Abstract: In the development of real-time operating systems, Priority Inversion is a classic problem that cannot be ignored. This article uses the lightweight kernel dumyOS to illustrate the causes of priority inversion through examples, introduces commonly used solutions in the industry (such as priority inheritance and priority ceiling protocols), and finally provides implementation points based … Read more
In embedded systems, concurrent access to shared resources by multiple tasks is a common challenge. Without proper synchronization mechanisms, issues such as data inconsistency and deadlocks can lead to system crashes.Mutex (Mutual Exclusion) provides an effective way to address this issue, ensuring that only one task can access shared resources at any given time. Today, … Read more
Have you ever wondered why your HarmonyOS device can do so many things at once? You can receive calls while gaming, and reply to messages while watching videos. The secret behind this is the task scheduling mechanism. This “traffic control system” determines who goes first and who goes later, directly affecting user experience! What is … Read more