iOS kernel overview!

I need an overview of the iOS architecture (Process management, system memory management, kernel) (just开发者_如何学运维 an overview).

iOS is very similar to Mac OS X at the kernel level. The major differences would revolve around sandboxing, application privileges, etc. If you're curious about stuff that isn't necessarily iOS-specific, the Kernel Programming Guide provides an overview for a lot of Mach and BSD concepts, like the virtual memory system, how thread scheduling works, etc.