基于CPUfreq的DVFS节能技术的研究与实现

Research and Implementation of DVFS Energy-Saving Technologies Based on CPUfreq

摘要:

针对目前计算机系统普遍存在的功耗较大的问题,研究和实现了基于CPUfreq的DVFS节能软件；首先,分析和比较了计算机系统现有主要的功耗管理框架；然后,阐述了CPUfreq子系统及其框架结构,并基于CPUfreq子系统开发了DVFS节能软件,实现了对计算机CPU的动态电压频率调节(DVFS)；最后,以720 p视频播放为应用实例,对使用DVFS节能软件后的计算机系统进行功耗测试；测试结果表明,DVFS节能软件可以实现对以PC为代表的计算机系统的初步节能。

Abstract:

Nowadays, computer system requires larger power consumption. In order to solve this problem, the DVFS energy-saving software based on CPUfreq was researched and implemented. Firstly, analyzes and compares the existing main power management frameworks. Secondly, describes CPUfreq subsystem and its frame structure. Furthermore, develops the DVFS energy-saving software based on the CPUfreq subsystem and implements Dynamic Voltage Frequency Scaling (DVFS). Finally, takes the video display of 720p as example and the power consumption testing has been conducted on the computer system where the DVFS energy-saving software runs. The test results show that the DVFS energy-saving software can relatively save the energy consumption of the computer system such as PC. 