Timers are fundamental to real-time systems and virtually all real-time kernels implement some form of timer management so that tasks can pause, issue time-outs, and the like. This article presents some basic ways in which timers can be managed. This article has only touched the surface concerning this subject as there are many ways in which timer management can be effected, and many other areas for discussion (e.g., the system impact of many pending timers expiring all at once, etc.).
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