Embedded Systems Architecture

Real-time scheduling

One of the key requirements for real-time operating systems is the ability to react to a selected number of events by executing the associated code within a short and predictable amount of time. In order to implement features with strict timing requirements, the operating system must focus on quick interrupt handling and dispatching, rather than other metrics, such as throughput or fairness. Each task might have specific requirements, such as deadlines, indicating the exact time when the execution must start or stop, or related to shared resources that might introduce dependencies to other tasks in the system. A system that can execute tasks with a deterministic time requirement must be able to meet the deadlines within ...