Powertop Statistics - Difference 2.6.22-14-kubuntu vs. 2.6.24-vanilla

[Dennis Jansen]

The powertop homepage stated you'd be interested in statistics. So here we go:

Linux Kubuntu Gutsy 2.6.22-14-generic #1 SMP Thu Jan 31 23:33:13 UTC
2008 x86_64 GNU/Linux @ 30.7 watts constant:
PowerTOP 1.9    (C) 2007 Intel Corporation
Cn                 Time
C0 (Processor running)    (100,0%)
C1                            0,0ms ( 0,0%)
C2                            0,0ms ( 0,0%)

Wakes per Second : 42327,1 Interval: 15,0s
 25,7% ( 95,8)       <interrupt> : extra timer interrupt
 21,8% ( 81,5)           mplayer : do_nanosleep (hrtimer_wakeup)
 12,6% ( 47,1)           konsole : schedule_timeout (process_timeout)
 12,6% ( 46,9)       <interrupt> : uhci_hcd:usb2, HDA Intel
 11,0% ( 40,9)       <interrupt> : ahci
  9,4% ( 35,2)       <interrupt> : uhci_hcd:usb4, bcm43xx

compared to Kubuntu Gutsy 2.6.24.2-vanilla @ 23.8(idle) - 30 watts.
C0 (Processor running)    ( 0,7%)
C1                       0,0ms ( 0,0%)
C2                     54,7ms (99,3%)
P-States (Frequenzen)
Wakes per Second : 18,3    Interval: 15,0s
 18,5% (  4,0)   <kernel module> : usb_hcd_poll_rh_status (rh_timer_func)
 13,9% (  3,0)       <interrupt> : acpi
  9,0% (  1,9)              Xorg : do_setitimer (it_real_fn)
  6,5% (  1,4)       <interrupt> : ahci
(The C-State unfortunately is still only used after S3 and resume.)

So from 30.7 to 23.8 watts and from 40000 to ~ 20-30 wakes / second in idle.

If that isn't great success :)

More information on request.

Cheers,
Dennis