On 7/29/2013 6:09 AM, Arjan van de Ven wrote:
> 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
I should mention that we also use hardware counters on systems that have them;
much more accurate than any OS counter ;)