CPU频率对电池的影响以及对动态调压算法的改进  

Influence of CPU Frequency upon Battery and Improvement of Dynamic Voltage Scaling Algorithms

作　　者：吴刚[1] 唐志强[1] 李文荣[2] 涂时亮[1] 

机构地区：[1]复旦大学计算机科学与工程系,上海200433 [2]复旦大学化学系,上海200433

出　　处：《小型微型计算机系统》2006年第11期2086-2089,共4页Journal of Chinese Computer Systems

摘　　要：对电池供电的嵌入式系统来说,电池工作时间是重要的指标.利用动态调压算法对CPU频率进行调度,可以延长电池工作时间.然而,目前尚没有通用的方法对CPU频率和电池之间的关系进行深入研究,这导致动态调压算法不能最大限度地延长电池工作时间.本文提出一种新方法来研究CPU频率对电池的影响,其结论具有通用性,并得到实验的验证.利用这个结论,本文对动态调压算法进行了优化,使之更适于电池供电系统.Long battery lifetime is an important target of battery-powered embedded systems. Kinds of DVS （Digital Voltage Scaling） algorithms can be used to prolong battery lifetime. Unfortunately, there is still no universal way to analyze the influence of CPU frequency upon battery, and known DVS algorithms are not flawless. A new way is presented in this paper to analyze the influence, whose conclusion is universal and verified by experiments. The conclusion is applied to a DVS algorithm to make it more suitable for battery-powered systems.

关 键 词：嵌入式系统 低功耗 动态调压 电池 

分 类 号：TP333[自动化与计算机技术—计算机系统结构]