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2010-04-03
, 15:01
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Posts: 86 |
Thanked: 199 times |
Joined on Apr 2010
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#242
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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?
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?
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2010-04-03
, 15:07
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Posts: 151 |
Thanked: 82 times |
Joined on Sep 2008
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#243
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Originally Posted by Vaskinn
My N900 cpu (overclocked to 900Mhz) runs at 125Mhz with the load at 45%
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,
Last edited by fixfox; 2010-04-03 at 15:17.
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2010-04-03
, 15:20
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Posts: 126 |
Thanked: 327 times |
Joined on Nov 2009
@ Finland
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#244
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Originally Posted by zarf
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.
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 !
| The Following User Says Thank You to Lehto For This Useful Post: | ||
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2010-04-03
, 15:30
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Posts: 346 |
Thanked: 271 times |
Joined on Jan 2010
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#245
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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.
Last edited by Megaltariak; 2010-04-03 at 15:33.
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.
Last edited by Megaltariak; 2010-04-03 at 15:33.
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2010-04-03
, 15:36
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Posts: 579 |
Thanked: 286 times |
Joined on Oct 2009
@ Australia
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#246
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i just found this. where is the link for the kernel?? i wanna test
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2010-04-03
, 15:37
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Posts: 1,559 |
Thanked: 1,786 times |
Joined on Oct 2009
@ Boston
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#247
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Originally Posted by Megaltariak
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.
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.
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.
__________________
Unofficial PR1.3/Meego 1.1 FAQ
Unofficial PR1.3/Meego 1.1 FAQ
***
Classic example of arbitrary Nokia decision making. Couldn't just fallback to the no brainer of tagging with lat/lon if network isn't accessible, could you Nokia?
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2010-04-03
, 15:44
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Posts: 256 |
Thanked: 98 times |
Joined on Jan 2010
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#248
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Originally Posted by felbutss
pm sent mate
i just found this. where is the link for the kernel?? i wanna test
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2010-04-03
, 15:45
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Posts: 1,255 |
Thanked: 393 times |
Joined on Oct 2009
@ US
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#249
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Originally Posted by Flandry
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.
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.
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
Last edited by Rushmore; 2010-04-03 at 15:51.
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2010-04-03
, 15:47
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Posts: 346 |
Thanked: 271 times |
Joined on Jan 2010
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#250
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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
But a overclocking is very usefull for emulation/ video recording or playback so I want to test
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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 !