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中国科学院大学学报 ›› 2010, Vol. 27 ›› Issue (3): 404-413.DOI: 10.7523/j.issn.2095-6134.2010.3.015

• 论文 • 上一篇    下一篇

分时系统最佳节能频率及其实现方法

毛熠璐, 陈香兰, 唐玲, 吴昊, 龚育昌   

  1. 中国科学技术大学计算机科学与技术学院,合肥 230027;中国科学技术大学苏州研究生院,苏州 215123; 华东政法大学刑事司法学院,上海 201620
  • 收稿日期:2009-09-08 修回日期:2009-12-22 发布日期:2010-05-15
  • 通讯作者: 陈香兰
  • 基金资助:

    国家"863"高技术研究发展计划课题(2008AA01Z101)、国家自然科学基金(60873221)、安徽省自然科学基金(070412030)、安徽省教育厅自然科学重点项目(KJ2008A103)和上海市优秀青年教师科研专项基金(hzf-07013)资助 通信联系人

Best energy-saving frequency in time-sharing system and its realization

MAO Yi-Lu, CHEN Xiang-Lan, TANG Ling, WU Hao, GONG Yu-Chang   

  1. School of Computer Science and Technology, University of Science and Technology of China, Hefei 230027, China; Suzhou Institute for Advanced Study, University of Science and Technology of China, Suzhou 215123, China; Criminal Justice School, East China University of Political Science and Law, Shanghai 201620, China
  • Received:2009-09-08 Revised:2009-12-22 Published:2010-05-15

摘要:

针对分时操作系统,依据任务执行时间提出系统性能损失作为性能参数,定义最佳节能条件并推出最佳节能频率的计算公式;进而重点论述为实现分时操作系统中的频率管理模块,在系统频率为离散值的前提下,如何对最佳节能频率进行有效近似;最后利用实现了频率管理模块的Linux,实验验证了最佳节能频率以及对其实现的正确性和有效性,而所增加的系统开销仅为3.63%.

关键词: 分时操作系统, 动态调频技术, 低能耗, 最佳节能频率

Abstract:

The problem of power and energy consumption is becoming increasingly important in computer systems, and this paper discusses this problem in time-sharing operating systems. We first give a formula to compute the best energy-saving frequency, which is deduced using the best energy-saving condition defined based on our description of system performance and energy. Because of the discrete nature of system frequencies, an algorithm is then proposed to approximate the best energy-saving frequency. We have implemented the proposed approach as a frequency management module in Linux, and experimental results show its correctness, efficiency, and practicability with an extremely low overhead of less than 3.63%.

Key words: time-sharing operating system, dynamic voltage and frequency scaling, low energy consumption, most energy-efficient frequency

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