get application power

1.

http://blog.csdn.net/sjz_iron/article/details/8726661

http://www.16rd.com/home.php?mod=space&uid=6514&do=blog&id=82

https://android.googlesource.com/platform/frameworks/base.git/+/master/core/java/com/android/internal/os/PowerProfile.java

http://wenku.baidu.com/view/e087ac244b35eefdc8d33352.html

https://source.android.com/devices/tech/power.html

http://blog.csdn.net/yu8fei/article/details/8965094

http://blog.csdn.net/tianxianbaobao1983/article/details/15337759

http://en.wikipedia.org/wiki/Power_Management_Unit

2.java synchronized() block

http://www.cnblogs.com/gnagwang/archive/2011/02/27/1966606.html

proc filesystem

http://www.blogbus.com/wanderer-zjhit-logs/202903394.html

http://www.kerneltravel.net/?p=281

http://man.chinaunix.net/linux/mandrake/101/zh_cn/Command-Line.html/ch10s01.html

http://blog.csdn.net/fightfordream/article/details/6102132

read process list

http://stackoverflow.com/questions/939778/linux-api-to-list-running-processes

http://linuxlookup.com/howto/view_running_processes_linux_system

http://stackoverflow.com/questions/12574202/view-list-of-running-process-in-linux-using-c

1.parse process list in proc filesystem

2.poll /proc/pid/stat periodly, and get update usr time and system time

3.total time = usr time + system time

4.sort linklist according to total time

5.implement IPC to transfer result to show utility

[questions]

1.not include non-interesting processes, kerenl thread

2.how to deal with child processes of a process

http://blog.csdn.net/trochiluses/article/details/10185951

when read cpufreq stat source code, there is question:

1.per_cpu:

http://challengezcy.blog.163.com/blog/static/692292722010101942154673/

http://hi.baidu.com/leowang715/item/112512cae0d19d10b67a24eb

http://www.blogbus.com/wanderer-zjhit-logs/184800425.html

2.kernel notifier

http://blog.csdn.net/wuhzossibility/article/details/8079025

http://fangjian0518.blog.163.com/blog/static/5591965620118295401816/