基于Linux动态频率调整的DPM方案

Dynamic Power Management Scheme Based on Linux Dynamic Frequency Scaling

在嵌入式系统中,提出一个基于Linux动态频率调整(DFS)的动态电源管理(DPM)方案。该方案可以实现2个及2个以上级别的频率调整,为用户提供系统频率等级设定接口,从而增加用户自主选择功能,解决单纯依靠系统自动调整频率等级的数量限制问题,并将应用层、内核层、驱动层程序分开以增强代码可移植性。在S3C2440A平台的实验结果验证了该方案的可行性。

In embedded systems,this paper proposes a Dynamic Power Management（DPM） scheme based on Linux Dynamic Frequency Scaling（DFS）.The scheme can achieve more than 2 levels of the frequency of adjustments,and provide users with the interface which is used to setting system frequency level,thus add the function to help the user select automatically,so that it solves the numerical restrictions problem,that is relying solely on the system to automatically adjust the frequency level.And it separates the application layer,the kernel layer,and the driver layer from each other,thus enhances the portability of code.The realization result of S3C2440A platform proves the validation of this scheme.