Comment 23 for bug 177895

output of powertop. forefox-3 & nvidia are the only competitors to Rescheduling interrupts for Worst Power Hog Award. battery life on this machine is down to a shocking 1.3 hours, with wireless, bluetooth and even usb turned off.

Cn Avg residency P-states (frequencies)
C0 (cpu running) (28.2%) 1.84 Ghz 0.0%
C1 0.0ms ( 0.0%) 1333 Mhz 0.0%
C2 0.1ms ( 0.3%) 1000 Mhz 100.0%
C3 1.2ms (71.4%)

Wakeups-from-idle per second : 598.2 interval: 10.0s
Power usage (ACPI estimate): 22.4W (0.9 hours)

Top causes for wakeups:
  47.8% (378.3) <kernel IPI> : Rescheduling interrupts
  11.0% ( 86.8) firefox-3.0 : schedule_timeout (process_timeout)
  10.6% ( 83.8) <interrupt> : extra timer interrupt
   8.0% ( 63.2) <interrupt> : nvidia
   5.0% ( 39.3) <interrupt> : PS/2 keyboard/mouse/touchpad
   4.6% ( 36.7) trackerd : do_nanosleep (hrtimer_wakeup)