maemo.org - Talk - [Announce] QCPUFreq - modify your maximum CPU speed

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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.

direx

2010-07-02 18:13

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

Quote:

Originally Posted by mangal_sk8erboy (Post 737492)

hmm..but doesnt that make your phone extremely slow and unresponsive?have you tried running a few apps that needs 600 mhz?

I am also using 500MHz as a maximum - it is sufficient for the games I play and my battery lasts much longer when playing games.

There are also drawbacks. Firefox for example is pretty slow on 500MHz and it takes a while to launch the browser with that frequency setting. Since Firefox really needs computing power I'd say that one can save more power when running Firefox@600MHz.

jonchew

2010-07-19 01:53

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

quick question..does using this application already doing overclocking? :)

direx

2010-07-19 08:55

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

Quote:

Originally Posted by jonchew (Post 756288)

quick question..does using this application already doing overclocking? :)

No. For overclocking you need the power kerel. If you already have the power kernel and if you have selected the correct voltages/profile you could also use QCPUFreq for overclocking.

pursueky

2010-07-19 09:37

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

Quote:

Originally Posted by direx (Post 756525)

No. For overclocking you need the power kerel. If you already have the power kernel and if you have selected the correct voltages/profile you could also use QCPUFreq for overclocking.

So where to set the voltages/profiles
Is that up threshold and Sampling rate?

ndi	2010-07-19 23:19

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

I strongly recommend you read the wiki before altering device-nuking factory settings, and then go with the CLI for profiles.

Also, I don't recommend using the GUI for overclocking unless you're OK with finger slipping over settings. I keep the OC to the CLI, and even then, I save profiles so a typo doesn't do bad things.

s33	2010-07-21 18:46

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

Hi guyz...i've changed my min & max freq to 250....is 250-500 setting better than this??

another problem am facing is even if i change my frequency to any settings (250-250,250-500,250,550)at some point of time it gets back to 250-600....

anybody have the same problem?

ndi	2010-07-21 20:42

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

It reverts to default on reboot or on phone call (phone sets freq to 600 regardless). This isn't an issue with over clocking, since it does go above max (kernel re-raises it), but when limited down it may do things to it.

s33	2010-07-21 21:53

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

Quote:

Originally Posted by ndi (Post 759876)

Damn....i never thought that phone calls will revert to default 600.

so which freq setting do you think is good for max battery life:rolleyes:

my usage
=======
1)1:30hrs of video
2)2hrs of music
3)2hrs of calling
4)1hr on 2G(just browsing-no downloading)
5)10-15 sms
6)30mins of playn around with the phone
7)display brightness (i usually keep 2-3bars)

ndi	2010-07-21 23:21

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

At that usage, I suggest either a battery pack or a second battery. Or a separate audio/video player? Stay closer to a wall socket? All of the above?

s33	2010-07-22 00:32

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

Quote:

Originally Posted by ndi (Post 760038)

At that usage, I suggest either a battery pack or a second battery. Or a separate audio/video player? Stay closer to a wall socket? All of the above?

hmmm.....but i think its possible....i almost got that kinda backup.....:rolleyes:

infact i got around 45-50mins on wifi(downloading all the time) from the last 5% of battery yesterday:D

and 1 thing about the stock nokia battery is that i'm not able to charge it to 100%:confused:.......its shows battery full when it reaches 95%....any idea about that?

ndi	2010-07-22 10:24

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

Yes. No battery is charged tp 100, they all lie. Nokia's just being honest. Charging to 100 destroys the battery.

Oh, and , it loses capacity with time, too.

msa	2010-07-31 16:07

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

are there any noticeable framedrops in applications when you keep the cpu at 500 mhz? for example in angry birds or the camera?

how big is the battery life-improvement (roughly in %)?

direx

2010-08-01 12:33

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

Quote:

Originally Posted by msa (Post 771487)

are there any noticeable framedrops in applications when you keep the cpu at 500 mhz? for example in angry birds or the camera?

I haven't noticed any.

Quote:

Originally Posted by msa (Post 771487)

how big is the battery life-improvement (roughly in %)?

This depends. I'd even say it does not have much influence on battery life when playing Angry Birds, because it is not a CPU intensive application. In my optinion limiting the CPU speed only makes sense in a few cases:

when you are playing emulators
for overclocking on power kernels
when the device gets too hot

Spotfist

2010-08-02 07:26

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

i currently have my phone overclocked with Titans kernel, I use qcpufreq to swap between the stock speeds and 1.15ghz, currently I am unable to switch back to 600mhz as there is no option.

I would like to ask if this is the best way to be altering my CPU speeds, I don't need my phone overclocked all th time hence I use this app but am i missing a beat by not changing the voltages etc as mentioned in this thread?

F2thaK

2010-08-02 07:28

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

use CPUfreqUI, not this app for OC'ing dude

Spotfist

2010-08-02 10:07

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

lol I actually posted a question in the cpufregui thread asking if it was better ;)

xuggs

2010-08-02 15:09

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

There was an update to QCPUFreq on app manager. What has changed?

direx

2010-08-08 14:21

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

Quote:

Originally Posted by xuggs (Post 773141)

There was an update to QCPUFreq on app manager. What has changed?

The changelog can be found in the package overview.

cypherth

2010-10-02 13:59

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

i have a problem, i installed 0.3.3 and now the upper limit for overclocking is 600mhz!! all the others are gone...the only thing i can do is to lower to 250, i cant see over 600.....:(
i tried to reinstall kernel for power users but nothing changed?
any idea????

direx

2010-10-02 18:46

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

Quote:

Originally Posted by cypherth (Post 831608)

i have a problem, i installed 0.3.3 and now the upper limit for overclocking is 600mhz!!

Could you please provide the output of this command:

Code:

cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies

cypherth

2010-10-02 19:31

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

Quote:

Originally Posted by direx (Post 831772)

could you please provide the output of this command:

Code:

cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies

600000 550000 500000 250000

direx

2010-10-02 19:44

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

OK, in this case it has nothing to do with QCPUFreq - your kernel only supports the frecuencies you have just posted.

You could try a

Code:

uname -a

to see if you are really using the power kernel.

cypherth

2010-10-02 20:00

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

Quote:

Originally Posted by direx (Post 831811)

OK, in this case it has nothing to do with QCPUFreq - your kernel only supports the frecuencies you have just posted.

You could try a

Code:

uname -a

to see if you are really using the power kernel.

thank you for your immediate answer...
the message i receive is : linux nokia-n900-42-11 2.6.28-omap1 #1 preempt sun aug 8 09:50:47 bst 2010 armv71 unknown

what should i do? what does this means? i uninstalled kernel power and reinstalled it but nothi happened...

Megaltariak

2010-10-02 20:36

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

You need to shutdown then power on after installing to use power kernel.

bluefoot

2010-10-03 00:15

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

I just bought an N900 and am slowly familiarising myself with it and adding applications.

However, my research has gotten me nowhere as to which is best, qcpufreq or cpufrequi. Also no idea if cpufrequi changes are permanent - i.e. remain after reboot - or if this is a feature which qcpufreq will be adding. Development, as I understand it, is dead for cpufrequi ... but the commenter here - http://www.my-maemo.com/software/app...to=1388&faq=42 - mentions that some people are working on improving / updating it, however I see no evidence of that on these forums. As this thread attests, qcpufreq seems to be very much alive. What should I do, guys? Could someone do a quick feature comparison?

Airtux

2010-10-03 00:41

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

I have installed the last update (extra-devel), i have find the new button "enable overclcking" i dont like... it's just lost time... sorry.

and i looks my minimum CPU speed is 500MHZ! :eek: it's no good...it's extra-devel. :rolleyes:

cypherth

2010-10-03 05:02

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

Quote:

Originally Posted by Megaltariak (Post 831835)

You need to shutdown then power on after installing to use power kernel.

of course i did that...nothing happened....:mad:
is there any other solution? what am i doing wrong?

direx

2010-10-28 08:54

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

Quote:

Originally Posted by Airtux (Post 831940)

I have installed the last update (extra-devel), i have find the new button "enable overclcking" i dont like... it's just lost time... sorry.

I am planning to add an option in some sort of settings dialog so you only have to enable overclocking once. It's just to prevent noobs with a power kernel from frying their CPU.

Quote:

Originally Posted by Airtux (Post 831940)

and i looks my minimum CPU speed is 500MHZ! :eek: it's no good...it's extra-devel. :rolleyes:

This is probably because you've added 125MHz and 250MHz to avoid_frequencies - so yes: 500MHz probably really is the minimum frequency that the ondemand scaling governor will use.

direx

2010-11-10 13:53

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

Quote:

Originally Posted by Airtux (Post 831940)

I have installed the last update (extra-devel), i have find the new button "enable overclcking" i dont like... it's just lost time... sorry.

Fixed in 0.4.0. Now you only have to enable overclocking once in the QCPUFreq settings dialog.

Could someone please tell me if QCPUFreq with kernel-power 2.6.28-maemo42 (or higher) behaves correctly? I would like to make sure that this works, before I promote a 0.4.*-release to extras-testing.

sophocha

2010-11-10 15:39

Re: [Announce] QCPUFreq - save battery power by adjusting your maximum CPU speed

Quote:

Originally Posted by direx (Post 869182)

42 kernel with qcpu works fine on my phone!

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