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Study of priority inversion in embedded RTOS

Ping Li

Abstract

Aiming at the characteristics of the task scheduling in embedded real-time system that the task may be cut off by task with higher priority grade while running,this paper analyzed the searching algorithm of the most priority ready task in embedded RTOS,and pointed out that in the algorithm exists priority inversion of(different) priority tasks.The paper provided priority inheritance for solving the problem of priority inversion in task scheduling.

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Available abstract

Key concepts: Priority inversion, Priority inheritance, Priority ceiling protocol, Computer science, Real-time operating system, Deadline-monotonic scheduling, Earliest deadline first scheduling, Inversion (geology)