On 7/29/2013 3:52 AM, remu kelly wrote:
> Hi powertop team,
> I have few questions about powertop as below:-
> 1) Does powertop use "<debugfs>/cpuidle/stats" for retriving the C state information.

no

it uses various kernel trace points to collect things as they happen

> 2) Is it possible that on "cat <debugfs>/cpuidle/stats" , we see the C3 state is having '0' count. but at same time powertop show the C3 state being hit?

I am not sure how well cpuidle stats work; never used them.