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I know for the droid there are lots of custom kernels that use very low voltages for high speeds. Do we have custom kernels like this?
The processor in our phone is that of the original 2g/3g iPhone, the 528mhz Qualcomm (that should have been updated 3 years ago).
The processor in the Droid is the same as the iPhone 3gs (except 550mhz clocked instead of 600mhz).
The Droid processor has a floating point co-processor (sort of) which is why the Linpack scores are WAY higher than ours (it doesn't actually mean the phone is faster, it just does certain floating point operations faster).
The Droid processor is also SEVERELY underclocked, probably for power reasons. There is more of a demand in the Droid crowd to control power usage while still increasing speed (hence the low-voltage kernels, etc). "Lower voltages" are found by using different ways to multiply the frequency, but in a processor like ours, we are limited in the different speeds we can multiply (not to mention a ceiling of reasonable operation being usually 800mhz or below).
See, some people want their droids to be at 800mhz. They want that great battery life, to keep things cool, and a small performance boost.
Some want to go up to 1300mhz, maybe because they play games, or because the think they're cool, or whatever. That requires different methods for overclocking (depending on which exact speeds) and uses a lot more juice. You could use a 1300mhz kernel and keep it down around 800mhz (or whatever specific speeds the kernel allows), but that kernel might not be built for low voltage - you might just be still multiplying a number that keeps your voltage high, instead of the 800mhz Kernel that only goes so high, but keeps things easier on the battery.
Our Eris processors are more limited. Pretty much, you want your Eris OC'd (usually to the 700+mhz somewhere is all you get), or you don't. If you don't want it OC'd, you just don't install SetCPU. If you do, you install and use it (or whatever other overclocking app/widget you want).
To use your Eris low voltage, you pretty much need to stay 480mhz or lower. I keep my sleep SetCPU Profile at 122mhz-480mhz. VERY good on battery, and it throttles up to 480mhz (so the phone rings faster) when it's time for a call to come in.
Some Kernels have some things enabled (netfilter for wifi tethering and other things, a2sd enabled, overclocking, etc - depending on how it's put together). It's probably best to have a kernel that allows everything, since with our processors, there's not much of a power drain penalty (none that I know of in fact) for having a different kernel, and just running at 528mhz. I notice no battery difference at 806mhz in fact, it's a matter of having SetCPU profiles (or whatever) set up correctly and effectively.
Here are a few Kernels you might find (but most are incorporated in ROMs already, so you'll virtually NEVER have to flash it - except that I use Ivan's Eris_Official 1.0 ROM with zanfur's beautiful v3 kernel - it works perfectly at 806mhz on my Eris).
AOSP kernel with all the goodies:
http://forum.xda-developers.com/showthread.php?t=688275&highlight=kernel
Zanfur's kernel (my favorite):
http://forum.xda-developers.com/showthread.php?t=679102&highlight=kernel
Kaos posted this one for AOSP:
http://forum.xda-developers.com/showthread.php?t=688439&highlight=kernel
Darchstar posted this one:
http://forum.xda-developers.com/showthread.php?t=686797&highlight=kernel
The point is that for us, it's not that useful to flash kernels. Most of the ROMs you'll download (even the most 'basic' ones) have all the goodies enabled on the Kernel.
Different phone, different hardware, different ballgame.
God damn. Best answer I could have hoped for. Seriously thanks a ton man, that was everything I could have wanted to know thoroughly explained.
nvm. answered my own question hah
I'm on Conap's new CFS Kernel. I multitask a lot so that's the kernel for me. Everything feels more responsive. Like 1.5x the responsiveness from the (I think) BFS kernel nonsensikal comes with. I typed all of this without even a hint of lag.
Sent from my nonsensikal froyo using XDA App
Yeah I've learned a lot since I made this topic a few months ago lol
I'm on V4 cfs
5thAgent said:
I'm on Conap's new CFS Kernel. I multitask a lot so that's the kernel for me. Everything feels more responsive. Like 1.5x the responsiveness from the (I think) BFS kernel nonsensikal comes with. I typed all of this without even a hint of lag.
Sent from my nonsensikal froyo using XDA App
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Click to collapse
Which keyboard did you use?
I'm using Kaos's DroidX keyboard - Froyo port.
Sent from my nonsensikal froyo using XDA App
I stumbled upon these apps by dumb luck and decided to post this for anyone that doesn't know they exist. The dev is Chinese I am guessing based on a lot of his apps being in Chinese. He soes have these 3 apps in full English though and I am glad he does! For anyone that is looking for a SetCPU alternative, look no further. I will be the first to admit that I am not crazy about SetCPU. The app and I don't get along because of stability issues. CPU Master can do everything SetCPU can do but with better stability. I have been using it on both of my Vibrants. I have one Vibrant with the MIUI Rom (1.7.29) with the Bali 1.1.1 kernel and the other Vibrant is running CM7 Trigger Redux #17 with the Bali 1.1.1 kernel. I have had ZERO issues with the phones. Set on boot work flawlessly and overclocking is a breeze. The will give you every scaler that is included with the kernel you are running along with whatever overclock speed is set in the kernel. The Bali kernel supports up to 1.4Ghz and thats what the slider is maxed at. I loaded the Glitch kernel that supports 1.7Ghz overclock to see if the slider adjusts to that speed and as expected, I got 1.7. The only difference between the Free version and the paid version is that you can set and edit profiles in the paid version. For 1.99, its well worth the investment!
The Benchmark app ties directly into CPU Master. It tests everything that Quadrant Advanced (paid version) does PLUS it tests the speed of your SD cards! All of this and it's Free. If you are playing with overclocking speeds on your phone to see where the threshold is on your device, this benchmark will tell you. Through its rigorous testing you will see right away if your phones CPU can handle the speed you are testing. If you lock up during the test, its time to slow it down! On my MIUI Vibrant, I can only go up to 1.3Ghz and beyond that it freaks out. On my CM7 Trigger Vibrant, I can run 1.4Ghz with no problems.
Smart Profiles Free is a great app for people who spend part of their day in places where being quite is important. You can create all kinds of different profiles throughout your day to keep your phone running like the way YOU want it and not worry about turing on and off features. Just make your profiles and you are done! For example, from Monday to Friday I am at work 8 - 4:30 and I want my phone on Vibrate only. During those times I also want my WiFi on to use the company's internet and not my data plan and I also want my GPS off. As you can see you have A LOT of control of the various functions of your phone!
These apps are definitely worth the time to take a look at and try out. For any end user that wants even more control of their phone, they are certainly a fantastic addition!!
Free Apps:
CPU Master (Free): https://market.android.com/details?id=com.antutu.CpuMasterFree
AnTuTu Benchmark: https://market.android.com/details?id=com.antutu.ABenchMark
Smart Profiles (Free): https://market.android.com/details?id=com.antutu.phoneprofilefree
Paid App:
CPU Master for ROOT Users: https://market.android.com/details?id=com.antutu.CpuMaster
Excellent over / underclocking utility!
Yes, sure Antutu CPU Master is really a very good and powerful utility. I bought the pro version and it is worth the money. I am using it in my Samsung Infuse 4G, this allow the device to be underclocked till 100 MHz and overclock up to 1800 MHz, of course with the required Kernel and root access. It can be configured by the readymade profiles that can automatically change the clock settings based on conditions.
The widget which is just two column wide and 1 row height shows CPU Speed, Battery Status and Temperature.It has profiles, default, Charging, Screen off, In Call, Low battery, Temperature over-heat.
For stable clock setting set the minimum to 800 MHz as below this the device goes unresponsive particularly when the screen is off. I am using the range between 800 - 1800 and so far no issues, and it works great!
As mentioned, the benchmark, CPU setting and profile are great features of Antutu collection of software. Thanks to them!
Why my phone does not support OC ?
Non OC kernels and roms work just fine but with OC always bootloop.
Is this hardware based or software based restriction? Anyway to bypass this?
Thanks for help
There is a maximum your phone can overclock to before it begins drawing too much power for it to handle. Maybe you are trying to push it too far?
V07A4ER said:
Why my phone does not support OC ?
Non OC kernels and roms work just fine but with OC always bootloop.
Is this hardware based or software based restriction? Anyway to bypass this?
Thanks for help
Click to expand...
Click to collapse
Or maybe you should try using a kernel that can actually be overclocked...
Sent from my Desire HD using XDA
Well, I take it for granted that you have the right kernel with OC support.
Once you have the right kernel -generally speaking- and one application that manages the OC (or the terminal itself) you've gone half way long, since not any Cpu is the same, even if it should be, according to the manifacturer.
The naked truth is that Cpus are built in order to match the standard clock to which they are set, while some of them can bear a huge overclock. But the matter is that you have got to play with undervolt and overvolt, to get the right tuning.
Most patched kernel support a uv-ov fine tuning and each of us must look for the right tuning for his own device.
Always generally speaking, you can look for "smartreflex technology" to get what it is (it something by Texas Instruments).
So for example, my gio stock clock speed is 787 (actaully runs at 800 though on stock roms). Some people can overclock it 940MHz stable, while some people (like me) can only stably overclock to a mere 844. One tick over to 864 for me, and the whole thing craters and reboots like crazy.
Im using Cyanogen Mod 9 and the kernel does not support Over/Under Volting, only CPU scaling. So if i got a new kernel that supported everything my one does now like init.d, scaling, and all of that good stuff, if i was to overvolt, would my CPU handle a larger overclock? Or is this simply limited by the variations between cpu's when it was built?
Well, I am neither a professional coder nor a CPU manifacturer but, according to my one year experience at Nokia n900 Italia forum, which I think could be referred to any arm cpu, even if the phone runs android, the differences between the same CPU are huge band the only way to get the best id to try a lot.
For example, my n900 CPU standard running at 600 MHz, could not bear extremely undervolted profiles but, at standard voltage, was stable at 1150 MHz...
So, just try though imho undervolting and scaling to save battery life are more appealing than oc itself.
---------- Post added at 01:18 AM ---------- Previous post was at 01:08 AM ----------
One more thing, because I had missed a part of your post.
IMHO overclocking and overvolting together are the evil itself because of the heat that such thing would cause and the phone is not a pc with its fan to refresh...
Much better oc and undervolting
Has anyone tried overclocking the s4 zoom. is it possible to go above the 1.5Ghz, or overclock the gpu ?
pileiba said:
Has anyone tried overclocking the s4 zoom. is it possible to go above the 1.5Ghz, or overclock the gpu ?
Click to expand...
Click to collapse
I m planning to underclock it further instead , for an even longer battery life.
I think using setCPU after rooting it may work. (though I ve not root it yet)
ericwww said:
I m planning to underclock it further instead , for an even longer battery life.
I think using setCPU after rooting it may work. (though I ve not root it yet)
Click to expand...
Click to collapse
Any feed back on your experiences yet? I'm currently looking at this as my next phone.
There is an argument to be had that underclocking it wont make any difference to your battery life (unless you keep it fully loaded for the majority of the time). You better off keeping it at the same max clock speed and experimenting with the guvnor settings. The faster the clock speed, the faster you can get something processed and the sooner you can get the phone back into the lower frequencies the better.
If you half the max clock speed and it takes twice as long to process the data you will end up using the same power normally than if you left it at its default clock speeds. Again whether this will yeild battery savings or not is dependant on how you let the CPU ramp up and down. Id rather have a snappy phone when I need it and concentrate on keeping it at its lowest power conuming mode as much as possible.
Hello. I have been running CyanogenMod 10.1-10.2 since I got my device back in July, everything has been working great. Bugfixes have been lovely and all that good stuff; however one thing continues to annoy me. I cannot underclock my device properly. Let's say I go into the normal CyanogenMod Performance settings. Then I put my CPU to something like 1024MHz, then I see how the results went over with PerfMon from Chainfire, it will underclock only on Core 0, the rest of the cores still run up to the standard limit, 1890MHz. The only way I can somewhat successfully underclock is by setting my CPU to 594MHz or lower, at which point it will disable all cores except Core 0.
This has been annoying me for a while, I am running the standard CyanogenMod kernel, and recently I tried the Elite Kernel. The only thing the Elite Kernel did was remove the ability to disable the other 3 cores when below 594MHz. (And add the ability to go up to 2.2GHz, but who wants to overclock the Galaxy S4 yet?)
It may be worth mentioning if I try to tweak individual core settings with Tasker, on Core 0 it will let me set a CPU frequency, then if I go in and try to set something on Core 1, it won't have any of the default values for anything, and I enter them manually, then it will give me some errors about not finding the governor I said and stuff like that.
Anyone who knows any way to fix this (Custom kernels, different ROMs (Only for curiosity, I would stick to CyanogenMod anyway), etc) would be greatly appreciated.
Anyone who questions my motives for underclocking, question away. I don't like how my battery life is next to junk when I'm not even touching my phone all day, and the GS4 hardly needs the CPU it has, so I plan to use Tasker to set up a bunch of power saving mechanisms.
I suppose I do have one other question. Will underclocking even benefit me if I can't modify the voltage settings? Are they modified automatically when you're running at lower frequencies? (You would hope so, considering it's kinda a mobile device with a power source that isn't infinite). But if it won't help me without lowering my voltage (and if it isn't modified automatically) is there any good way to do that with a Tasker based setup, so it can be switched instantly whenever I do something? For example, launching a music player. All 4 cores shoot up to 1890MHz (I know they eventually settle down to lower frequencies, but for example's sake), I would rather have it so when I launched the app, Tasker would come in and set my CPU to ~800MHz with only a single core. Everything might slightly lag, but it would work and I would potentially get better battery life while listening to music.
Also, I never tested this on TouchWiz, as I didn't stay on it for more than 30 minutes after I got my device.
I am running the latest CyanogenMod nightly in case it matters (20131002, and it'll be 20131003 tomorrow unless it breaks something)
Thanks in advance to anyone who can possibly help with this. I'm sorry if the post is unorganized, but I hope it's understandable.
[bump]
Forgive me for my ignorance since I'm on ME7 and unable to flash CM10.x yet, but couldn't you just try different governors instead? On my old phone I was using lulzactive and it gave me great battery life, and you could tweak all the values any way you want for more performance or battery life.
I also remember when I experimented with undervolting and much to my dismay it turns out it made my battery life WORSE because of all the error correcting it was doing.
I get at least a days worth of moderate/heavy use on mine and with how fast it charges I don't really care about battery life but I'm curious how much actual gain you'll get for your efforts