Hi, Does anyone has the SAS document for the powertop tool? Currently I am going through the implementation details and it will be helpful to have the spec to understand the design. Also few other queries which I came across: - how powertop retrieves the C state counters? - how to use the tuning option? In the GUI there is a separate tab for this and I can see GOOD and BAD values associated with every entry. How to interpret this information? regards Adrip