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maemo.org - Talk (https://talk.maemo.org/index.php)
-   Applications (https://talk.maemo.org/forumdisplay.php?f=41)
-   -   [Announce] QCPUFreq - modify your maximum CPU speed (https://talk.maemo.org/showthread.php?t=56757)

Flandry 2010-06-30 16:23
Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed
 
Quote:
Originally Posted by SallyJane (Post 735620)
Regularly checking Conky (if that's reliable enough ?) showed no rogue processes running.
TBH i have no idea what's the correct way to check for this. I guess that script that measures time spent in different states maybe, but that would probably affect the results itself.

Thanks for the info; it's strange, all right. I've not really seen a change for better or worse on power kernel so i'm just leaving it be for now.

direx 2010-07-01 08:42
Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed
 
Quote:
Originally Posted by somekeystrokes (Post 735630)
but id like to say tht if the settings are reverted on every call...thn it makes it a little unusable.
coz u cnt set it again and again after every call!
Well, this is a little "feature" of the telephone application. There is nothing I can do about it. You could try editing /etc/pmconfig, maybe the telephone app honors the settings in there.
And usually "underclocking" is only useful if you play games on your N900. So before you launch a game or an emulator, just check QCPUFreq.
I personally do not use the phone functionality much (every two days maybe) - this is why I bought a tablet computer :)


About this temperature thing again:
Would you agree with a factor of 0.65? This would mean 48 raw = 31 real. To me this sounds realistic.

mangal_sk8erboy 2010-07-01 09:03
Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed
 
Quote:
Originally Posted by Flandry (Post 735477)
Battery Graph showed higher consumption using Ideal settings?

FYI the general consensus about 125 MHz is that it actually reduces battery life with well-behaved applications due to the slower race-to-idle (presumably why Nokia didn't use it).

The best explanation that fits with both of your observations is that you have something installed and running that doesn't let the processor sleep much (see e.g. http://talk.maemo.org/showthread.php?t=29284). Have you got some kind of CPU load monitor running to check for the culprit?
aha!i have the the same problem. i think when ive loaded it to 'ideal' , my battery life has reduced. but, i AM online (busy to be precise.i use busy because it supposedly uses less battery than online.) on gtalk through wifi throughout the day.
is that MY culprit?

mangal_sk8erboy 2010-07-01 09:10
Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed
 
Quote:
Originally Posted by SallyJane (Post 735620)
Flandry

Regularly checking Conky (if that's reliable enough ?) showed no rogue processes running.

No placebo either - I was surprised (given how happy many people have been with power kernel) but both Battery Eye and the DCEW showing output of lshal pointed to my battery dropping off a cliff on Ideal. No reboots though.

And my battery life on day 2 of QCPUFreq alone is noticeably, actually measurably better ( 68% now after 12 hours use, as opposed to 40 odd percent on stock and 30 odd percent on ideal ) .

I can't explain it, but there.

Overall my little N900 has been exceptionally well-behaved on both software and hardware fronts. I'm quite content to sit back and enjoy my newfound lease on battery life for now ;)
wow. okay so can you tell me in detail what your settings are?u have the ideal setting running?or did u reboot your phone before youve installed cpufreq?
and what are your settings on cpufreq?

SallyJane 2010-07-01 12:19
Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed
 
Just using the stock kernel, and CPU freq 125 min, 500 max :)

mangal_sk8erboy 2010-07-01 17:31
Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed
 
Quote:
Originally Posted by SallyJane (Post 736996)
Just using the stock kernel, and CPU freq 125 min, 500 max :)
hmm..but doesnt that make your phone extremely slow and unresponsive?have you tried running a few apps that needs 600 mhz?

SallyJane 2010-07-01 18:25
Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed
 
TBH the performance hit IMHO is negligible, and the battery saving noticeable !

Exactly what apps need 600 MHz ? (I'm not really into emulators)

ndi 2010-07-01 18:31
Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed
 
Phone.

Also, intensive stuff like HAM and video capture suffer.

SallyJane 2010-07-02 07:18
Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed
 
Yup I know Phone resets the CPU to 600 MHz - not sure if anyone with more technical insight than I possess could confirm that it needs 600, but that's what it pegs the CPU at...

I'll test video capture today....so far though (and obviously YMMV etc etc) my settings work just fine for the daily tasks (especially at work) that my N900 ambles through.

Fortunately it's easy enough, through QCPUFReq, to open up the throttle with two clicks.

When needed.

ndi 2010-07-02 09:12
Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed
 
I was unable to operate wifieye in parallel with a call at 600.


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