实时操作系统中优先级反转问题研究及一种新的解决方法
Study of priority inversion problem in real-time operating system and a new solution
实时系统中多采用基于优先级调度的策略。在该任务调度策略下，当多任务共享资源时容易出现优先级反转现象。此现象的出现不仅会降低系统的实时性，也会改变任务的运行顺序，进而有可能产生很多难以预料的错误结果。提出了一种新的任务调度方法，该方法能有效抑制优先级反转现象的发生，并保证任务调度的正确性。
Preemptive priority policy is widely adopted in the real-time systems. The priority inversion phenomenon may happen easily when the limit resource is shared by multiple tasks. This phenomenon will not only reduce the system’s performance, but also effect on the sequence of the tasks. In this condition, the result may be wrong or other kinds of unforeseeable mistakes occur. A new policy is presented. This policy can restrain the priority inversion phenomenon, and guarantee the exactly scheduling of the tasks
潘琢金、宋刚
计算技术、计算机技术
实时系统优先级反转实时性
real-time systempriority inversionreal-time
潘琢金,宋刚.实时操作系统中优先级反转问题研究及一种新的解决方法[EB/OL].(2009-01-20)[2025-08-03].http://www.paper.edu.cn/releasepaper/content/200901-930.点此复制
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