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The Apple GPU and Metal driver: unified memory in practice
How macOS's GPU driver hands off work to Apple Silicon's tile-based deferred renderer, and why unified memory makes IOSurface zero-copy across CPU and GPU.
apple-silicongpumetaliokit
The Apple GPU command pipeline: Metal to silicon
From a MTLCommandBuffer.commit call to the shader cores running — the userspace encoder, the kernel driver's IOConnectCallMethod, the GPU firmware processor, and where commands actually dispatch.
apple-silicongpumetaliokit
IOSurface in depth: zero-copy between every coprocessor
The IOKit object that lets CPU, GPU, ANE, ISP, and media engines share the same physical pages. The unifying primitive behind unified memory's performance story.
iokitiosurfacegpumetal