RTOS Archives - Embedded Artistry

Cooperative Scheduling

Cooperative scheduling is a style of scheduling in which the OS never interrupts a running process to initiate a context switch from one process to another. Processes must voluntarily yield control periodically or when logically blocked on a resource.

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Preemptive Scheduling

Preemptive Scheduling is a multitasking strategy which permits the preemption of tasks. Preemption is the act of interrupting a task currently running on the CPU, usually to execute a higher-priority task, with the intention of resuming the interrupted task at a later time.

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Time Slicing

Time Slicing is an RTOS scheduling method that distributes CPU cycles to multiple threads in a weighted manner.

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Round-Robin Scheduling

Round-Robin Scheduling is a method used by an RTOS to run threads in a circular fashion, letting each thread run until it becomes “blocked,” or relinquishes its turn.

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Context Switch

A context switch is the process of storing the state of a process, thread, or processor operating mode so that it can be restored at a later point to resume execution.

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Priority Inversion

Priority inversion is a scenario in scheduling in which a high priority task is indirectly preempted by a lower priority task effectively inverting the relative priorities of the two tasks.

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Priority Inheritance

Priority Inheritance is a mechanism employed by an RTOS to prevent deadlock in a case of priority inversion.

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