Memory Consistency II

This lecture delves into speculative memory consistency, covering topics such as speculative ordering, end-to-end sequential consistency, and the debate between always order and relaxed order. It explores the challenges of mixed accesses and stack location reuse, as well as solutions like static and dynamic classifiers. The lecture also discusses the performance overhead of SC hardware, the evolution of SC systems, and the concept of atomic sequence ordering (ASO). Furthermore, it introduces concepts like InvisiFence hardware and its impact on strong ordering performance, emphasizing the importance of dynamic fence enforcement for achieving high performance without static compile-time fences.