ARMv8/ARMv9 Memory Barrier Mechanism (Observer & Barrier)

ARMv8/ARMv9 Memory Barrier Mechanism (Observer & Barrier)

ver0.3 Introduction Those who have persisted in reading this article are already remarkable, as they now understand the weak memory ordering architecture of ARM. You not only understand the types of memory, the memory sharing mechanisms, and the memory consistency mechanisms, but also the CPU architecture and the microarchitecture of processors, all of which lay … Read more

The Theory of Linux Memory Barriers and Five Practical Applications (Based on ARM64)

The Theory of Linux Memory Barriers and Five Practical Applications (Based on ARM64)

There is a saying in the community: “Cherish life, stay away from barriers,” which sufficiently illustrates that memory barriers are quite obscure and difficult to grasp accurately. Using too weak a barrier can lead to software instability, while using too strong a barrier can cause performance issues. Therefore, in engineering, the goal is to pursue … Read more