Phoronix: Linux's "Ondemand" Governor Is No Longer Fit

By default the Linux kernel uses the "ondemand" CPU frequency governor for achieving maximum clock frequency when system load is high and a lower clock frequency when the system is idle. However, it turns out that for at least modern Intel CPUs, this is likely no longer the case. This default kernel choice may lead to poor battery life and performance for modern Linux systems...

http://www.phoronix.com/vr.php?view=MTM3NDQ