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

[Mark Haywood]

Matt Ingenthron wrote:
> Hi Mark/all,
>
> I'm sorry to say, with my Tecra M9, I have the very same issue.  More 
> inline below...
>
> Brock Pytlik wrote:
>> Bill Nesheim wrote:
>>> On 04/24/09 11:55, Mark Haywood wrote:
>>>> Bill Nesheim wrote:
>>>
>>> <snip>
>>>>
>>>> The current_clock_Hz is a little deceiving. The Power Aware 
>>>> Dispatcher results in much more frequent P-State transitions. Try 
>>>> running /usr/bin/powertop for better information.
>>>>
>>>> Mark
>>>
>>> Indeed.  powertop shows the system switching nicely between 800Mhz 
>>> and 1401 Mhz), with most time spent at 800.  Thanks.
>>>    -- Bill
>>>
>> Unfortunately, I don't see the same thing on my Tecra M10. Perhaps I 
>> haven't twiddled the right switch to turn power management on, but I 
>> would've expected this to have been on by default. In any case, 
>> powertop reports that my machine's always at 2531 Mhz (more detailed 
>> output below in case that helps).
>
> Similar to Brock's situation, mine is always staying in the fastest 
> P-state.
> Reading the thread I've tried setting cpupm in power.conf to "enable", 
> "enable poll-mode" and "enable event-mode", running pmconfig each time 
> I made a change.  No luck... it stays at the highest P-state the whole 
> time.
> This seems to be a change in behavior.  powertop used to show 
> different P-states in reaction to load.
> I also went into the BIOS setup and verified everything was dynamic 
> and at defaults.  Any thoughts?

You might want to run mpstat to see the percent idle. If poll-mode isn't 
doing anything for you then your processor is less than 85% idle.

Mark

>
>             OpenSolaris PowerTOP version 1.1
>
> Cn            Avg    residency    P-states (frequencies)
> C0 (cpu    running)        (27.2%)         800 Mhz    0.0%
> C1            0.5ms    (72.8%)        1200 Mhz    0.0%
>                                                1600 Mhz    0.0%
>                                                2200 Mhz    0.0%
>                                                2201 Mhz(turbo)    100.0%
>
> Wakeups-from-idle per second: 1531.7    interval: 5.0s
> Power usage (ACPI estimate): 29.495W (discharging: 0.7 hours)
>
> Top causes for wakeups:
> 15.6% (239.5)               <kernel> :    genunix`cv_wakeup
> 6.5% (100.0)               <kernel> :    genunix`clock
> 5.4% ( 82.0)                  sched :    <cross calls>
> 5.2% (    80.2)         <interrupt> :    i8042#0
> 1.4% (    20.8)         <interrupt> :    iwk#0
> 1.2% (    19.0)               <kernel> :    
> uhci`uhci_handle_root_hub_status_change
> 1.2% (    17.8)            firefox-bin :    <cross calls>
> 0.7% (    10.2)               <kernel> :    genunix`delay_wakeup
> 0.7% (    10.0)               <kernel> :    ata`ghd_timeout
> 0.5% (     8.4)                  intrd :    <cross calls>
> 0.5% (     7.6)               <kernel> :    
> ehci`ehci_handle_root_hub_status_change
> 0.3% (     5.0)               <kernel> :    uhci`uhci_cmd_timeout_hdlr
> 0.3% (     4.0)            <kernel> :    genunix`schedpaging
> 0.1% (     2.0)            <kernel> :    cpudrv`cpudrv_monitor_disp
> 0.1% (     1.2)            <interrupt> :    ata#0
> 0.1% (     1.0)               <kernel> :    e1000g`e1000g_local_timer
> 0.1% (     1.0)               <kernel> :    TS`ts_update
> 0.1% (     1.0)         <interrupt> :    uhci#4  0.1% (     
> 1.0)            <interrupt> :    uhci#0
> 0.1% (     1.0)         <interrupt> :    nvidia#0
> 0.1% (     1.0)            <kernel> :    ip`tcp_time_wait_collector
>
> mi109165 at hancock:~$ cat /etc/power.conf
> #
> # Copyright 1996-2002 Sun Microsystems, Inc.  All rights reserved.
> # Use is subject to license terms.
> #
> #pragma ident    "@(#)power.conf    2.1    02/03/04 SMI"
> #
> # Power Management Configuration File
> #
>
> device-dependency-property removable-media /dev/fb
> autopm            default
> autoS3            default
> cpu-threshold        1s
> # Auto-Shutdown        Idle(min)    Start/Finish(hh:mm)    Behavior
> autoshutdown        30        9:00 9:00        noshutdown
> cpupm  enable poll-mode
>
>
> Thanks in advance,
>
> - Matt
>