| μC/OS-II实时系统任务调度优化 |
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| 引用本文： | 徐 亮,徐中伟.μC/OS-II实时系统任务调度优化[J].计算机工程,2007,33(19):57-59. |
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| 作者姓名： | 徐 亮 徐中伟 |
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| 作者单位： | 同济大学电子与信息学院 上海200331 |
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| 摘 要： | 使用实时内核时，优先级的反转问题是实时系统中出现得最多的问题。为了解决这一问题，操作系统必须动态地提升获得资源的任务的优先级。该文分析了μC/OS-II的任务调度机制，提出了一种基于优先级继承提升的策略用以解决优先级的反转问题，从而优化了实时操作系统的任务调度，增强了其对高优先级任务调度的实时性。
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| 关 键 词： | 实时任务 优先级反转 调度 信号量 优先级继承提升 |
| 文章编号： | 1000-3428（2007）19-0057-03 |
| 修稿时间： | 2006-11-25 |
Improvement on μC/OS-II Real-time System Task Scheduling |
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| XU Liang,XU Zhong-wei.Improvement on μC/OS-II Real-time System Task Scheduling[J].Computer Engineering,2007,33(19):57-59. |
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| Authors: | XU Liang XU Zhong-wei |
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| Affiliation: | College of Electronics and Information,Tongji University,Shanghai 200331 |
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| Abstract: | Priority inversion is the most common problem occurring in real-time system when using a real-time kernel. In order to solve the problem, the operation system must dynamically hoist the task priority which occupies the resource. This paper analyses the task scheduling principle of μC/OS-II, and then proposes a method based on the priority inheritance and hoist, which solves the problem. It improves the task scheduling of the real-time system and strengthens its real-time performance for the high-priority task. |
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| Keywords: | real-time task priority inversion scheduling semaphore priority inheritance and hoist |
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