How to read the Stock CPU Usage data

Question

On Ice Cream Sandwich, an option in the Developer Options is \"Show CPU Usage\", which adds an overlay on the screen (see screenshot below).

My question is, how do I re

Answer 1

From High Performance Android Apps book (page 157):

• what we see is equivalent of adb shell dumpsys cpuinfo command
• Numbers are showing CPU load over 1 minute, 5 minutes and 15 minutes (from the left)
• Colors are showing time spent by CPU in user space (green), kernel (red) and IO interrupt (blue)