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AvaloniaUI / Avalonia

Develop Desktop, Embedded, Mobile and WebAssembly apps with C# and XAML. The most popular .NET UI client technology
https://avaloniaui.net
MIT License
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[Metal] [MacOS] [NativeAOT] [x64] Metal backend is unstable on macOS x64 NativeAOT trimmed build #14829

Closed Mikolaytis closed 5 months ago

Mikolaytis commented 6 months ago

Disclaimer

I know that metal backend is not stable, experimental, and not production ready. I don't require any fix for this. This issue is just a report to anyone who will get stuck in the same shit and will find this report with a workaround.

Describe the bug

We've recently moved to NativeAOT. Almost all things are perfect except receiving tons of feedback from our users that app is hanging after 30-60 seconds of work on macOS x64 machines.

Debugging this was a nightmare, because we did not have x64 mac, and debugging should be performed only after nativeAOT publish. After some days of work we know for 95% accuracy - disabling metal backend resolves the issue.

Analyzing callstacks on hang actually did not provide us any useful information. Founding that metal is the issue - was pure luck, because previously it worked awesome in the all scenarios for our app.

To Reproduce

Steps to reproduce the behavior: Publish nativeAOT app into osx-x64 arch with metal backend enabled and run it on it for some time.

Temporary fix

Disable metal backend for x64 arch on macOS only

maxkatz6 commented 6 months ago

So, it cannot be reproduced on silicon m1 macOS with nativeAOT and metal? Just to confirm that it's not a trimming issue, since we use some reflection (that should be safe) to call some APIs.

Mikolaytis commented 6 months ago

yes, arm/m1 - works fine with nativeaot + trimming and metal.

kekekeks commented 6 months ago

Since we are multitargeting .NET 8 now, we can probably use UnsafeAccessor instead of that reflection piece when targeting net8.0+

kekekeks commented 6 months ago

But I doubt that it's a trimming issue, since the app works for 30 seconds before freezing

Mikolaytis commented 5 months ago

After deep user testing we've found that issue is not caused by metal. Looks like it's a nativeAOT related issue only on x64 macos build. Not a trimming issue, because all works without nativeAOT and with trimming enabled.