.UIElementsModule.dll!UnityEngine.UIElements::IMGUIContainer.DoOnGUI()
Previous 5 samples:
    GC.Alloc
    UnityEditor.dll!UnityEditor::SceneVisibilityState.GeneratePersistentDataForAllLoadedScenes()
    Mono.JIT
    GC.Alloc
    UnityEditor.dll!::AssetStoreClientInternal.IsAnyDownloadInProgress()
In the scope:
    UIElementsUtility.DoDispatch(Non Repaint Event)
    UnityEngine.IMGUIModule.dll!UnityEngine::GUIUtility.ProcessEvent()
    EditorLoop
    Main Thread
Non matching Profiler.EndSample (BeginSample and EndSample count must match): UnityEngine.UIElementsModule.dll!UnityEngine.UIElements::IMGUIContainer.HandleIMGUIEvent()
Previous 5 samples:
    GC.Alloc
    UnityEditor.dll!UnityEditor::SceneVisibilityState.GeneratePersistentDataForAllLoadedScenes()
    Mono.JIT
    GC.Alloc
    UnityEditor.dll!::AssetStoreClientInternal.IsAnyDownloadInProgress()
In the scope:
    UIElementsUtility.DoDispatch(Non Repaint Event)
    UnityEngine.IMGUIModule.dll!UnityEngine::GUIUtility.ProcessEvent()
    EditorLoop
    Main Thread
Non matching Profiler.EndSample (BeginSample and EndSample count must match): UnityEngine.UIElementsModule.dll!UnityEngine.UIElements::IMGUIContainer.HandleIMGUIEvent()
Previous 5 samples:
    GC.Alloc
    UnityEditor.dll!UnityEditor::SceneVisibilityState.GeneratePersistentDataForAllLoadedScenes()
    Mono.JIT
    GC.Alloc
    UnityEditor.dll!::AssetStoreClientInternal.IsAnyDownloadInProgress()
In the scope:
    UIElementsUtility.DoDispatch(Non Repaint Event)
    UnityEngine.IMGUIModule.dll!UnityEngine::GUIUtility.ProcessEvent()
    EditorLoop
    Main Thread
Non matching Profiler.EndSample (BeginSample and EndSample count must match): UnityEngine.UIElementsModule.dll!UnityEngine.UIElements::IMGUIContainer.SendEventToIMGUI()
Previous 5 samples:
    GC.Alloc
    UnityEditor.dll!UnityEditor::SceneVisibilityState.GeneratePersistentDataForAllLoadedScenes()
    Mono.JIT
    GC.Alloc
    UnityEditor.dll!::AssetStoreClientInternal.IsAnyDownloadInProgress()
In the scope:
    UIElementsUtility.DoDispatch(Non Repaint Event)
    UnityEngine.IMGUIModule.dll!UnityEngine::GUIUtility.ProcessEvent()
    EditorLoop
    Main Thread
Non matching Profiler.EndSample (BeginSample and EndSample count must match): UnityEngine.UIElementsModule.dll!UnityEngine.UIElements::IMGUIContainer.HandleEvent()
Previous 5 samples:
    GC.Alloc
    UnityEditor.dll!UnityEditor::SceneVisibilityState.GeneratePersistentDataForAllLoadedScenes()
    Mono.JIT
    GC.Alloc
    UnityEditor.dll!::AssetStoreClientInternal.IsAnyDownloadInProgress()
In the scope:
    UIElementsUtility.DoDispatch(Non Repaint Event)
    UnityEngine.IMGUIModule.dll!UnityEngine::GUIUtility.ProcessEvent()
    EditorLoop
    Main Thread
Non matching Profiler.EndSample (BeginSample and EndSample count must match): UnityEngine.UIElementsModule.dll!UnityEngine.UIElements::CallbackEventHandler.HandleEventAtTargetPhase()
Previous 5 samples:
    GC.Alloc
    UnityEditor.dll!UnityEditor::SceneVisibilityState.GeneratePersistentDataForAllLoadedScenes()
    Mono.JIT
    GC.Alloc
    UnityEditor.dll!::AssetStoreClientInternal.IsAnyDownloadInProgress()
In the scope:
    UIElementsUtility.DoDispatch(Non Repaint Event)
    UnityEngine.IMGUIModule.dll!UnityEngine::GUIUtility.ProcessEvent()
    EditorLoop
    Main Thread
Non matching Profiler.EndSample (BeginSample and EndSample count must match): UnityEngine.UIElementsModule.dll!UnityEngine.UIElements::MouseCaptureDispatchingStrategy.DispatchEvent()
Previous 5 samples:
    GC.Alloc
    UnityEditor.dll!UnityEditor::SceneVisibilityState.GeneratePersistentDataForAllLoadedScenes()
    Mono.JIT
    GC.Alloc
    UnityEditor.dll!::AssetStoreClientInternal.IsAnyDownloadInProgress()
In the scope:
    UIElementsUtility.DoDispatch(Non Repaint Event)
    UnityEngine.IMGUIModule.dll!UnityEngine::GUIUtility.ProcessEvent()
    EditorLoop
    Main Thread
Non matching Profiler.EndSample (BeginSample and EndSample count must match): UnityEngine.UIElementsModule.dll!UnityEngine.UIElements::EventDispatcher.ProcessEvent()
Previous 5 samples:
    GC.Alloc
    UnityEditor.dll!UnityEditor::SceneVisibilityState.GeneratePersistentDataForAllLoadedScenes()
    Mono.JIT
    GC.Alloc
    UnityEditor.dll!::AssetStoreClientInternal.IsAnyDownloadInProgress()
In the scope:
    UIElementsUtility.DoDispatch(Non Repaint Event)
    UnityEngine.IMGUIModule.dll!UnityEngine::GUIUtility.ProcessEvent()
    EditorLoop
    Main Thread
Non matching Profiler.EndSample (BeginSample and EndSample count must match): UnityEngine.UIElementsModule.dll!UnityEngine.UIElements::EventDispatcher.ProcessEventQueue()
Previous 5 samples:
    GC.Alloc
    UnityEditor.dll!UnityEditor::SceneVisibilityState.GeneratePersistentDataForAllLoadedScenes()
    Mono.JIT
    GC.Alloc
    UnityEditor.dll!::AssetStoreClientInternal.IsAnyDownloadInProgress()
In the scope:
    UIElementsUtility.DoDispatch(Non Repaint Event)
    UnityEngine.IMGUIModule.dll!UnityEngine::GUIUtility.ProcessEvent()
    EditorLoop
    Main Thread
Non matching Profiler.EndSample (BeginSample and EndSample count must match): UnityEngine.UIElementsModule.dll!UnityEngine.UIElements::EventDispatcher.OpenGate()
Previous 5 samples:
    GC.Alloc
    UnityEditor.dll!UnityEditor::SceneVisibilityState.GeneratePersistentDataForAllLoadedScenes()
    Mono.JIT
    GC.Alloc
    UnityEditor.dll!::AssetStoreClientInternal.IsAnyDownloadInProgress()
In the scope:
    UIElementsUtility.DoDispatch(Non Repaint Event)
    UnityEngine.IMGUIModule.dll!UnityEngine::GUIUtility.ProcessEvent()
    EditorLoop
    Main Thread
Non matching Profiler.EndSample (BeginSample and EndSample count must match): UnityEngine.UIElementsModule.dll!UnityEngine.UIElements::EventDispatcherGate.Dispose()
Previous 5 samples:
    GC.Alloc
    UnityEditor.dll!UnityEditor::SceneVisibilityState.GeneratePersistentDataForAllLoadedScenes()
    Mono.JIT
    GC.Alloc
    UnityEditor.dll!::AssetStoreClientInternal.IsAnyDownloadInProgress()
In the scope:
    UIElementsUtility.DoDispatch(Non Repaint Event)
    UnityEngine.IMGUIModule.dll!UnityEngine::GUIUtility.ProcessEvent()
    EditorLoop
    Main Thread
Non matching Profiler.EndSample (BeginSample and EndSample count must match): UnityEngine.UIElementsModule.dll!UnityEngine.UIElements::EventDispatcher.ProcessEvent()
Previous 5 samples:
    GC.Alloc
    UnityEditor.dll!UnityEditor::SceneVisibilityState.GeneratePersistentDataForAllLoadedScenes()
    Mono.JIT
    GC.Alloc
    UnityEditor.dll!::AssetStoreClientInternal.IsAnyDownloadInProgress()
In the scope:
    UIElementsUtility.DoDispatch(Non Repaint Event)
    UnityEngine.IMGUIModule.dll!UnityEngine::GUIUtility.ProcessEvent()
    EditorLoop
    Main Thread
Non matching Profiler.EndSample (BeginSample and EndSample count must match): UnityEngine.UIElementsModule.dll!UnityEngine.UIElements::EventDispatcher.Dispatch()
Previous 5 samples:
    GC.Alloc
    UnityEditor.dll!UnityEditor::SceneVisibilityState.GeneratePersistentDataForAllLoadedScenes()
    Mono.JIT
    GC.Alloc
    UnityEditor.dll!::AssetStoreClientInternal.IsAnyDownloadInProgress()
In the scope:
    UIElementsUtility.DoDispatch(Non Repaint Event)
    UnityEngine.IMGUIModule.dll!UnityEngine::GUIUtility.ProcessEvent()
    EditorLoop
    Main Thread
Non matching Profiler.EndSample (BeginSample and EndSample count must match): UnityEngine.UIElementsModule.dll!UnityEngine.UIElements::BaseVisualElementPanel.SendEvent()
Previous 5 samples:
    GC.Alloc
    UnityEditor.dll!UnityEditor::SceneVisibilityState.GeneratePersistentDataForAllLoadedScenes()
    Mono.JIT
    GC.Alloc
    UnityEditor.dll!::AssetStoreClientInternal.IsAnyDownloadInProgress()
In the scope:
    UIElementsUtility.DoDispatch(Non Repaint Event)
    UnityEngine.IMGUIModule.dll!UnityEngine::GUIUtility.ProcessEvent()
    EditorLoop
    Main Thread
Non matching Profiler.EndSample (BeginSample and EndSample count must match): UnityEngine.UIElementsModule.dll!UnityEngine.UIElements::UIElementsUtility.DoDispatch()
Previous 5 samples:
    GC.Alloc
    UnityEditor.dll!UnityEditor::SceneVisibilityState.GeneratePersistentDataForAllLoadedScenes()
    Mono.JIT
    GC.Alloc
    UnityEditor.dll!::AssetStoreClientInternal.IsAnyDownloadInProgress()
In the scope:
    UnityEngine.IMGUIModule.dll!UnityEngine::GUIUtility.ProcessEvent()
    EditorLoop
    Main Thread
Non matching Profiler.EndSample (BeginSample and EndSample count must match): UnityEngine.UIElementsModule.dll!UnityEngine.UIElements::UIElementsUtility.ProcessEvent()
Previous 5 samples:
    GC.Alloc
    UnityEditor.dll!UnityEditor::SceneVisibilityState.GeneratePersistentDataForAllLoadedScenes()
    Mono.JIT
    GC.Alloc
    UnityEditor.dll!::AssetStoreClientInternal.IsAnyDownloadInProgress()
In the scope:
    UnityEngine.IMGUIModule.dll!UnityEngine::GUIUtility.ProcessEvent()
    EditorLoop
    Main Thread
Non matching Profiler.EndSample (BeginSample and EndSample count must match): UnityEngine.IMGUIModule.dll!UnityEngine::GUIUtility.ProcessEvent()
Previous 5 samples:
    GC.Alloc
    UnityEditor.dll!UnityEditor::SceneVisibilityState.GeneratePersistentDataForAllLoadedScenes()
    Mono.JIT
    GC.Alloc
    UnityEditor.dll!::AssetStoreClientInternal.IsAnyDownloadInProgress()
In the scope:
    EditorLoop
    Main Thread

Reproduce

Create new 3D project
Open Profiler
Enable “Editor” and “Deep Profile”
Press Start

Actual
Observe Unity outputs several “Non matching Profiler.EndSample” errors.

alexeyzakharov · December 9, 2019, 1:04pm

Hi Peter,
Thank you for reporting the issue!
I happen to fix very similar issue recently Unity Issue Tracker - Missing Profiler.EndSample error when profiling the Editor and switching between the Profiler window and the Scene View which was related to mismatching begin/end due to exception being thrown in the UI (GUIUtility.ExitGUI() throws an exception).
Although, the fix landed quite a while ago (2019.3b3) and supposedly should not be present in 2019.3.0f1.
There is potentially some other unfixed issue, however, I can’t reproduce it with the latest 2019.3.0f3 and repro steps you described.

To clarify

Create new 3D project
did you mean the default 3D template when creating a new project?

Peter77 · December 9, 2019, 1:24pm

In Unity HUB the tile is just labled “3D”, that’s the project I used to create.

alexeyzakharov · December 9, 2019, 1:48pm

Thanks - I’ve created a bug on your behalf for the verification.

DDainys · December 10, 2019, 3:11pm

Hello Peter,

Thank you for taking the time to report this incident, and I hope you are having a good day. My name is Dovydas, and I will be helping you.

Sadly I wasn’t able to reproduce the incident. Does the issue reproduce with other project templates? Are you using a custom Editor layout or the default one?

Any and all information would be greatly appreciated!
If you have any questions, feel free to ask.

Sincerely,
Dovydas Dainys
Customer QA Team

Peter77 · December 10, 2019, 4:29pm

Hello Dovydas,

thank you for the reply.

I’ve tried to reproduce the issue, but it does not reproduce anymore. I’ll keep an eye open.

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Deep profiling causes "Non matching Profiler.EndSample"

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