Comment 54 for bug 760131

I get the following on a Thinkpad T60 with 2.6.37 (from http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.37.6-natty/):

Cn Avg residency
C0 (cpu running) ( 9.1%)
polling 0.2ms ( 0.0%)
C1 halt 0.2ms ( 0.0%)
C2 0.5ms ( 1.3%)
C3 4.1ms (89.6%)
P-states (frequencies)
  2.17 Ghz 5.4%
  1.67 Ghz 0.2%
  1333 Mhz 0.4%
  1000 Mhz 94.1%
Wakeups-from-idle per second : 244.7 interval: 300.0s
Power usage (ACPI estimate): 19.6W (0.3 hours)
Top causes for wakeups:
  46.8% (189.5) [Rescheduling interrupts] <kernel IPI>
  14.8% ( 60.1) [radeon] <interrupt>
  11.7% ( 47.4) kworker/0:0
  11.5% ( 46.4) [kernel scheduler] Load balancing tick
   4.9% ( 19.7) desktopcouch-se

and the stock 2.6.38:

Cn Avg residency
C0 (cpu running) ( 9.6%)
polling 2.9ms ( 0.0%)
C1 halt 0.2ms ( 0.0%)
C2 0.3ms ( 1.0%)
C3 3.2ms (89.4%)
P-states (frequencies)
  2.17 Ghz 5.8%
  1.67 Ghz 0.1%
  1333 Mhz 0.6%
  1000 Mhz 93.5%
Wakeups-from-idle per second : 306.2 interval: 300.0s
Power usage (ACPI estimate): 24.0W (0.4 hours)
Top causes for wakeups:
  37.6% (166.6) [Rescheduling interrupts] <kernel IPI>
  13.6% ( 60.1) [radeon] <interrupt>
  11.8% ( 52.0) [kernel scheduler] Load balancing tick
  11.5% ( 50.9) kworker/0:0
  10.3% ( 45.4) [extra timer interrupt]