In-Depth Analysis of Linux Lock Mechanisms: From Principles to Practice 1 Overview of Linux Lock Mechanisms In the field of concurrent programming, lock mechanisms are the cornerstone technology for ensuring data consistency and operation atomicity in multi-threaded and multi-tasking environments. As a complex modern operating system, Linux needs to manage resource sharing issues in multi-processor … Read more
Click the card below to follow Arm Technology Academy This article is selected from the “Arm Selection” column of Jishu, authorized to be reprinted from the WeChat public account Arm Selection. The author is ctw, who believes that code changes the world. This article will guide you through the knowledge related to the exclusive mechanism. … Read more
Author | baron Source | Arm Selected Note: Although this article uses the spinlock function as an example, it does not provide an in-depth analysis of the spinlock function. The focus of this article is on the exclusive mechanism. Basic Knowledge Each core has an Internal Exclusive Monitor, which has open and exclusive states, managing: … Read more
Note: Although this article uses the spinlock function as an example, it will not delve deeply into the spinlock function. The focus of this article is on the exclusive mechanism. Basic Knowledge Each core has an Internal Exclusive Monitor, which has open and exclusive states, managing: Load-Exclusive accesses, Store-Exclusive accesses, and Clear-Exclusive (CLREX) instructions. Load-Exclusive … Read more
The previous article introduced a read-write lock implementation scheme where writers are not starved by readers who come later, ensuring fairness for writers competing for the lock with readers. This article introduces a special type of read-write spinlock that guarantees the highest priority for write operations. Specifically, when there is only one writer, meaning there … Read more
When implementing locks, it is necessary to ensure the memory order semantics of the lock: generally, an acquire memory order is required when acquiring the lock, and a release memory order is required when releasing the lock. This acquire-release semantics guarantees that memory read and write operations in the critical section do not get reordered … Read more
Implementation Methods of Thread Synchronization Mechanisms in C Language In multithreaded programming, synchronization between threads is an important issue. When multiple threads access shared resources simultaneously, the absence of appropriate synchronization mechanisms can lead to data inconsistency or program crashes. This article will introduce several common thread synchronization mechanisms in C language, including mutexes, condition … Read more