分时系统最佳节能频率及其实现方法  

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

作　　者：毛熠璐[1,2,3] 陈香兰[1,2,3] 唐玲[1,2,3] 吴昊[1,2,3] 龚育昌[1,2,3] 

机构地区：[1]中国科学技术大学计算机科学与技术学院,合肥230027 [2]中国科学技术大学苏州研究生院,苏州215123 [3]华东政法大学刑事司法学院,上海201620

出　　处：《中国科学院研究生院学报》2010年第3期404-413,共10页Journal of the Graduate School of the Chinese Academy of Sciences

基　　金：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);上海市优秀青年教师科研专项基金(hzf-07013)资助

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%.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%.

关 键 词：分时操作系统 动态调频技术 低能耗 最佳节能频率 

分 类 号：TP316.1[自动化与计算机技术—计算机软件与理论]