Android - Handset built in Developer Tools - "Show Cpu Usage" option meaning?

Question

Android handset shows a list of Developer Tools and Options (under Settings > Developer) to the user and can be displayed on the user's screen. There is various data which gets displayed like: 6.002 / 6.48 / 8.23,and next lines shows some services running in the background . What is the concept behind this?

Answer 1

Numbers in the first row shows average CPU usage in time intervals 1 minute/5 minutes/15 minutes. Color bars shows how much time CPU spends in userspace(green), kernel(red), i/o(blue).

Answer 2

From the developer site we have:

1. Show CPU Usage: Displays CPU meters at the top of the screen, showing how much the CPU is being used. The top red bar shows overall CPU usage, and the green bar underneath it shows the CPU time spent in compositing the screen. Here http://developer.android.com/tools/debugging/debugging-devtools.html

2. Also we have an answer about it here https://stackoverflow.com/a/10829592/826657