rmclock power management
Android power management
总体上来说Android的电源管理还是比较简单的, 主要就是通过锁和定时器来切换系统的状态,使系统的功耗降至最低,整个系统的电源管理架构图如下: (注该图来自Steve Guo)
接下来我们从Java应用层面, Android framework层面, Linux内核层面分别进行详细的讨论:
应用层的使用:
Android提供了现成android.os.powerManager类,该类用于控制设备的电源状态的切换.
该类对外有三个接口函数:
...
转载：Android power management
[First written by Steve Guo, please keep the mark if forwarding.]
Overview
The above picture shows the overall architecture design of Android power management module. Android implements a very simple power management mechanism. Currently it only supports set screen on/off, screen backlight on/off, keyboard backlight on/off, button backlight on/off and adjust s...
Link: http://letsgoustc.spaces.live.com/?_c11_BlogPart_BlogPart=blogview&_c=BlogPart&partqs=amonth%3d1%26ayear%3d2009
本文来自ChinaUnix博客，如果查看原文请点：http://blog.chinaunix.net/u2/87831/showart_1891863.html
刚装完系统sco5.0.6
启动过程提示：power management is not configured
这是什么原因？如何解决？
power management Framework
后台进程powerd(1M)作为一个service，在监控着整个系统的power consumption。PM
Framework为这个监控程序和设备驱动的通信提供了接口。
1.设备级：针对个别设备。设备驱动使用统一的模型；配置工具有dtpower(1M),power.conf(4), pmconfig(1M);
在driver和framework之间有标准的DDI接口。
2.系统级：针对整个系统，需要系统cpr(7)模块的支持。系统在被power
down之前，将所有的内核线程和用户进程停下...
001 Dynamic Audio power management for Portable Devices
002 ===================================================
003
004 1. Description
005 ==============
006
007 Dynamic Audio power management (DAPM) is designed to allow portable
008 Linux devices to use the minimum amount of power within the audio
009 subsystem at all times. It is independent of other kernel PM and as
010 such, can easily co-ex...
