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Can someone point me to where I can learn how to use set cpu and set voltage properly. Just installed superotimized kernel and wondering how to take full advantage of it
p4ranoid4ndroid said:
Can someone point me to where I can learn how to use set cpu and set voltage properly. Just installed superotimized kernel and wondering how to take full advantage of it
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overclocking is pre-enabled, under volting can be done through an app the link is in the thread. there are 2 settings. try about -50v each if that works fine bump one down to -75mv at a time. test the phone over a day or two and see how it runs, see if it has sleep death after a few periods of inactivity, especially extended periods, see if it has sleep death while charging, which seems to make a difference that will test the low setting.
see if the phone shuts down without freezing, and see if it shuts down without freezing while charging, the heat in the battery makes a big difference, play some 3d games. if you have freezing issues you can disable overclocking under different situation with set cpu or se t the volts to a more conservative setting.
Dani897 said:
overclocking is pre-enabled, under volting can be done through an app the link is in the thread. there are 2 settings. try about -50v each if that works fine bump one down to -75mv at a time. test the phone over a day or two and see how it runs, see if it has sleep death after a few periods of inactivity, especially extended periods, see if it has sleep death while charging, which seems to make a difference that will test the low setting.
see if the phone shuts down without freezing, and see if it shuts down without freezing while charging, the heat in the battery makes a big difference, play some 3d games. if you have freezing issues you can disable overclocking under different situation with set cpu or se t the volts to a more conservative setting.
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I've been told that undervolting can improve the battery time. Of course, lots of varying opinions of how good/bad it may be to overclock.
If I want to just undervolt, is that possible with SetCPU?
Dani897 said:
overclocking is pre-enabled, under volting can be done through an app the link is in the thread. there are 2 settings. try about -50v each if that works fine bump one down to -75mv at a time. test the phone over a day or two and see how it runs, see if it has sleep death after a few periods of inactivity, especially extended periods, see if it has sleep death while charging, which seems to make a difference that will test the low setting.
see if the phone shuts down without freezing, and see if it shuts down without freezing while charging, the heat in the battery makes a big difference, play some 3d games. if you have freezing issues you can disable overclocking under different situation with set cpu or se t the volts to a more conservative setting.
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ewingr said:
I've been told that undervolting can improve the battery time. Of course, lots of varying opinions of how good/bad it may be to overclock.
If I want to just undervolt, is that possible with SetCPU?
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Interesting stuff...
I too would like to know if it is possible to simply under-volt. Does anyone know the optimal settings for SetCpu with the Captivate...or does it vary depending on each users profile/ phones?
So Ive been playing around with various settings for set cpu and voltage control and all has been well so far. The only problem im having is voltage control seems broke. I try to open the all but it just black screens. I tried to clear the memory and unistall and reinstall and still have the same problem. Any ideas?
http://forum.xda-developers.com/attachment.php?attachmentid=432086&d=1288709102
^you can under volt setirons kernel and disable overclocking with this app.
i find my battery life to be less than stock with this kernel, i need to see if it is a common issue, maybe because it is not a captivate kernel. but in the past with unhelpfuls kernel for 2.1 battery life was awesome.
spartan062984 said:
Interesting stuff...
I too would like to know if it is possible to simply under-volt. Does anyone know the optimal settings for SetCpu with the Captivate...or does it vary depending on each users profile/ phones?
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It's going to depend on the individual CPU in your phone. Your best result is to start at a given clock speed and begin lowering voltage in the smallest step possible, test for stability, repeat until you begin to notice instability (or you just run out of voltage options). You can just undervolt without increasing clock speed any, or you can not undervolt yet raise clock speed, or you can overclock and undervolt, depending on how your particular chip reacts. Some might need additional voltage to stabilize the snapdragon at 1.2Ghz while others (mine for example) is stable Able @ -100mV and 1.2Ghz. Overclocking silicon is the ultimate in YMMV.
Another thing to bear in mind is that increasing clock speed necessarily increases power consumption. There is no way around this. So a chip at 1.2Ghz will use more juice than 1Ghz even with the same voltage. It's difficult to say at this point whether, say, the Snapdragon @ 1.2Ghz and -100mV uses more or less power than the same chip @1Ghz and stock voltage. It's absolutely possible that the former uses more power, which would explain why you see at least one claim here of battery life decreasing even when voltage settings are left untouched.
hawkeyefan said:
It's going to depend on the individual CPU in your phone. Your best result is to start at a given clock speed and begin lowering voltage in the smallest step possible, test for stability, repeat until you begin to notice instability (or you just run out of voltage options). You can just undervolt without increasing clock speed any, or you can not undervolt yet raise clock speed, or you can overclock and undervolt, depending on how your particular chip reacts. Some might need additional voltage to stabilize the snapdragon at 1.2Ghz while others (mine for example) is stable Able @ -100mV and 1.2Ghz. Overclocking silicon is the ultimate in YMMV.
Another thing to bear in mind is that increasing clock speed necessarily increases power consumption. There is no way around this. So a chip at 1.2Ghz will use more juice than 1Ghz even with the same voltage. It's difficult to say at this point whether, say, the Snapdragon @ 1.2Ghz and -100mV uses more or less power than the same chip @1Ghz and stock voltage. It's absolutely possible that the former uses more power, which would explain why you see at least one claim here of battery life decreasing even when voltage settings are left untouched.
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Thanks for clarifying Hawkeye! I will report back on in a few days once i have tested out a few profiles. In my opinion, I feel that it is best to leave Over-clocking at default and maximize battery utilization with setcpu. However, the thought of over-clocking the Dragon beast is VERY tempting. Who wouldn't? I will definitely check out the differences when playing games and such.
spartan062984 said:
Thanks for clarifying Hawkeye! I will report back on in a few days once i have tested out a few profiles. In my opinion, I feel that it is best to leave Over-clocking at default and maximize battery utilization with setcpu. However, the thought of over-clocking the Dragon beast is VERY tempting. Who wouldn't? I will definitely check out the differences when playing games and such.
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I have to tell you, I'm not personally very fond of SetCPU on this device, even though I paid for the app (ugh). With raspdeep's voltage control app and SetIron's OC/UV kernel, the CPU defaults to 1.2Ghz at stock voltage, which for a basic setup is fine. Voltage Control app is phenomenal for adjusting in increments of 25mv at a time...one setting is for high clocks (1Ghz - 1.2Ghz) and the other is for < 1Ghz. It's probably best actually to start with the lower clock setting in Voltage Control, as your phone will spend the lion's share of it's time at those clocks and so that is where you should see the most gain in battery life. My only gripe is that I can't get the boot settings to stick on the Captivate so I have to go in and adjust them each time I reboot the phone. no biggie there.
SetCPU, on the other hand, has caused me loads of problems in the past, including causing the phone not to wake up from sleep and just atrocious battery life, I assume from constantly polling the CPU clock to measure clock speed. I have not experienced any of that with Overclock Widget, but I also don't use any of the independent clockspeed controls in the app...basically it's just a widget to display clock speed the way I use it. Otherwise, Setiron's kernel gives the 200mhz overclock and I just let the Hummingbird deal with changing clocks on its own. Jmo, but it works for me with no resulting battery drain beyond the additional I expect as a result of the extra 200mhz.
edit: whoops, long day. hummingbird in my post from above, not snapdragon. I need a drinky poo.
hawkeyefan said:
I have to tell you, I'm not personally very fond of SetCPU on this device, even though I paid for the app (ugh). With raspdeep's voltage control app and SetIron's OC/UV kernel, the CPU defaults to 1.2Ghz at stock voltage, which for a basic setup is fine. Voltage Control app is phenomenal for adjusting in increments of 25mv at a time...one setting is for high clocks (1Ghz - 1.2Ghz) and the other is for < 1Ghz. It's probably best actually to start with the lower clock setting in Voltage Control, as your phone will spend the lion's share of it's time at those clocks and so that is where you should see the most gain in battery life. My only gripe is that I can't get the boot settings to stick on the Captivate so I have to go in and adjust them each time I reboot the phone. no biggie there.
SetCPU, on the other hand, has caused me loads of problems in the past, including causing the phone not to wake up from sleep and just atrocious battery life, I assume from constantly polling the CPU clock to measure clock speed. I have not experienced any of that with Overclock Widget, but I also don't use any of the independent clockspeed controls in the app...basically it's just a widget to display clock speed the way I use it. Otherwise, Setiron's kernel gives the 200mhz overclock and I just let the Hummingbird deal with changing clocks on its own. Jmo, but it works for me with no resulting battery drain beyond the additional I expect as a result of the extra 200mhz.
edit: whoops, long day. hummingbird in my post from above, not snapdragon. I need a drinky poo.
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LOL. No Worries. I myself made the same mistake. I thought something was odd with my post. SnapDragon...Hummingbird....Bulbasaur.....I knew what you meant. lol
Still not having any luck with the voltage control app. Ive tried flashing different roms to see if it would work. I undervolted it to 100/75 the first time i did it and now i cant change. Only a little worried
i guess there was an issue with the set on boot scripts not working. supposedly that is fixed, i dont know for sure though, i haven't updated.
From what I'm gathering, in order to undervolt, you must have a kernel to su pport that, for example Setirons.
I'm not necessarily interested in overclocking, as it performs well as is. Of course there are arguments that overclocking may ultimately harm the phone, and arguments that by the time that happens, you'd be ready for a new phone. In any event, if I start getting slower, I may interest in overclocking.
Does anyone know if dramatic improvement in battery performance with underclocking?
I've noticed quite a bit of a difference, just pretty difficult to tune it precisely. (Coming from a person who enjoys overclocking computers a little too much). I just wish there was an app that would test each frequency and then let you know which one failed (without having to manually set it).
Right so my phone can get pretty hot some times and I was just wondering if I undervolt it will it reduce the heat of my phone?
Also how much difference does UV actually show
It can't, because you can undervoltage not much or your phone won't be stable anymore.I think the easier way is to downclock your cpu speed.
likuku said:
It can help in term of technical, but in actually at the rate you can see the different of it.I don't think your phone will still stable or functional.
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That's really hard to understand what you're trying to say...
Sent from my HTC Sensation 4G using XDA App
likuku said:
It can't, because you can undervoltage not much or your phone won't be stable anymore.I think the easier way is to downclock your cpu speed.
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Galaxa12 said:
That's really hard to understand what you're trying to say...
Sent from my HTC Sensation 4G using XDA App
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He means that you can use an app like SetCPU to underclock or lower the clock frequency of your phones CPU, this will leave you a slower but cooler phone.
yes, if you undervolt you reduce cpu "power consuption" as equally as how many volt you decrese.. but.. if you undervolt too much, you lose cpu stability, so, if you undervolt you have to underclock, the same for overclock, if you overclock you may overvolt
it's different for all peoples, some users could have a better cpu (with less impurity), it can be overcloccked better with less overvolt, some can have a bad cpu chip, it means they have to overvolt so much for a little overclock
i have a sensation normally with -75mV undervolt and stock clock, it's stabe, so, am i lucky?
Temperature is a function of voltage + clockspeed. It is recommended you stay at 1.2ghz for good balance b/w performance, temp, and battery consumption.
To easily find your optimal voltage threshold, globally undervolt in stages of 12.5mv until your phone because unstable. Then increase it by 1 stage and that is the optimal voltage your phone should be running at.
Of course you can even go as far as tweak voltages at different clock speeds. Usually there is much more room to UV the lower clocks (192 and 384mhz around 800 or 812.5mv) than the higher clocks.
Hope this helps
iba21 said:
yes, if you undervolt you reduce cpu "power consuption" as equally as how many volt you decrese.. but.. if you undervolt too much, you lose cpu stability, so, if you undervolt you have to underclock, the same for overclock, if you overclock you may overvolt
it's different for all peoples, some users could have a better cpu (with less impurity), it can be overcloccked better with less overvolt, some can have a bad cpu chip, it means they have to overvolt so much for a little overclock
i have a sensation normally with -75mV undervolt and stock clock, it's stabe, so, am i lucky?
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Getting a Poco x3 pro soon and thinking about undervolting could you add me on discord and help me? If so add Gokn#4488
Just a little question, i have a x10 mini pro, and its processor runs at 600 Mhz.
Now with the Mini CM7 i can overclock it to 864 Mhz. So i've been testing it with 724 Mhz and my question is: if i set the maximum processor speed at 724 Mhz, and leave it like that permanently, would this affect my cellphone in some way?
What i'm trying to say is, if you set a maximum speed, it doesn't means that the processor is gonna be running at that speed all the time, just when is needed, for example in games so it won't increase noticeably the battery consumption if the phone is locked 85% of the time. Or it is actually draining more battery even if don't use it?
PS. (English is not my native language, so i'm sorry if the text is hard to undestand, tried my best to explain it well).
You do know the hazards of overclocking in general right? Unless you have the proper cooling, even on a cellphone you will eventually burn out the processor. That is the real issue you need to worry about, just because you can overclock does not mean that you should overclock.
I wouldn't overclock it to the max. That's just bad juju. Unless you plan on hooking up a perpetual ice pack to the phone as well. You'd do well to be a bit moderate.
And to answer your question, yes you will burn battery quicker.
Test at different speeds. If it runs stable, with no force closes, lock-ups, reboots, excess heat, etc., then you're good. You are correct, you are only setting the maximum. What your phone idles or runs at on will depend on what governor you are using, I recommend Smartass for good battery and performance balance, although I have been liking Smartass v2 lately. Obviously overclocking will affect battery life, but you will find that your choice of governor will make a huge difference too.
Well, thanks for the help, glad to see that there are people who are willing to help with small questions like this one. Keep the good job!
This is my third time typing this... (This website should really have an auto-save draft feature)
I recently installed the application "CPU Tuner" because I've always wanted to utilize my newly rooted phone. The phone is running Cyanogenmod 7.2 Stable, and currently overclocked at 1.5GHz. My main concern is overclocking my phone that high. Now, I didn't really choose that option, SetCPU automatically set it to that when it loaded a configuration. I'm a beginner to overclocking, and this is my first time doing it for anything. I've heard rumors of people melting their processors from overclocking it, so I want to know if it's okay if its overclocked to roughly twice the stock frequency of 800MHz. If it IS safe, then why isn't the phone automatically set to 1GHz to compare to it's twin, the Evo 4G? Or perhaps even 1.2GHz to surpass it? I would definitely be satisfied with 1.2GHz, but I wouldn't mind having 1.5GHz if it was stable and didn't drain the battery. On to the next question, would an OC this high cause instability and/or would it drain my battery? I only overclocked an hour ago, so I haven't experienced any problems whatsoever... yet. On to the profiles... I'd like some suggestions for improving my triggers. Right now, it set everything up to the highest frequency, but looking at the help, it said to not touch the frequency, but experiment with thresholds. In the Help, it doesn't tell you what the thresholds are, and what they do, and more importantly, how they work. It just shows that the highest is the most battery saving. I would have thought the lower the better, but... Anyway, if you could tell me, I'd be highly appreciated it. Finally, the battery temperature... It has an option to enable a setting to change profiles if the battery gets a certain temperature, but I'd like to know what would be considered "Overheating". I get paranoid when the battery temperature gets a little warm at around 36 Celsius... but the profile it switches to is supposed to really slow down the CPU to preserve battery, so I'd really rather not use it unless it's necessary. So, would 45 - 50 Celsius do, or should I set it a bit lower? My battery is 4000+ mV, if that'd help at all. If you know any sources that you can direct me to that would answer my questions, it'd be highly appreciated.
Wow ok . Well first off check out THIS thread. It will explain a lot about Governors, I/O Schedulers, and a bunch of the questions you have. As for people melting CPUs, I've never actually seen it happen, or know anyone who has had it happen on the Shift. That's not to say it's not possible. It may be, just not probable. The Shift processor compared to the OG EVO's is much better. The Shift even at the stock 800mHz out performs the EVO's processor at 1000mHz. That is in part because it is a 2nd Gen processor vs the EVO's 1st Gen Unit. The Battery Temp should try and always be kept below 115-120 Degrees Fahrenheit. I use SetCPU, and have a Profile that kicks in to lower the OC to around Stock should the Battery Temp every reach 110 Degrees Fahrenheit. My setting are 61mHz Min 1516mHz Max, Smartass V2 Governor, and SIO Scheduler. But every device is different, so your going to have to do a bit of experimenting till you find what works for you. If you get a lot of Random Reboots, lower your Max OC setting, or try a different Governor. BTW where did you get a 4000mAh Battery?
prboy1969 said:
Wow ok . Well first off check out THIS thread. It will explain a lot about Governors, I/O Schedulers, and a bunch of the questions you have. As for people melting CPUs, I've never actually seen it happen, or know anyone who has had it happen on the Shift. That's not to say it's not possible. It may be, just not probable. The Shift processor compared to the OG EVO's is much better. The Shift even at the stock 800mHz out performs the EVO's processor at 1000mHz. That is in part because it is a 2nd Gen processor vs the EVO's 1st Gen Unit. The Battery Temp should try and always be kept below 115-120 Degrees Fahrenheit. I use SetCPU, and have a Profile that kicks in to lower the OC to around Stock should the Battery Temp every reach 110 Degrees Fahrenheit. My setting are 61mHz Min 1516mHz Max, Smartass V2 Governor, and SIO Scheduler. But every device is different, so your going to have to do a bit of experimenting till you find what works for you. If you get a lot of Random Reboots, lower your Max OC setting, or try a different Governor. BTW where did you get a 4000mAh Battery?
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Thanks for the response. It's pretty late, so I've bookmarked the link to read tomorrow. Alright, so 45 degrees Celsius should the maximum then. I've been thinking of switching over to SetCPU, since there are more comprehensive guides than for CPU Tuner (In which no one seems to have heard about), and it doesn't seem that the settings it set will be ideal for the long run. Although, before I switch over to SetCPU, I want to at least give it a shot. I'll change my settings so that the frequency decreases depending on battery level. Also, I don't have much but the basic governors and configurations on CPU Tuner, so I've never heard of Smartass V2 (Prior to skimming through the link you posted). Also, the battery came with it, I knew it seemed a bit different from most other batteries (From what I've seen in searches, most of them had around 2000), but I didn't know it meant that much.
The Governor settings available will depend on the Kernel, not on the CPU Controller. I've always been partial to SetCPU, but that's just me. I would again suggest doing a bit of reading, and experimentation to find your best settings. But defiantly the closer to normal the Battery temperature is the better. When the Battery heats up to much it will in most cases also drain faster. If you can post a Pic of the Battery I would really like to see it. I've never come across a 400mAh Battery for the Shift.
When I first rooted my shift 2 years ago I was very concerned of over-heating. I constantly checked the temperature. After a while I realized it is quite hard to over heat and cause damage, especially with the newest kernels the devs have put out. Just experiment with different settings and see what works best for your phone
Sent from my PG06100 using xda app-developers app
I see a lot of overclocked kernel editions, and I am wonder could someone explane me, except extensive battery draining, instabillity and overheating of device, what is and is there any crucial positive point of overclocked kernels ?
Overclocked kernels are simply kernels whose speed limit had been raised above the stock speed.
That increases perrormans dramatically as is visible by different benchmarks utilities.
You are correct to assume that higher clock would require some extra voltage and that the phone will get hotter. But it is not always noticeable and is mostly depentant on the configuration.
The cpu clock is not always at the highest possible. Different governors define what speed should the cpu be at any time. If there's a lot of work the cpuspeed would increase and if it idles a lot it would decrease.
I love 3 oc kernels, Sebastian's, bricked and faux. They all have different philosophies but all are excelent, do not overheat and save gather.compared to stock though they allow higher cpu freqs.
I suggest you create a nandroid backup and try some of.there kernels. Give it atleast two days.before you make up your mind about it, and try another if you wish, till you find the one that is right for you.
Sent from my HTC Sensation using xda premium
I agree. I never see the point of over clocking. I always limit my processor to 1.18 or even 1.13 and never have any problems with overheating or poor battery life!
I used overclock kernels for a long time on my gs2. Its nearly the same like with a desktop CPU. Every CPU had it's own work range, many CPUs a
are even able to work with higher frequency but lower voltage than standard. This causes in higher speed with lower power consumption!
all you need is a kernel which allows individual voltage settings for each speed which you can set with setcpu.
BUT my opinion is that even the gs2 with 1,2 GHz dual core was faster than any Android app had needed, so the gs3 at all!
ATM I've setted the max frequency in setcpu to 600 mhz and I can't see any lags or missing speed...
So I guess many people are more looking for benchmarking than real practical advantage..
but undervolting is a real great thing for power hungry smartphones!
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You all right guys. That is why I asked myself that question because there is hard to find modded kernels with default speeds and all new goodies, because I have noticed even I "limit" overclocked kernel in my Hypersensation CM7 Cyanogen Settings, it happens that some kernels from time to time speeds up to overclocked value, even in settings they were limited, and that impact widespread device causes instabillity ( and corrensponding unpleasent situations of forced battery pulling).
Last good kernel what I find for my CM7 ( I don't like ICS) is Bricked_XE-1.6.beta7 and with this release of CM7 it seems that kernel edition further development stops.It runs on 1526 Mhz and I allways wonder why shouldn't it run "out of the box" on default speed...
Does anyone have suggestion link, (because I couldn't find it )for any CM7 modded kernel with all new goodies, but running on default Sensation XE Mhz speed ?
i have been using overclocked Kernels for a while now and rarely have any problems, the phone is quick, very quick and the battery drain is really not that different and that is running it at 1.72 with both cores permanently on
tin2404 said:
[...] because I have noticed even I "limit" overclocked kernel in my Hypersensation CM7 Cyanogen Settings, it happens that some kernels from time to time speeds up to overclocked value
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This really should not happen. The maximum frequency for a governor is set through /sys pseudo-fs and (assuming the governor is not buggy) strictly followed. Maybe you have some leftover scripts somewhere messing with /sys?
tin2404 said:
( and corrensponding unpleasent situations of forced battery pulling).
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And this should -- like already pointed out -- only be the case under heavy load. Normally, a sensible governor will only set frequencies necessary to satisfy the current load.