| 软实时系统下动态电压/频率调节算法设计 |
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| 引用本文： | 钟伟军,刘明业. 软实时系统下动态电压/频率调节算法设计[J]. 北京理工大学学报, 2005, 25(10): 868-871 |
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| 作者姓名： | 钟伟军 刘明业 |
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| 作者单位： | 北京理工大学,信息科学技术学院计算机科学工程系,北京,100081;北京理工大学,信息科学技术学院计算机科学工程系,北京,100081 |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | 基于实时DVFS模型,提出满足软实时性约束的DVFS算法SRT-DVFS.该算法利用软实时系统在给定延迟率下允许任务延迟的特点,在 EDF算法基础上实现软实时DVFS调度,克服了在软实时系统里直接使用硬实时DVFS算法效率低的缺点.通过模拟实验证明该算法能够满足系统软实时要求.实验结果表明,该算法比LEDF算法节省10%的能量消耗.
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| 关 键 词： | 嵌入式系统 软实时 动态电压/频率调节 |
| 文章编号： | 1001-0645(2005)10-0868-04 |
| 收稿时间： | 2004-11-23 |
| 修稿时间： | 2004-11-23 |
Design of DVFS Algorithm in Soft Real-Time Systems |
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| ZHONG Wei-jun and LIU Ming-ye. Design of DVFS Algorithm in Soft Real-Time Systems[J]. Journal of Beijing Institute of Technology(Natural Science Edition), 2005, 25(10): 868-871 |
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| Authors: | ZHONG Wei-jun and LIU Ming-ye |
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| Affiliation: | Department of Computer Science and Engineering, School of Information Science and Technology, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | A new DVFS algorithm meeting the constraints of soft real-time is proposed,based on the real-time DVFS model.Based on EDF algorithm,DVFS scheduling for soft real-time is implemented by taking advantage of features that task delay is accepted when predefined delay ratio is satisfied in the soft real-time system.Shortcoming of low-efficiency caused by the use of hard-time DVFS algorithms in soft real-time system is thus avoided.It is shown that the algorithm can satisfy with the requirements of soft real-time through simulation experiment.Experimental results have shown that SRT-DVFS saves 10% in energy consumption compared to LEDF. |
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| Keywords: | embedded system soft real-time dynamic voltage/frequency scaling |
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