[AssetBundles][AUP][Textures] JobTempAlloc has allocations that are more than 4 frames old

Hi everyone,

Using Unity 2019.2, I encounter a problem loading (at runtime) an AssetBundle containing a 3D model with a texture with crunch compression (50%).

Every time I load this 3D model at runtime from the asset bundle, I get this message :

JobTempAlloc has allocations that are more than 4 frames old..

To Debug, enable the define: TLA_DEBUG_STACK_LEAK in ThreadsafeLinearAllocator.cpp. This will output the callstacks of the leaked allocations

Internal: deleting an allocation that is older than its permitted lifetime of 4 frames (age = 6)

How to reproduce :
-> Create an asset bundle with a 3D model (a simple cube is enough) having a very large texture (+10mb uncompressed, 8K texture, like the one I attached) and use crunch compression at 50%. For the bundle, juste use uncompressed or LZMA settings.
-> Load the model and place it in the scene with LoadAssetAsync with the following code

Code (CSharp):

1. public class TestAssetLoad : MonoBehaviour
2. {
3.     public string path = "/path/cube";
4.  
5.     void Update()
6.     {
7.         if (Input.GetKeyDown(KeyCode.K))
8.             StartCoroutine(LoadAsset());
9.     }
10.  
11.     public IEnumerator LoadAsset()
12.     {
13.         AssetBundleCreateRequest bundleLoadRequest = AssetBundle.LoadFromFileAsync(path);
14.         yield return bundleLoadRequest;
15.  
16.         AssetBundle Bundle = bundleLoadRequest.assetBundle;
17.  
18.         if (Bundle == null)
19.         {
20.             Debug.Log("Failed to load AssetBundle!");
21.             yield break;
22.         }
23.  
24.         AssetBundleRequest assetLoadRequest = Bundle.LoadAssetAsync<GameObject>("cube");
25.         yield return assetLoadRequest;
26.  
27.         GameObject prefab = assetLoadRequest.asset as GameObject;
28.         Instantiate(prefab);
29.     }
30. }

You should see the message. I think this warning is due to the processing of the texture which is done with AUP (Async Upload Pipeline) on jobs that last more than 4 frames (due to the size of the texture), because it would not show up if crunch compression is not activated.

Any idea ? Is it a bug to be fixed for large textures ?

 

Up the issue also occurs in 2019.3

 

Sounds like the UAP per frame time slice is not enough to load that texture in less that 4 frames. Did you try increasing the time slice value? Also, are you setting the async upload buffer size to accommodate such large texture beforehand?

 

I set up the async values at their maximum but I'm still getting the issue... Any more ideas ?

 

I encountered similar issue.
unity2019.3.10f1 HDRP Addressable1.8.3
I loaded an assetbundle that contains huge scene with lots of textures.
In most case, a build freezed!!!

I seted async upload buffer size 4 (mb)
Async upload time slice 33(ms)
These settings solved this problem.
But I think that this is a bug.

 

Thanks @masak. I had the same problem on a very similar setup to yours which includes Addressables package, too. I could finally solve the problem after playing with those settings.

For those having a similar problem, you can read more on the following links.

https://blogs.unity3d.com/2018/10/0...ance-understanding-the-async-upload-pipeline/

https://docs.unity3d.com/ScriptReference/QualitySettings.html

 

I found that if you limit the framerate cap to something low in the loading screens then this error goes away
Application.targetFrameRate = 30;

 

Unity2019.4.0f1 solved the freeze bug. (( Editor shows lots of warning as usual

 

2019.4.3f1 showed the freeze bug in some environment...
This bug appeared in issue tracker.
plz vote
https://issuetracker.unity3d.com/is...ync-which-has-more-than-40-texture-references

 

Hi @masak
Could you please explain what do you mean saying "freeze bug"?

We came accross some loading issue. For some devices the loading progress doesn't go more than 95% and stays there forever.
Is your case the same?

 

Freeze bug means that app window does not react, and if i click it, windows says that this application is not responding...
If you click your app after 95% and windows says nothing, I think different case.