面向国产UniCore的安卓系统动态变频低功耗策略  

Low Power Strategy for Dynamic Frequency Scaling of Android System Based on Domestic UniCore

作　　者：姜仲秋[1] 刘长荣[1] 张跃[2] 郑屹帆 

机构地区：[1]淮安信息职业技术学院,江苏淮安213003 [2]东南大学国家ASIC中心,南京210096 [3]摩托罗拉移动技术(中国)有限公司南京分公司,南京211102

出　　处：《微电子学》2013年第3期413-418,共6页Microelectronics

基　　金：国家科技重大专项(2009ZX01031-001-004-3);江苏省科技型企业创新资金项目(BC2009207)

摘　　要：基于自主设计的国产UniCore嵌入式平台,分析了安卓电源管理和软件层面的动态变频低功耗技术。在此基础上,提出一种动态变频架构,设计实现了动态时钟供给、动态变频的内核层和驱动层,并对传统的动态变频策略进行改进,使其能够适应不同的应用环境。给出了LCD背光调整、单个设备休眠/唤醒等其他系统运行态低功耗技术。实验结果表明,采用功耗管理技术,系统极限运行功耗为全速运行时的45%,安卓系统运行功耗明显降低。A dynamic frequency scaling（DFS） architecture was presented based on the domestic UniCore embedded platform.The kernel and driver layers of dynamic clock supply and DFS were designed and implemented based on the DFS architecture,and the conventional DFS scheme was modified to adapt different application scenarios.Other low power techniques,such as LCD backlight adjustment and single module sleep/wakeup etc.were incorporated into the DFS architecture.Experimental results based on a self-designed low-power platform indicated that,by using the proposed scheme,the extreme running power of the system accounted for only 45% of the power for system running at full-speed in typical application scenario,and the power consumption of Android system in running mode was significantly reduced.

关 键 词：UNICORE 安卓系统 低功耗策略 动态变频 

分 类 号：TP302[自动化与计算机技术—计算机系统结构]