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Poll: Do you think its possible to overclock the N900?!
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Do you think its possible to overclock the N900?!

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UNderworld is offline UNderworld
2010-04-22 , 23:20
Posts: 362 | Thanked: 113 times | Joined on Feb 2010
#3241
Originally Posted by UNderworld View Post
hi, in the wiki here, it says how to unlock 125mhz, but not how to lock it again.. someone tell me pleasee
Hi all, I got a few replies, but didnt work...
I tried
echo 125000 > /sys/devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies

but phone app still resets MIN to 125mhz..

Can someone tell me the command to UNDO this:
echo 1 > /sys/devices/system/cpu/cpu0/cpufreq/ondemand/ignore_nice_load
 
geneven is offline geneven
2010-04-22 , 23:25
Posts: 5,795 | Thanked: 3,151 times | Joined on Feb 2007 @ Agoura Hills Calif
#3242
It seems to me Titan said not long ago that the 125 Mhz it is reset to in this case is ignored. I haven't checked up on him!
 
nokian-series is offline nokian-series
2010-04-22 , 23:29
Posts: 169 | Thanked: 41 times | Joined on Apr 2010 @ Portugal
#3243
Hi,
If you use Windows, use WinSCP to get root over ssh to N900.
Then go to throught the file system, /sys/devices/system/cpu/cpu0/cpufreq/ondemand/ignore_nice_load (and others), and change the values you want!

Can do it for this one too, and many others:
/sys/devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies

Cheers.


Originally Posted by UNderworld View Post
Hi all, I got a few replies, but didnt work...
I tried
echo 125000 > /sys/devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies

but phone app still resets MIN to 125mhz..

Can someone tell me the command to UNDO this:
echo 1 > /sys/devices/system/cpu/cpu0/cpufreq/ondemand/ignore_nice_load
 

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UNderworld is offline UNderworld
2010-04-22 , 23:30
Posts: 362 | Thanked: 113 times | Joined on Feb 2010
#3244
Originally Posted by geneven View Post
It seems to me Titan said not long ago that the 125 Mhz it is reset to in this case is ignored. I haven't checked up on him!

its supposed to ignore 125mhz is i put that command in.. but something is surely wrong... as its not
 
UNderworld is offline UNderworld
2010-04-22 , 23:37
Posts: 362 | Thanked: 113 times | Joined on Feb 2010
#3245
Originally Posted by nokian-series View Post
Hi,
If you use Windows, use WinSCP to get root over ssh to N900.
Then go to throught the file system, /sys/devices/system/cpu/cpu0/cpufreq/ondemand/ignore_nice_load (and others), and change the values you want!

Can do it for this one too, and many others:
/sys/devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies

Cheers.

I put 125000 in
/sys/devices/system/cpu/cpu0/cpufreq/ondemand/avoid_frequencies

and what do I put in
/sys/devices/system/cpu/cpu0/cpufreq/ondemand/ignore_nice_load..

i tried 0 and 1 and even left it blank.. nothing worked.. it just keeps going to 125 after a call
 
egoshin is offline egoshin
2010-04-23 , 00:22
Posts: 992 | Thanked: 995 times | Joined on Dec 2009 @ California
#3246
Originally Posted by esthreel View Post
Thank you for the info, good explanation. So there are warnings all around about overclocking shortening your nokias life. But if you are not overvolting it and thermal stress is usual thing (stock voltage is even higher which means more heat under load, more thremal stress at 100% load) If I am not misinterpreting your post, the custom kernel voltages and MHZ are even healthy for your device, of atleast not harmful if you have a good chip that works undervolted at 850Mhz with no errors even if it was not designed to.
It is difficult to say. The total energy from battery definitely increases with higher frequency even you run with low voltage. And most of that energy dissipates on CPU.

Just to understand better that a small example. I ran a stock kernel and measured a current from battery under different frequencies. The 250MHz (playing MP3 music) takes only around 110mA but 600MHz (hard loop in shell) takes TEN times more - around 1400mA (screen is dark etc). But CPU VDD1 voltage still differs only 1.26 times (1.58 in square).

So, the biggest power consumption increase is in frequency increase.
You still may have more bigger CPU current under high frequency which heats CPU more even with decreased voltage.
Last edited by egoshin; 2010-04-23 at 00:26.
 
egoshin is offline egoshin
2010-04-23 , 00:23
Posts: 992 | Thanked: 995 times | Joined on Dec 2009 @ California
#3247
Originally Posted by UNderworld View Post
Can someone tell me the command to UNDO this:
echo 1 > /sys/devices/system/cpu/cpu0/cpufreq/ondemand/ignore_nice_load
echo "0" > /sys/devices/system/cpu/cpu0/cpufreq/ondemand/ignore_nice_load
 
gabby131 is offline gabby131
2010-04-23 , 00:35
Posts: 1,729 | Thanked: 388 times | Joined on Jan 2010 @ Canada
#3248
one mor thing to clarify, as i read through this thread, what is really dangerous is "locking" the cpu's frequency @550mhz+, in overclocking, the cpu freqs flactuate and is not locked to any voltages.

does this mean overclocking is somewhat safer (not as safe as the stock freq) as long as you do not lock it to a freq.
 
egoshin is offline egoshin
2010-04-23 , 00:39
Posts: 992 | Thanked: 995 times | Joined on Dec 2009 @ California
#3249
Originally Posted by gabby131 View Post
one mor thing to clarify, as i read through this thread, what is really dangerous is "locking" the cpu's frequency @550mhz+, in overclocking, the cpu freqs flactuate and is not locked to any voltages.

does this mean overclocking is somewhat safer (not as safe as the stock freq) as long as you do not lock it to a freq.
In my best knowledge I think CPU frequency doesn't fluctuate without software (it is not so in Intel Core *i platform - it has some automatic frequency "boost").
 

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UNderworld is offline UNderworld
2010-04-23 , 00:46
Posts: 362 | Thanked: 113 times | Joined on Feb 2010
#3250
Originally Posted by egoshin View Post
echo "0" > /sys/devices/system/cpu/cpu0/cpufreq/ondemand/ignore_nice_load
thanks... but doesnt work
 
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