Develop Bugs

Voltage control questions

I finally got srf 1.2 to work really good. I have a few questions about voltage control.
1. Is it safe to overclock and undervolt?
2. What advantages will I see from undervolting, longer battery life?
3. Does overclocking really make that much difference, and is it safe?
4. Is there a how to, or a guide that can show me how to do it?
Thanks

Yes its safe just don't use the set on boot feature. As for battery improvement some people notice a difference and others don't I personally do undervolt. As for the guide just mess around with it for a while everyone Has different Preferences so results will always be different. I don't undervolt below 75 cause when I do I get lock ups. If you lock up just pull the battery and you'll be fine. I also recommend to use journaling ON cause if you lock up and pull the battery with journaling off you might get data corruption.
Hope this helps.
Sent from my SPH-D700 using XDA App

Yeah that helped but I really just don't know how to use it.

Led4lyf said:
I finally got srf 1.2 to work really good. I have a few questions about voltage control.
1. Is it safe to overclock and undervolt?
2. What advantages will I see from undervolting, longer battery life?
3. Does overclocking really make that much difference, and is it safe?
4. Is there a how to, or a guide that can show me how to do it?
Thanks
Click to expand...
Click to collapse
What kernel are you on?
I'm on Twilight and can overclock to 1.3ghz with full stability. I don't undervolt. Combination of my phone doesn't like it and I'm not looking to save that little battery to get wakelocks (phone doesn't come out of sleep mode because the processor speed is too slow or doesn't have enough juice to make that push.)
If you're using a kernel that can go to 1.4 or 1.5 test it for a while before you save your settings. Also consider buying the paid version. It allows over volting which may allow you to supply enough power if 1.4 or 1.5 causes freezes.
The app is pretty basic. The top bar on the first screen is how low you allow the processor to go in speed. The bottom is how fast. Lower than 100 mhz causes wakelock for me. Or used to. Haven't tried since. My settings are 200-1300 mhz. Second page is voltages. They start at default. If you have extreme, moving them to the right will overvolt and give those speeds extra power. Moving the slider to the left undervolts. Some people can only undervolt at the lowest speeds of say 100-400 mhz. It's a lot of trial and error. Have fun though!

So on the main page my settings are 200-1300, then I press apply settings. How can I tell If it is working, it does not seem that much faster? Do I have to set this every time I turn my phone on? Do I want to save thos for boot up?

Led4lyf said:
So on the main page my settings are 200-1300, then I press apply settings. How can I tell If it is working, it does not seem that much faster? Do I have to set this every time I turn my phone on? Do I want to save thos for boot up?
Click to expand...
Click to collapse
It wont make it much faster
Sent from my SPH-D700 using XDA App

Led4lyf said:
So on the main page my settings are 200-1300, then I press apply settings. How can I tell If it is working, it does not seem that much faster? Do I have to set this every time I turn my phone on? Do I want to save thos for boot up?
Click to expand...
Click to collapse
When you turn your phone off then on, does it show those same settings? The speed boost will be slight. It's not like we're resurrecting Jesus here.

[Q] Calk's Preset Profiles to save battery question?

Notes about Battery Saver script
Can be used with kernels that have init.d support
It completely eliminates the need for an application to set CPU speeds or profiles
Easily customizable if you use a text editor(scripts located in /system/etc/init.d)
It will set Max CPU speed to 500MHz & Min CPU speed to 200MHz when a sleep
If SetCPU, Overclock Widget, Android Overclock or QuickClock Advanced Overclock are detected, the script is ignored, so it will not affect them
Preset profiles are:
1.2GHz - 100-85%
1.0GHz - 84-36%
800MHz - 35-0%
And just an FYI, even at 800MHz, the phone still operates very well & smooth but the battery saving are the real benefit
Click to expand...
Click to collapse
Does this mean that if I don't use Set CPU or any app that undervolt it, the phone will AUTOMATICALLY drop the CPU speed according to my battery level:
1.2GHz - 100-85%
1.0GHz - 84-36%
800MHz - 35-0%
Another word, it will automatically drop CPU speed to 800 MHZ when my battery level is 35-0% in order to save battery?

It won't "Drop" the CPU speed, it will lower the Maximum speed the CPU is allowed to ramp up to.

Drumrocker said:
It won't "Drop" the CPU speed, it will lower the Maximum speed the CPU is allowed to ramp up to.
Click to expand...
Click to collapse
So if I am not doing CPU intensive stuff and just play simple games, email, web surfing phone call, then I am not going to see battery improvement since my CPU probably don't ramp past 800MHZ anyway when I am just doing simple stuff.?

Calk's ROM undervolts the CPU at all speeds so that in itself should help a little with battery life. But you are correct, if you are not doing CPU intensive tasks the CPU probably isn't spending much time at the higher speeds.
There is an app called CPUSpy which shows how much time the CPU has spent in each frequency state.

Your phone will ramp up to 1200 mhz more than you think. When it loads a webpage, it will ramp up to 1200, when it's loading your "simple" game, it will max out for a bit, etc.
It might not stay there for very long, but still. The nice thing about Calkuins rom is that even at 800 mhz, the phone is super smooth and lag free. In fact I just turn setcpu down to 800 all the time.

Let me research setcpu and play around with it. Thanks again for the quick answers.

clamknuckle said:
Your phone will ramp up to 1200 mhz more than you think. When it loads a webpage, it will ramp up to 1200, when it's loading your "simple" game, it will max out for a bit, etc.
It might not stay there for very long, but still. The nice thing about Calkuins rom is that even at 800 mhz, the phone is super smooth and lag free. In fact I just turn setcpu down to 800 all the time.
Click to expand...
Click to collapse
The way Calkulin's rom scripts are setup, setcpu gets reset on every reboot, even if you have it set to boot settings. The scripts installed will still take priority and the old rules apply, just to let you know. So you would have to set setcpu every boot for it to work, that or remove the scripts.
Sent from my SPH-D710 using xda premium

Team era... Does the same idea apply to the blazer 2.0 battery saving script? or does tegrak break it?
Sent from my SPH-D710 using xda premium

I havnt opened that rom, but Im gonna say the same applies, I remove those scripts, 2 will affect the cpu state.
edit, let me clarify, the scripts take prority, even if the app makes a script for init.d, the original script will take over on a reboot. So the script breaks tegrak, setcpu, and voltage control unless you set the app on every reboot.

I am running Calks 2 and desperado kernel. I notice when using setcpu, if you have it set on boot, it will override calks script.
His script does work well on saving battery life though. I ran oc'd while at 20% and still had 1700mhz blazing on performance gov.
I'd still use Calks script over setcpu or tegrak only due to the fact im too sporatic with my phone use to create optimal profiles to fit the way and when i need to use the device.

mindgrind said:
I am running Calks 2 and desperado kernel. I notice when using setcpu, if you have it set on boot, it will override calks script.
His script does work well on saving battery life though. I ran oc'd while at 20% and still had 1700mhz blazing on performance gov.
I'd still use Calks script over setcpu or tegrak only due to the fact im too sporatic with my phone use to create optimal profiles to fit the way and when i need to use the device.
Click to expand...
Click to collapse
Actually in my own testing setcpu will not override the scripts, the slider may stay the same, but trust me, it goes back to 800 (or 1200 over 86%batt), Ive tested it several times. If you want proof Ill tell you how to figure it out. I know Im not respected yet, but I am someone that is known under another name that is highly respected, so, take it as you will.
Sent from my SPH-D710 using xda premium

Era, what's your suggestion for keeping the battery saving scripts running and getting a 1500 ish over clock when needed... something that can do both without having to physically change setcpu everytime. I basically want to permanently over clock to 1.5 and still save as much battery as possible when i have the screen off or it is charging. Idk if setcpu profiles work on this phone because i know they did not work correctly on the galaxy s. And one final question... what voltages do u run at what speeds on the "desperado" kernel to undervolt efficiently?
Sent from my SPH-D710 using xda premium

TeamERA said:
Actually in my own testing setcpu will not override the scripts, the slider may stay the same, but trust me, it goes back to 800 (or 1200 over 86%batt), Ive tested it several times. If you want proof Ill tell you how to figure it out. I know Im not respected yet, but I am someone that is known under another name that is highly respected, so, take it as you will.
Sent from my SPH-D710 using xda premium
Click to expand...
Click to collapse
ERA. I wasn't looking to say that you were wrong in any way shape or form. I would be interested to know how you seen this as I am still in the beginning phases of learning the android system. I do plan on writing my own kernal/roms but I was actually sharing what my logical thought process would have been given the apps and system info I had avail.
I have a little ways to go in understanding the structure and FS of droid. Time is everyones enemy. Thanks for the correction again!

I havnt opened that rom, but Im gonna say the same applies, I remove those scripts, 2 will affect the cpu state.
edit, let me clarify, the scripts take prority, even if the app makes a script for init.d, the original script will take over on a reboot. So the script breaks tegrak, setcpu, and voltage control unless you set the app on every reboot.

I'm currently running Calkulin's rom v2.5, and even at 41% battery I notice the cpu still hits 1.2 Ghz. Is his script activated by default or am I overlooking something? I also have nothing like setcpu installed.

How do I go about overclocking my HTC One X?

Hi all I'm fairly new to these forums, although I have been watching from afar for quite some while now!
I have been trying out custom roms and various kernels and was wondering how do I go about overclocking my device? Only reason I am asking is because I was checking out benckmark results for other devices and noticed some can be particularly high.
Any insight would be most appreciated!

I wouldnt try any overclocking on the HOX because of the heat issues. A more safe and stable way of doing it is changing the govenor of the kernel or forcing cores online. I think you can use core control (in the apps and themes section) to change core behaviour and system tuner to change govenor.

view heisoom
I have now installed core control. Got to admit it is nice having the option to save a bit more power. How much as an estimate do each of cores use anyway just out of interest?

meleelord said:
I have now installed core control. Got to admit it is nice having the option to save a bit more power. How much as an estimate do each of cores use anyway just out of interest?
Click to expand...
Click to collapse
you can download an app called tegrastats to find out more but all you should know is this. once you activate the corecontrol and depending what app you use you should be fine. if i was you i would also use no-frills cpu app. that way you can underclock and would save you more juice

Goku80 said:
you can download an app called tegrastats to find out more but all you should know is this. once you activate the corecontrol and depending what app you use you should be fine. if i was you i would also use no-frills cpu app. that way you can underclock and would save you more juice
Click to expand...
Click to collapse
Fantastic! Many thanks for the advice. I have now installed no-frills cpu, and started to tinker around with the settings. Could I ask as I am still fairly new to some of this, when I first went on to the settings both maximum and minimum were set to 1.5 GHz (Not sure if it was just saying this on the app or not or if these are the actual settings) but I would guess this would use a lot more power am I right?

meleelord said:
Fantastic! Many thanks for the advice. I have now installed no-frills cpu, and started to tinker around with the settings. Could I ask as I am still fairly new to some of this, when I first went on to the settings both maximum and minimum were set to 1.5 GHz (Not sure if it was just saying this on the app or not or if these are the actual settings) but I would guess this would use a lot more power am I right?
Click to expand...
Click to collapse
yes you are right. put the min frequency to say 200 or 300 mhz and then press apply on boot and then reboot and you should be fine

[Q] Kernel for overclocking Arc S to 2 GHZ on CM 10.

My Arc S lags on CM10 and I dont wanna uninstall most apps cause I use them a lot.
Available kernels only overclock to 1.6 GHZ
The only kernel Ive seen reaching these heights is doomlords but its only for the stock roms.
Which kernel would do this?

Overclocking does not give you any performance boost.
And I strongly recommend to not overclock to such frequency, you might brick your device very easily. Permanently.

Someguyfromhell said:
Overclocking does not give you any performance boost.
And I strongly recommend to not overclock to such frequency, you might brick your device very easily. Permanently.
Click to expand...
Click to collapse
Any recommended perfomance tips then?

ken.okech.94 said:
Any recommended perfomance tips then?
Click to expand...
Click to collapse
I didn’t realize that overclocking doesn’t provide any performance boost in Hell, but here on Earth it most certainly does, as I’ve had experience doing so from the early 90’s till today. You should limit the overclock on the Arc S to a maximum of 1.6GHz though because anything higher may lead to accelerated electromigration and shorten the lifespan of the processor, possibly drastically. Individual CPU’s may only hit 1.5 GHz reliably, others 1.7 Ghz. Also, Android is designed to use whatever memory it can, so lots of free memory is not particularly a good thing. But freezing, hibernating or Greenifying apps that aren’t needed all the time will let the system use what memory is then free more efficiently, leading to a better user experience. And I always have at least 7 widgets running, but they really do slow it down.

ken.okech.94 said:
Any recommended perfomance tips then?
Click to expand...
Click to collapse
Same old advice:
- off mobile data when not in use.
- reduce brightness if too bright.
- turn off when not in use etc
- kill the process when not using app(Greenify) and remove recent apps (hold down home button and clear all the apps there)
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why cant i underclock the CPU?

Every time I try to underclock the CPU as soon as I leave the app the sliders go back to where they were originally. Even after applying on boot. Am I doing something wrong?

BakedOnSomeSour said:
Every time I try to underclock the CPU as soon as I leave the app the sliders go back to where they were originally. Even after applying on boot. Am I doing something wrong?
Click to expand...
Click to collapse
Since you've given virtually no information, I will assume that your phone is unrooted and/or running with the stock kernel. You will need to address both to be able to underclock.

Because underclocking is silly.

Wakamatsu said:
Since you've given virtually no information, I will assume that your phone is unrooted and/or running with the stock kernel. You will need to address both to be able to underclock.
Click to expand...
Click to collapse
I am rooted and running elementalX kernel

BakedOnSomeSour said:
I am rooted and running elementalX kernel
Click to expand...
Click to collapse
I'm not running EX. Does it use init.d or config script? Those may overwrite whatever method you're using to underclock at boot.

Underclocking-saving battery
Is a BIG LYE
CPU will not use full power (max freq) when not need.
Dont forget what is Mhz (how MUCH things CPU can do in what TIME) the only deffrent bettwen underclocked and overclocked is TIME.312Mhz will do something in 5 mins,but 2 Ghz will do it in 1 second. It just do faster,but battery use is same,count yourself

1. You warmed up a dusty thread.
2. Battery-work isn't simply product of time and frequency: longer low tasks eats fewer capacity than shorter peak ones.