Lock-free: Scaling Up

This article provides an in-depth analysis of lock-free algorithms in high-load systems. The author critiques the use of standard mutexes, which under heavy load cause OS scheduler issues and excessive context switching. Instead, the concept of an 'algorithm that becomes cheaper under load' is explored using the wxl library as a case study. The material details basic CPU instructions, methods for preventing the ABA problem via extended release sequences, and lazy trigger mechanisms for optimizing thread wake-ups. The primary goal is to create efficient data transmission channels between cores without involving the operating system. This article is useful for developers aiming to minimize latency and improve the performance of multi-threaded applications by replacing locks with low-level synchronization primitives.