| 提高实时内核对实时任务响应时间的新方法 |
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| 引用本文： | 郑晓曦,张虎,鲍松堂.提高实时内核对实时任务响应时间的新方法[J].计算机工程与应用,2009,45(16):90-92. |
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| 作者姓名： | 郑晓曦 张虎 鲍松堂 |
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| 作者单位： | 五邑大学 信息学院，广东 江门 529020 |
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| 摘 要： | 提出了一种延迟锁方法，以减小实时内核对周期性实时任务的响应时间。该技术的基本策略为：只让那些不影响实时任务的非实时任务进入非抢占临界区。为实现该策略，引入了定时器中断预测和锁持有时间的概念。此外，还设计了一种用于该策略的紧急定时器。最后将该策略原型在Linux2.6内核中实施，实验结果显示，在最差的情况下，Linux对实时任务的响应时间比原来降低了23％，同时，对非实时任务的响应时间比原来增加20％。
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| 关 键 词： | 延迟锁 自旋锁 实时Linux 响应时间 |
| 收稿时间： | 2008-4-7 |
| 修稿时间： | 2008-9-5
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New method of reducing real-time kernel latency for real-time task |
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| ZHENG Xiao-xi,ZHANG Hu,BAO Song-tang.New method of reducing real-time kernel latency for real-time task[J].Computer Engineering and Applications,2009,45(16):90-92. |
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| Authors: | ZHENG Xiao-xi ZHANG Hu BAO Song-tang |
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| Affiliation: | Department of Information，Wuyi University，Jiangmen，Guangdong 529020，China |
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| Abstract: | A new method called delayed lock is proposed,to reduce the latency of real-time task in real-time kernel.The basic rule of this method is that a non-real-time task entering a critical section is allowed only if the operation does not disturb the future execution of the real-time application.To execute this rule,this paper introduced the concepts of timer interrupt prediction and lock hold time.In addition,the paper also designed and implemented a new urgent timer for this technique,and the prototype on Linu... |
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| Keywords: | delayed lock spin-lock real-time Linux latency |
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