From the course: IoT Foundations: Operating Systems Fundamentals
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Task scheduler
From the course: IoT Foundations: Operating Systems Fundamentals
Task scheduler
- [Instructor] We know that the way of allowing multiple tasks to run is based on CPU time sharing. However, we didn't talk about how the tasks are running at each time slot. This is the responsibility of a task scheduler which is part of an OS kernel. How the next task can run and how much time they can take are determined by your task scheduler. Every task scheduler is based on a task scheduling algorithm also known as process scheduling algorithm. A task scheduler can be based on the two kinds of task scheduling algorithms, preemptive and non-preemptive. Preemptive task scheduling can preempt the current running task to allow another task to run. Conversely, non-preemptive task scheduling does not preempt the current running tasks as it allows a task to complete before the other tasks get a CPU time share to run. A real-time OS usually uses the preemptive task scheduling algorithms for its task scheduler. Let's look at the typical preemptive scheduling algorithm called the…
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