On Sun, 2009-09-06 at 09:52 +0800, Li, Aubrey wrote:
> PowerTOP should not be the case that causes 100% highest p-state
> residency in idle. We have this bug
>
> "6818514 Event based CPUPM too easily shifts into high gear"
>
> fixed and putback since build 117 by rev#. 9802. It looks like it does not
> fix the problem.
>
> But if you always didn't see the lowest frequency residency when idle,
> there is probably another bug here. It would be great if Seb can post the
> powertop report here.
Sure, here it is:
OpenSolaris PowerTOP version 1.2
C-states (idle power) Avg Residency P-states (frequencies)
C0 (cpu running) (0.0%) 800 Mhz 0.0%
C1 3.2ms (100.0%) 1060 Mhz 0.0%
1330 Mhz 100.0%
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
-Seb
