title: Descrip "top" command in Android
body: <p>I'm making a small Android application to show current total CPU usage like tab Performance in Windows Task Manager.
  I use "top -m 1 -n 1 -d 1" to get CPU usage, but i do not really understand the result of "top".</p>
  
  <p>The result like:</p>
  
  <pre><code>User 5%, system 15%, IOW 0%, IRQ 0%
  User 5 + Nice 0 + Sys 14 + Idle 73 + IOW 0 + IRQ 0 + SIRQ 0 = 92
  PID     CPU%  S   #THR    VSS    RSS    UID     Name
  213     11%   R    1      900K   340K   app_16   top
  </code></pre>
  
  <p>CPU usage = ???
  How can i calculated total CPU usage?</p>