Question 4x memory usage in Xcode GPU Frame Capture

joshuacwilde · Sep 28, 2020

AcidArrow said: ↑

How is this different than : https://forum.unity.com/threads/ios-12-large-memory-usage.558550/page-4#post-4271797 ?
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There is a big difference between these two issues because the one I am reporting only happens in Unity. It does not happen when I tested the same thing in SpriteKit with texture memory usage.

chrismarch · Oct 10, 2020

joshuacwilde said: ↑

I created a test project in SpriteKit using the exact same texture. I couldn't get mip maps to work in SpriteKit, but what you are seeing in the attached image is a frame capture of that project using the same texture as the one in Unity.

Compare/Contrast:

Unity:
* 64x64 texture with mip maps - 128 KB in Xcode GPU Frame Capture
* 64x64 texture without mip maps - 128 KB in Xcode GPU Frame Capture

SpriteKit:
64x64 texture without mip maps - 16 KB in Xcode GPU Frame Capture

The SpriteKit readings here add up as 64*64*4 is 16384 bytes, aka 16 KB (assuming 4 bytes per pixel)
Unity is allocating 8 times as much memory as required in the case of the texture without mip maps.

It is becoming more and more obvious to me there are some bugs with GPU memory management in Unity on iOS. And it isn't an OS problem because it works fine with SpriteKit as shown above.

Can someone please look further into this? This is a major problem and is 100% reproducible with even the most basic of Unity projects. I linked the test project above, and I can link a SpriteKit project as well if desired. I am really surprised a bug this severe is so overlooked. This bug is causing us big problems and is hurting our ability to release on time.
Click to expand...

Is your Unity 64x64 texture without mip maps - 128 KB in Xcode GPU Frame Capture when dynamic resolution is disabled?

Alterego-Games · Dec 3, 2020

Because this topic has 2 actual bugs in them, seperated from the changes to how ios shows (and limits) memory usage

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Question 4x memory usage in Xcode GPU Frame Capture

joshuacwilde

chrismarch

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