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-   -   Overclock the N900? (https://talk.maemo.org/showthread.php?t=39753)

zarf 2010-04-03 14:59

Re: Overclock the N900?
 
Any chance of packaging the 800mhz version up into an extras repo item, like the sixadd kernal mod is.

Then we can install with a simple enforced system restart but no flashers involved.

Or is this impossible for this operation?

Really want to try running at 800

:)

Fantastic work guys, so impressed !

Vaskinn 2010-04-03 15:01

Re: Overclock the N900?
 
Has anyone done any experiments lowering the lowest frequencies and seen any significant impact on battery life?

One common usage for me is the music player running alone, with the sound out through headphones or bluetooth. Checking now it spends "most" of that time in the 250MHz state, and I'm wondering if lowering it to e.g. 200MHz would be enough and give any improvement to battery life?

Btw is the time output from "cat /sys/devices/system/cpu/cpu0/cpufreq/stats/time_in_state" in milliseconds or something else?

fixfox 2010-04-03 15:07

Re: Overclock the N900?
 
Quote:

Originally Posted by Vaskinn (Post 593813)

One common usage for me is the music player running alone, with the sound out through headphones or bluetooth. Checking now it spends "most" of that time in the 250MHz state,

My N900 cpu (overclocked to 900Mhz) runs at 125Mhz with the load at 45%

Lehto 2010-04-03 15:20

Re: Overclock the N900?
 
Quote:

Originally Posted by zarf (Post 593811)
Any chance of packaging the 800mhz version up into an extras repo item, like the sixadd kernal mod is.

Then we can install with a simple enforced system restart but no flashers involved.

Or is this impossible for this operation?

Really want to try running at 800

:)

Fantastic work guys, so impressed !

No way. Too dangerous! Well somebody might do it, but that somebody isnt me. This overclocking kernel is very experimental and only for those people who are willing to risk their device breaking and/or reducing its lifetime.

Megaltariak 2010-04-03 15:30

Re: Overclock the N900?
 
So can someone upload an 800/1000mhz kernel here please ?
I don't think that this is very dangerous: If a person know how to use the flasher, I think that he know also the risk of flashing a kernel.

felbutss 2010-04-03 15:36

Re: Overclock the N900?
 
i just found this. where is the link for the kernel?? i wanna test

Flandry 2010-04-03 15:37

Re: Overclock the N900?
 
Quote:

Originally Posted by Megaltariak (Post 593836)
So can someone upload an 800/1000mhz kernel here please ?
I don't think that this is very dangerous: If a person know how to use the flasher, I think that he know also the risk of flashing a kernel.

Heh. The risk isn't in flashing the kernel, it's in the nearly 50% overclock. You're going to adversely affect your CPU lifetime doing that. Period.

Whether the amount it is decreased is relevant is another issue, but there's no getting around the fact that the increased temperature will accelerate damage due to electromigration, and there are probably other factors in new CPUs i'm not even aware of.

Don't kid yourself this is 100% harmless.

buxz777 2010-04-03 15:44

Re: Overclock the N900?
 
Quote:

Originally Posted by felbutss (Post 593841)
i just found this. where is the link for the kernel?? i wanna test

pm sent mate

Rushmore 2010-04-03 15:45

Re: Overclock the N900?
 
Quote:

Originally Posted by Flandry (Post 593844)
Heh. The risk isn't in flashing the kernel, it's in the nearly 50% overclock. You're going to adversely affect your CPU lifetime doing that. Period.

Whether the amount it is decreased is relevant is another issue, but there's no getting around the fact that the increased temperature will accelerate damage due to electromigration, and there are probably other factors in new CPUs i'm not even aware of.

Don't kid yourself this is 100% harmless.

Your efforts with MAME put you in the god-like category for me, but the 3430 is clocked as standard at 800 mhz in some devices and people have been using the Droid for months at this speed and higher. Temps spike once breaching 1ghz and this appears to be around where the ceiling of the 3430 is.

Again, this assumes the 3430 in the N900 is the same as the Archos 500 MP and Sammy / Motorola phones. A key for the Droid though is that SetCPU allows dynamic profiling. Most scale their Droid from 250mhz min and 800mhz max.

Battery impact is nominal on the Droid at 800mhz, but I appreciate the N900's OS will not be the same. The evil pulse audio appears to be a worse resource hog than Android's java layer ;)

Megaltariak 2010-04-03 15:47

Re: Overclock the N900?
 
I don't think that this totally harmfull, but the CPU is overclocked only when needed. So ~95% of time it will be at 250/125 Mhz. I will test 1Ghz and if it is non totally stable/too heat/eat too many battery, I will come back to 800/600Mhz.
But a overclocking is very usefull for emulation/ video recording or playback so I want to test :)


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