John Martin wrote:
> It may not be anything in user space. From your previous posting,
> powertop
> reported as wakeup sources:
>
> Wakeups-from-idle per second: 632.7 interval: 5.0s
> Power usage (ACPI estimate): 0.000W (running on AC power, fully
> charged)
>
> Top causes for wakeups:
> 30.0% (189.8) <kernel> : genunix`cv_wakeup
> 18.3% (115.6) sched : <xcalls> unix`dtrace_xcall_func
> 15.8% (100.0) <kernel> : genunix`clock
> 4.8% ( 30.1) <interrupt> : iwk#0
> 2.4% ( 15.2) <kernel> :
> uhci`uhci_handle_root_hub_status_change
> 1.6% ( 10.2) <kernel> : genunix`delay_wakeup
> 0.6% ( 4.0) <kernel> : genunix`schedpaging
> 0.6% ( 4.0) <kernel> : uhci`uhci_cmd_timeout_hdlr
> 0.6% ( 3.8) <kernel> :
> ehci`ehci_handle_root_hub_status_change
>
I missed the clue above this was on a notebook. On a Tecra M10 with
b122 from
the /dev repository (although powertop still only reports version 1.1):
OpenSolaris PowerTOP version 1.1
Cn Avg residency P-states (frequencies)
C0 (cpu running) (11.1%) 800 Mhz 0.0%
C1 2.2ms (88.9%) 1600 Mhz 0.0%
2260 Mhz 0.0%
2261 Mhz 100.0%
Wakeups-from-idle per second: 413.0 interval: 5.0s
Power usage (ACPI estimate): 0.000W (running on AC power, fully
charged)
Top causes for wakeups:
24.2% (100.0) <kernel> : genunix`clock
15.6% ( 64.3) <kernel> : genunix`cv_wakeup
5.7% ( 23.5) <kernel> :
uhci`uhci_handle_root_hub_status_change
4.7% ( 19.5) sched : <cross calls>
2.4% ( 10.0) <kernel> : genunix`delay_wakeup
1.9% ( 8.0) <kernel> :
ehci`ehci_handle_root_hub_status_change
1.4% ( 6.0) <kernel> : uhci`uhci_cmd_timeout_hdlr
1.0% ( 4.2) <kernel> : genunix`schedpaging
The P-state hops every other 5s frame from the highest to lowest state.
Since this is a notebook, I cannot disconnect the reported USB devices.
My i920 desktop system is also running b122, but loaded from the SXCE
DVD image.
