[indiana-discuss] b111a: Power Management and nwam-issue ?

[Aubrey Li]

On Sun, Apr 26, 2009 at 1:27 AM, Ioannis Mavroukakis
<imavroukakis at gameaccount.com> wrote:
> Hmm running powertop shows my cpu pegged at warp speed
>
>           OpenSolaris PowerTOP version 1.1
>
> Cn            Avg    residency    P-states (frequencies)
> C0 (cpu    running)        (32.7%)         800 Mhz    0.0%
> C1            0.6ms    (67.3%)        1200 Mhz    0.0%
>                                               1600 Mhz    0.0%
>                                               2000 Mhz    0.0%
>                                               2001 Mhz(turbo)    100.0%

if your system is idle, C0 residency should < 10%.
Here C0 = 32.7%, there must be a workload on the system.

>
> Wakeups-from-idle per second: 1156.3    interval: 5.2s
> Power usage (ACPI estimate): 2.737W (discharging: 0.6 hours)
>
> Top causes for wakeups:
> 19.3% (223.2)               <kernel> :    genunix`cv_wakeup
> 8.6% (100.0)               <kernel> :    genunix`clock

Apparantly, clock should be the top cause for wakeups, not cv_wakeup
if your system is in idle.

> 4.0% ( 46.3)            <interrupt> :    i915#0
> 3.5% ( 40.8)               sched :    <cross calls>
> 3.2% (    36.9)         <interrupt> :    i8042#0
> 1.9% (    21.9)            <interrupt> :    wpi#0
> 1.7% (    19.2)               <kernel> :
>  uhci`uhci_handle_root_hub_status_change
>
>
>
> Q - Quit   R - Refresh
>
> I have cpupm and cpu-threshold setup...it used to work on my Travelmate
> 5720, not any more after svn111..

You can check the system by "mpstat" or "vmstat" or "prstat" to see the cpu
utilization and what is using CPU.

-Aubrey