I'm just curious. A lot of the overclock kernels are also listed as UV. I'm assuming that it means undervolt.
What does that do? Is it a battery thing?
Thanks.
That's what I think to, maybe a little Google could help lol
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uses less power than stock kernal for said cpu setting. less power draw = longer lasting battery.
da_dragon2k3 said:
uses less power than stock kernal for said cpu setting. less power draw = longer lasting battery.
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Would that help overclocking?
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UV mean under-volting. And yes, it does help save on battery when overclocking.
Related
I'm currently running the latest non oc/uv of dead horse, and I wanna know what exactly are the benefits of overclocking/undervolting?
I'm already getting really good battery life with the current kernel I have.
Thanks in advance!
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Basically Overclocking makes the phone faster at the sacrifice of lower battery life, Undervolting improves battery life potentially at the cost of processor speed. The proper combination of the two can give you a faster phone with the same or even improved battery life. (very basic explanation i know)
Using setcpu, correct?
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thachosenone said:
Using setcpu, correct?
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shreddintyres said:
Basically Overclocking makes the phone faster at the sacrifice of lower battery life, Undervolting improves battery life potentially at the cost of processor speed. The proper combination of the two can give you a faster phone with the same or even improved battery life. (very basic explanation i know)
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I don't think under volting has anything to do with processor speed. I've under volted quite a bit before with no drop in linpack or quadrant scores. If you drop the voltage too low it will cause the cpu to freeze though.
Would I get better speed if I disabled 1ghz frequency and left 1.2ghz the default Max frequency?
Would it be faster?
Or slower? Or nothing?
Don't like the 1ghz frequency. But I notice my phone is a little slower when disabling. It.
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I thought you were making a kernel with 1.9 ghz overclock? That should be fast enough
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Kidding, correct?
1.2 > 1.0
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Good to see enyo has found where he belongs in xda. Asking questions and learning.
This is a big improvement enyo.
as to 1.2 feeling slower, your putting a massive undervolt on it. Try backing it off a bit and see if responsiveness comes back. Also, higher clock speeds can lead to better battery in theory by completing tasks faster and allowing the CPU to govern back down to a idle state.
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neh4pres said:
Good to see enyo has found where he belongs in xda. Asking questions and learning.
This is a big improvement enyo.
as to 1.2 feeling slower, your putting a massive undervolt on it. Try backing it off a bit and see if responsiveness comes back. Also, higher clock speeds can lead to better battery in theory by completing tasks faster and allowing the CPU to govern back down to a idle state.
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Thanks. Your right. Backed to -75mV on 1.2ghz and faster response came back.
Also it because really fast after switching to the Medium Leakage.
I rarely let my phone sleep, so 1.2 is the maximum I'll go for speed/battery.
But, the more you UV, you get laggy if its too low, but stable?
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Enyo. said:
Thanks. Your right. Backed to -75mV on 1.2ghz and faster response came back.
Also it because really fast after switching to the Medium Leakage.
I rarely let my phone sleep, so 1.2 is the maximum I'll go for speed/battery.
But, the more you UV, you get laggy if its too low, but stable?
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Honestly -50uv across the board yields the best performance, battery life and reliability.
droidstyle said:
Honestly -50uv across the board yields the best performance, battery life and reliability.
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Click to collapse
Is there a advantage if it's undervolted 100+ mV?
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Enyo. said:
Is there a advantage if it's undervolted 100+ mV?
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that would be called overvolting... yes performance may increase, but inturn added heat, less battery life and instability can occur with it.
droidstyle said:
that would be called overvolting... yes performance may increase, but inturn added heat, less battery life and instability can occur with it.
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So -50mV is just enough?
I'll do that. Your good with setups of oc/uv.
Seems really stable for me.
Trying Low leakage for better battery. But Medium is perfect right
Now.
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droidstyle said:
that would be called overvolting... yes performance may increase, but inturn added heat, less battery life and instability can occur with it.
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just tried your setup. And I didn't know how slow my phone was till I used yours. So undervolting to much does slow down your phone. And it Got hot out of no where.
Thanks
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What's the most battery friendly kernel?
I'm using nymphetamine.. what about you?
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In order to determine this one must flash all kernels and test each of them with the same ROM for a minimum period of 24 hours and then when they have finished that post their results.
For the record im using Franco kernel.
No doubt. Insecure kernel
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I'm using postinthewrongsection kernel.
It's the ****.
Smh...
Seriously, nobody can answer this question and yet it is still asked 20 times a week, best rom, best kernel, best modem, whatever.
It's completely subjective!!
What is good for you might be **** for someone else.
As jonny68 said already, try them out.
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nodstuff said:
I'm using postinthewrongsection kernel.
It's the ****.
Smh...
Seriously, nobody can answer this question and yet it is still asked 20 times a week, best rom, best kernel, best modem, whatever.
It's completely subjective!!
What is good for you might be **** for someone else.
As jonny68 said already, try them out.
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I haven't seen that, where can I download the postinthewrongsection kernel?
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Thread closed.
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brian6685 said:
I haven't seen that, where can I download the postinthewrongsection kernel?
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LOL!!!
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Tbh i would recommend any custom kernel that allows you to undervolt, i.e Siyah
i currently have my phone running 100mv below stock and my battery life is better than it was stock
Uv is useless in s3 seriouzly. How much can u save.
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Well think about it, 4 cores consuming 1400 millivolts each.
Undervolt by 100 millivolts and you have saved the equivalent current of 400 millivolts (100 per core).
Thats close to a third of the total consumption of one stock core.
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Undervolting is pointless unless you are planning on overclocking and want to reduce heat.
Battery savings from Undervolting are about 2-3%
This is insignificant and isn't worth the potential instabilities.
Plus it's not even a big consumer of power, The power the cpu uses is dwarfed by everything else in the phone.
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wong section. please ask Q in Q&A subforum
nodstuff said:
Undervolting is pointless unless you are planning on overclocking and want to reduce heat.
Battery savings from Undervolting are about 2-3%
This is insignificant and isn't worth the potential instabilities.
Plus it's not even a big consumer of power, The power the cpu uses is dwarfed by everything else in the phone.
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The CPU is still the largest consumer of power unless you have extremely bright colours showing on the screen. Plus the phone can be undervolted very far below stock settings as it is, so savings should be more than what you quoted. For gaming I'd say my mali patch would bring quite some advantage in terms of power, since the CPU lock is gone and ASV scaling on the GPU can actually take place now, Netarchy already included that into Ninphetamin.
woshiahboi said:
Thread closed.
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lol.. how'd that work out for ya
AndreiLux said:
The CPU is still the largest consumer of power unless you have extremely bright colours showing on the screen. Plus the phone can be undervolted very far below stock settings as it is, so savings should be more than what you quoted. For gaming I'd say my mali patch would bring quite some advantage in terms of power, since the CPU lock is gone and ASV scaling on the GPU can actually take place now, Netarchy already included that into Ninphetamin.
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Somewhere on XDA I've been reading about some1 testing high (nearly max) voltages against as low as possible voltages (but if I remember correctly it has been a single core CPU). His result of this test was that even with such extreme voltage differences he was not able to save one percent of battery.
While I'm not too much into CPU voltages and undervolting I can't say anything about it for sure. But I'll be looking for that article...
swent said:
Somewhere on XDA I've been reading about some1 testing high (nearly max) voltages against as low as possible voltages (but if I remember correctly it has been a single core CPU). His result of this test was that even with such extreme voltage differences he was not able to save one percent of battery.
While I'm not too much into CPU voltages and undervolting I can't say anything about it for sure. But I'll be looking for that article...
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I think I know what thread you are talking about and I completely disagree with those findings, at least on the S2 I did proper measurements myself with -100mV on various frequencies and the power advantage was almost equal to the CMOS power formula f*V² on full load applications. I advise people to stop comparing such articles from different architectures as the Snapdragons or the OMAPs as they have different types of power saving states which influence the measurements greatly. The Exynos is relatively "stupid" in terms of lower power states and relies heavily on DVFS scaling so voltage brings a greater effect on the dissipation.
hefonthefjords said:
Well think about it, 4 cores consuming 1400 millivolts each.
Undervolt by 100 millivolts and you have saved the equivalent current of 400 millivolts (100 per core).
Thats close to a third of the total consumption of one stock core.
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Click to collapse
If you're so concerned with volts per core. Buy the North American version and run it on 2g lol
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Yeah well, I'm sorry if I complicated things. Just thought it's worth pointing out.
For anyone still interested: here
Probably you're right, as I said... can't argue with any of it and hopefully no1 takes my dangerous semi-knowledge as reference.
AndreiLux said:
I think I know what thread you are talking about and I completely disagree with those findings, at least on the S2 I did proper measurements myself with -100mV on various frequencies and the power advantage was almost equal to the CMOS power formula f*V² on full load applications. I advise people to stop comparing such articles from different architectures as the Snapdragons or the OMAPs as they have different types of power saving states which influence the measurements greatly. The Exynos is relatively "stupid" in terms of lower power states and relies heavily on DVFS scaling so voltage brings a greater effect on the dissipation.
Click to expand...
Click to collapse
Well you learn something new every day! Thanks Andreilux :thumbup:
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swent said:
Yeah well, I'm sorry if I complicated things. Just thought it's worth pointing out.
For anyone still interested: here
Probably you're right, as I said... can't argue with any of it and hopefully no1 takes my dangerous semi-knowledge as reference.
Click to expand...
Click to collapse
This is the same study I saw while I was using nexus s.
Tbh I completely ignored the fact that it was single core and different architecture when applying that info here. Oops.
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What does under volting do? And what happens if I do it? And what's the right amount to under volt?
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kevinrubio1 said:
What does under volting do? And what happens if I do it? And what's the right amount to under volt?
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Click to collapse
Undervolting reduces the amount of power the cpu uses, this helps to increase your battery life basically. How to do it? Depends on your kernel/rom, if they have the option, some kernels will require a special app, custom kernels can pretty much use any app that controls the cpu, you can start by reducing the voltage by -25mv, see how stable the device is, if it doesn't reboot, etc. If it does crash and reboot, you know that's 25mv below your processors limit.
Is there an app that will auto-switch your governor/min-max freq, say when the battery drops below a certain level or when you are plugged into power?
flopticalcube said:
Is there an app that will auto-switch your governor/min-max freq, say when the battery drops below a certain level or when you are plugged into power?
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Yes there is! I would recommend taking a look at the app SetCPU https://play.google.com/store/apps/...rce=google&utm_medium=organic&utm_term=setcpu. I have used SetCPU since my Droid 1 was my main phone to do exactly what your looking for (I.E screen of minimum frequency, charging set a particular governor, less then 20% battery powersave governor, etc.). Let me know if you still have questions.
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shimp208 said:
Yes there is! I would recommend taking a look at the app SetCPU https://play.google.com/store/apps/...rce=google&utm_medium=organic&utm_term=setcpu. I have used SetCPU since my Droid 1 was my main phone to do exactly what your looking for (I.E screen of minimum frequency, charging set a particular governor, less then 20% battery powersave governor, etc.). Let me know if you still have questions.
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Most excellent! I'll take a peek.
EDIT: Well that is just the bee's knees! Great app! I also found SetXperia which does a few of the same things (not nearly as much) but also allows me to undervolt. The two in combo look ideal. Thanks again!