| 一种基于Linux系统改进实时性的研究 |
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| 引用本文： | 耿庆田,张晶,姜南.一种基于Linux系统改进实时性的研究[J].长春师范学院学报,2013(6):27-30,11. |
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| 作者姓名： | 耿庆田 张晶 姜南 |
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| 作者单位： | [1]长春师范大学计算机科学与技术学院,吉林长春130033 [2]吉林大学计算机科学与技术学院,吉林长春130012 [3]长春市宽城区综合实践教育基地校,吉林长春130051 |
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| 基金项目： | 吉林省教育厅“十一五”科学技术研究项目（2010148）;长春师范学院自然科学基金项目（2010003）. |
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| 摘 要： | 针对Linux在实时性的先天缺陷，本文通过对Linux系统实时性不强原因的分析，提出采用动态优先权调度算法及单次触发方式对其实时性能进行改进，利用回馈和设定阈值法解决系统中进程调换频率过高致使实时性能下降问题。采用单次触发方式实现对系统的时钟粒度细化。实验测试结果表明，改进后Linux实时性得到提高，达到了预想效果。
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| 关 键 词： | Linux内核 实时性能 进程调度 时钟粒度 |
A Study of the Improvement of the Linux Real - timePerformance |
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| GENG Qing-tian,ZHANG Jing,JIANG Nan.A Study of the Improvement of the Linux Real - timePerformance[J].Journal of Changchun Teachers College,2013(6):27-30,11. |
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| Authors: | GENG Qing-tian ZHANG Jing JIANG Nan |
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| Institution: | 1. Department of Computer Science and Technology, Changchun Normal University, Changchun Jilin 130032, China; 2. Department of Computer Science and Technology, Jilin University, Changchun Jilin 130012, China; 3. Kuaneheng Comprehensive Practical Education School, Changchun Jilin 130051 ,China) |
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| Abstract: | As for the birth defects of Linux in real time, this article analyzes the causes of＂ its weak real - time performance and puts forward a dynamic priority scheduling algorithm and a single trigger mode to improve its real - time performance. Feedback and setting threshold value method are used to solve the problem of real - time performance degradation due to the high switching frequency in the process. Single trigger mode was adopted to realize the system clock size refinement. Test results show that the improved Linux realtime performance can achieve the expected effect. |
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| Keywords: | Linux kernel real - timeperformanee process scheduling Time granularity |
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