> If you have complete control over the whole stack, sure. But we are taking windows user space applications. Well, hardware feature is a hardware feature. Loa

> If you have complete control over the whole stack, sure. But we are taking windows user space applications. Well, hardware feature is a hardware feature. Load/store ordering is a hardware feature. Operating system, user space or kernel space, compiler, etc. are not relevant when discussing about CPU core hardware operation. You don't need complete control of the stack. You just need to have CPU cores executing instructions on multiple cores.