When running powertop, I notice that there is a dramatic drop in C3 state residency when running the patched kernel. This happens when you run a patched kernel but without the NO_HZ and HR timers options disabled. C3 state residency drops from about 90% to 50% when the UML kernel is idle. This does not happen when the tickless option _is_ enabled.
Regards,
Hrishikesh Amur