powertop with VBox + WinXP idle
public text v1 · immutable
C-states (idle power) Avg Residency P-states (frequencies)
C0 (cpu running) (27.9%) 1400 Mhz 100.0%
C1 1.2ms (72.1%) 2700 Mhz 0.0%
Wakeups-from-idle per second: 1342.3 interval: 5.0s
no ACPI power usage estimate available
Top causes for wakeups:
68.9% (924.7) <kernel> : genunix`cv_wakeup
8.3% (111.8) <kernel> : genunix`realitexpire
7.4% (100.0) <kernel> : genunix`clock
5.0% ( 66.7) <kernel> : ohci`ohci_handle_root_hub_status_change
3.7% ( 49.9) <kernel> : SDC`sysdc_update
2.3% ( 30.5) <interrupt> : ahci#0
1.4% ( 19.4) <kernel> : genunix`lwp_timer_timeout
0.8% ( 10.8) <interrupt> : e1000g#0