Hello,
Shaders in our application is written using HLSL and we rely on Metal Shader Converter to convert DXIL to Metal IR. We ran into an issue that causes metal pipeline state creation to fail when vertex stage-in function is used on AMD GPUs.
Here's the error reported by Metal in Xcode output:
Compiler failed with XPC_ERROR_CONNECTION_INTERRUPTED
XPC_ERROR_CONNECTION_INTERRUPTED
MTLCompiler: Compilation failed with XPC_ERROR_CONNECTION_INTERRUPTED on 4 try. This error suggests an unexpected interruption in the connection. Possible reasons: a crash in the compiler service, termination by the OS due to resource constraints (e.g., jetsam), a timeout in the service, or an issue with IPC. Verify system stability and check the logs for more details.
Compiler failed with XPC_ERROR_CONNECTION_INVALID
XPC_ERROR_CONNECTION_INVALID
MTLCompiler: Compiler encountered XPC_ERROR_CONNECTION_INVALID: failed to check-in, peer may have been unloaded: mach_error=10000003 (is the OS shutting down or process jetsammed?)
Compilation failed due to an interrupted connection: XPC_ERROR_CONNECTION_INTERRUPTED. This error occurred after multiple retries.
which seems to indicate a internal compiler error.
I have a minimal repro here: https://github.com/kcloudy0717/metal_pso_fail/tree/main, simply follow the instructions in README.
Hello,
Pre documentation "Metal libraries built using Metal shader converter tools require a device that supports Argument Buffers Tier 2, running macOS 14 Sonoma, iOS 17 or later. If you build a Metal library for earlier OS versions, not all features will be supported."
AMD GPUs lack many of the features offered by Apple Silicon and consequently PSOs won't compile (irrespective of Metal Shader Converter).
Check the Metal Feature Set Tables for details.
