Develop Bugs

Tegra 3 and SetCPU

Does using setCPU with the Tegra 3 and it's 5th core muck up the Tegra 3's native power saving capability (ie. using the fifth core as a low energy solution for minimal activities)?
Has anyone seen tests of battery use with and without?

What I have seen from my use over the past week or so with SetCPU is that you can set the governor and the minimum clock both of which have an effect (although minimum clock is not strictly adhered to).
I don't believe the 5th core is exposed to the android OS so SetCPU shouldn't effect that at all.

I'm testing the beta and no it does not effect the max 100% of the time the tegra power management seems to kick in. I have informed mike (setcpu author) about this issue he is looking in to it.
Sent from my HTC One X using xda premium

I guess set cpu is not supported quad core yet

As James pointed out, the 5th Slave core is Transparent and not visible to Android, so it 'shouldn't' be effected by SetCpu

nibbleart said:
I guess set cpu is not supported quad core yet
Click to expand...
Click to collapse
It supports quad core CPU scaling, the question is about the 5th core.
That the 5th core is invisible does make it seem like it wouldn't effect this issue, however I would like to understand a bit more about how it works to be sure.
From what I understand, when processor use is low and the CPU is scaled below 500mhz(?) then the 5th core alone is used, whereas at higher frequencies the other 4 cores are fully engaged.
I would just be worried that setting the CPU speed through methods other than whatever method HTC/nvidia had arranged for might negate this benefit. It'd be good to know from the setCPU guy what's going on, since he likely understands a lot about how CPU scaling works...

Here's my Feedback on using SetCPU with HOX:
When trying to underclock my phone
Max: 1000 Min:51
Result: rebooted within 5 minutes and then kept on doing this untill I reset the SetCpu settings to phone defaults and uninstalled
similar user experience here: http://forum.xda-developers.com/showthread.php?t=1596992&highlight=setcpu
I have seen that there is an app created for the HOX:
CoreControl: http://forum.xda-developers.com/showthread.php?t=1652136
I want to give this a go and I feel this a relevant topic to be stickied maybe under a different Topic Title ie. Custom CPU settings
Will install CoreControl and revert...
BTW: what settings have you tried using with SetCPU to underclock that doesnt result in a random reboot and that works, also what version of setCpu are you using

system tuner will allow to set the clocks for T3 properly

CoreControl is for enable/disable cores, not for overclock/underclock, I've been using it for a while, at least my HOX doesn't heat up much
Sent from my HTC One X using xda premium

Man it would be nice top have core control on the thrill
Sent from my LG-P920 using XDA

CoreControl Feedback
vegasphinx said:
CoreControl is for enable/disable cores, not for overclock/underclock, I've been using it for a while, at least my HOX doesn't heat up much
Sent from my HTC One X using xda premium
Click to expand...
Click to collapse
I can now concur with @vegasphinx it doesn't heat up as much and I dont notice the difference besides the toastie popping up every so often saying CoreControl has been granted SU
can any of you give me an idea how to setup the Battery Stats within CoreControl

It crashes because there's no kernal that supports overclock/underclock.
Sent from my HTC One X using Tapatalk 2

[Q] SetCPU - Extra Info?

Hi there, thinking about getting SetCPU - I have some questions before I do because I hear it can be dangerous?
- I've heard it can brick your phone?
- What if you set it too high?
- Do you personally have to monitor it?
- What are the benefits?
- Use alot of battery?
- Is it really worth using?
- Is it optimized for different phones - example the One X?
Thanks guys!

JDBurnie said:
Hi there, thinking about getting SetCPU - I have some questions before I do because I hear it can be dangerous?
- I've heard it can brick your phone?
- What if you set it too high?
- Do you personally have to monitor it?
- What are the benefits?
- Use alot of battery?
- Is it really worth using?
- Is it optimized for different phones - example the One X?
Thanks guys!
Click to expand...
Click to collapse
Hi, i have read that SetCPU cannot view all the cores i have read alot saying that System Tuner works fine you might want to try that.
I used to use SetCPU on my sensation and never hand any issues with it i did not monitor the app at all
Benefits allows overclocking if available in kernel
it can be overclocked and cause some issues such as overheating but if set correctly will be fine doesnt use much battery if any
and no i dont think you can brick your phone
if you set it too high i believe i had to reflash rom nothing major
BTW this is based on my own knowledge and usage
Hope this helps

Thanks man

JDBurnie said:
Thanks man
Click to expand...
Click to collapse
How much battery life can you save using setCPU?

lamenramen said:
How much battery life can you save using setCPU?
Click to expand...
Click to collapse
None in theory, if the CPU is slower it takes longer to go from
idle - process - idle
Faster speeds allow it to get it over and done with faster and get back to idle.
Of course it will at times stop the CPU going higher than it needs too which could save battery.
Under volting will save more batter then underclocking ever will.
Sent from my HTC One X using xda premium

SetCPU can not see Tegra 3 yet
Use System Tuner and its free

hamdir said:
SetCPU can not see Tegra 3 yet
Use System Tuner and its free
Click to expand...
Click to collapse
Thanks. I have system tuner, but what do I need to do in order to improve battery life?
I have set the governor to powersave. Is there anything else? How would I undervolt using this app?

lamenramen said:
Thanks. I have system tuner, but what do I need to do in order to improve battery life?
I have set the governor to powersave. Is there anything else? How would I undervolt using this app?
Click to expand...
Click to collapse
undervolting requires your phones kernel to support it, currently on these forums there is only one that does but i haven't tested it, sticking firm to the "stock kernel is best" and will do untill the kernels have more time to mature.
you could limit your max speed to 1 GHz, if you are rooted you can use Core control to turn off cores and run your phone as a dual core.

treebill said:
undervolting requires your phones kernel to support it, currently on these forums there is only one that does but i haven't tested it, sticking firm to the "stock kernel is best" and will do untill the kernels have more time to mature.
you could limit your max speed to 1 GHz, if you are rooted you can use Core control to turn off cores and run your phone as a dual core.
Click to expand...
Click to collapse
Not to be lazy, but would running the phone as dual core and limiting it to 1 ghz result in a perceptible battery savings? I'm trying to get a feel for how much I should expect custom ROMs to make my One X perform up to par. Thus far, I've installed two custom ROMs and felt like the improvements were all safely in the minor category.
I did install cyanogenmod 7 on a phone last year wow, that resulted in major benefits.

lamenramen said:
Not to be lazy, but would running the phone as dual core and limiting it to 1 ghz result in a perceptible battery savings? I'm trying to get a feel for how much I should expect custom ROMs to make my One X perform up to par. Thus far, I've installed two custom ROMs and felt like the improvements were all safely in the minor category.
I did install cyanogenmod 7 on a phone last year wow, that resulted in major benefits.
Click to expand...
Click to collapse
Running on 2 cores stops the phone from using and 2 cores uses less power then 4, playing games and using all cores is over kill 2 cores will run the game without lag use less power and make less heat.
You'll maybe get 10% from doing that but I haven't tested.
Really the only time any of this saves battery is during demanding programs, tegrea has a super low power companion core, for all your power saving needs.
Sent from my HTC One X using xda premium

I tried conservative governor while downloading sd files for Nova3 gave execllent results
I strongly advice not to undervolt tegra3
t3 is not like any other chip and UV or OC should not be attempted
OC because the chip is already at the max of its thermals
UV for the same reason n might end up with problems like flicker
changing governors and UC should be enough

Undervolting CPU - More battery...

Is it worth it?
How do I go about testing the stability of the phone ( I don't want to reduce clock speed )

If you want your phone to work perfectly without loosing speed it's not worth it ( change wouldn't be noticeable )

Fears said:
If you want your phone to work perfectly without loosing speed it's not worth it ( change wouldn't be noticeable )
Click to expand...
Click to collapse
Does undervolting really lower performance? You're sure you're not thinking about under clocking?
Sent from my HTC One X using Tapatalk 2

ben-fisher-bro said:
Is it worth it?
How do I go about testing the stability of the phone ( I don't want to reduce clock speed )
Click to expand...
Click to collapse
I predict a "my HOX isn't working right, I blame HTC" thread shortly after you try this.
But really, what are your expected gains from doing this?

Tingelholm said:
Does undervolting really lower performance? You're sure you're not thinking about under clocking?
Sent from my HTC One X using Tapatalk 2
Click to expand...
Click to collapse
If you're not sure about what you are doing it won't lower performance it will probably result in a lot of crashing and error messages, I personally think it's not worth it for the amount of battery you could gain ( few minutes )

Fears said:
If you're not sure about what you are doing it won't lower performance it will probably result in a lot of crashing and error messages, I personally think it's not worth it for the amount of battery you could gain ( few minutes )
Click to expand...
Click to collapse
Well, I have had it undervolted with -150mv in a week or something and I haven't experienced any errors and crashes. I don't have it for the battery, but for the temps.
Sent from my HTC One X using Tapatalk 2

I've been under voting my s3 747m for over two weeks now, between 75 to 300mv lower, at 1.89 I'm running at 1200mv, although I'm only running it at 1.5.
To test it I use Stability Test app, on scaling for 3 hour runs, it will stress all frequencies.
If you find a crash you increase the voltage at that frequency, BUT, the best way to test it, instead of using scaling test, use the burn in one, but manually set your speed and let it stress test XX frequency for a long period, this Is where I found the most of my crashes.
This isn't an easy or a quick job, it'll require a good weekend of mucking around. I have all my speeds down to 5mv increments instead of the stock 25 the apps give you.
But so far, I don't get voltage related crashes, only the random KP caused by cm10 bugs.
If people are interested in the voltages for this phone I could post them
Sent from my SAMSUNG-SGH-I747 using xda premium

I'm uv @ 1137 and oc @ 1.6 using arhd 9.1.0 faux 006u kernel and the phone is running better than ever
I use mhl hdmi with sixaxis and the battery used to die in a hour and it got really hot but now I played for a hour before work and it used 40% battery and it was warm but not overheating
But before u go playin around with things look into it all cores are different and behave different
This thread will tell u everything it even has a gragh on wot chips can do what
http://forum.xda-developers.com/showthread.php?t=1815466
Sent from my HTC One X using xda premium

Sent from my HTC One X using xda premium

How much is safe for overclocking?

I'm running Blackout v3.0, and it's running pretty smooth at first. But now my phone is stuffed with bunch of apps, making it running slower and slower. I want to keep those apps so I'm willing to overclock but I afraid of damaging my phone. So I would like to ask what's the safe overclocking frequency? I want the optimum frequency, fast enough and safe/stable.

ImjuzCY said:
I'm running Blackout v3.0, and it's running pretty smooth at first. But now my phone is stuffed with bunch of apps, making it running slower and slower. I want to keep those apps so I'm willing to overclock but I afraid of damaging my phone. So I would like to ask what's the safe overclocking frequency? I want the optimum frequency, fast enough and safe/stable.
Click to expand...
Click to collapse
Any overclocking can be unsafe as it can shorten the lifespan of your memory and CPU. But with that said I run mine at 1200 with no issues. Most people don't go higher than 1600 but anything 1400 or lower is not going to burn it up too quick IMO. Everyones hardware will react differently though.
Sent from my Inspire 4G using xda app-developers app

They usually say phone will get damaged, but I think its a myth. You can go up to 1600. After that it will get unstable.
Sent from my Inspire 4G

ImjuzCY said:
I'm running Blackout v3.0, and it's running pretty smooth at first. But now my phone is stuffed with bunch of apps, making it running slower and slower. I want to keep those apps so I'm willing to overclock but I afraid of damaging my phone. So I would like to ask what's the safe overclocking frequency? I want the optimum frequency, fast enough and safe/stable.
Click to expand...
Click to collapse
I run IceColdSandwich and have found 1459MHz to be the best combo of performance and stability on my phone. Every phone handles OCing a little differently, some can reportedly take over 1600 without a flinch and others will lock regularly with even a slight OC. Just experiment with the "set at boot" option turned off until you find something that works reliably on your phone.

Is it true you guys aren't seeing ill effects on your battery by overclocking like that?
Sent from my HTC Desire HD using Tapatalk 2

asif9t9 said:
Is it true you guys aren't seeing ill effects on your battery by overclocking like that?
Sent from my HTC Desire HD using Tapatalk 2
Click to expand...
Click to collapse
I think OC can affect battery drain only if you use an application which utilizes a full cpu load. But, if you're using this app in normal mode, economy will not be great also. So, when you using your phone for calling or general usage you will not see any problems with battery discharge.
I'm using DHD with Blackout v3.0 and I set 1200Mhz for maximum cpu value. I have no problems, phone is stable. Some time ago I used Leedroid ROM and set also 1200Mhz, but phone was rebooted by itself very often. More than twice a day.
You should try to use OC, as someone said above, without "set on boot" option. I think there is no danger for hardware up to 1600Mhz.

asif9t9 said:
Is it true you guys aren't seeing ill effects on your battery by overclocking like that?
Click to expand...
Click to collapse
Not under normal use. There's a school of thought that says even though the increased speed requires more power, it can also finish tasks and go back to sleep faster, so it ends up being a wash. I've overclocked all three smartphones I've owned to date and haven't experienced any significant difference in battery life.

ai6908 said:
They usually say phone will get damaged, but I think its a myth. You can go up to 1600. After that it will get unstable.
Sent from my Inspire 4G
Click to expand...
Click to collapse
They say that as a precautionary measure just as they say flashing a custom ROM can be dangerous. For people who don't know what they're doing. But precaution aside, just like you said you can go up to 1600 MHz safely on this phone. I know every phone behaves differently but on average no one has issues upto that frequency. But above that frequency the phone might be unstable. The CPU will be drawing much more power at high frequencies and will heat up more. The CPU heating up too much and too frequently reduces the life of the CPU. So it's not a myth.
Sent from my Desire HD using xda premium

2ghz.... the phone is old now. Make it bleed.
Sent from my Desire HD

Don't try to Cross above 1600.

Undervolting Damage?

Can undervolting, in any way, make ure phone heat up more or loose more battery?
/==(CyberScopes)==\

I undervolted 50mV and my phone is still okay

Wats the best undervolting level?
/==(CyberScopes)==\

I don't think it will damege the hardware, but the software may not boot due to the CPU not having enough energy to process all the bits of data there for having to restore a nandroid or ftf. But I don't know about a safe voltege as I am on a stock kernel and locked bootloader
Sent from my GBTweaked v7.1 r800x using Tapatalk 2

Doomlord said -100mv is stable for him. But I not dare so I go till -50mV

If i try undervolting, my battery life goes to hell.
Its different from phone to phone.
Sent from my R800i using xda app-developers app

Ive got -100mv and i cant tell if its givin more or less batt.
/==(CyberScopes)==\

Undervolting will never harm the phone, though it may prevent it from booting (if the undervolt is set on boot), or make the phone sporadically freeze/reboot. Some frequencies can undervolt more than others, and each phone's tolerance will vary as well. I've been able to go down -225mV on the 1024MHz frequency (or even -250mV on 1017MHz), though that's the farthest any of them has gone.

Yeah I've heard of overclocking causing damage, but never undervolting. It may cause some issues, but actual damage? I don't think so.

-Undervolting should GAIN BATTERY.
-Going too low might make your device freeze or not boot.
-Because of the way that you are actually taking away the energy this actually makes the phone slightly cooler.
- I myself don't like messing up with the voltages, there shouldn't be a very huge battery difference (Only about 1-6%) and I prefer stability.
-If you are still thinking of doing so then use a CPU stress app and test on every single step that you go down by for at least 20 minutes.
Sent from my R800i using xda app-developers app

Anybody know any good undervoltages for 1.6ghz overclock? I need to overclock this high to get my games going.

chery2k said:
Anybody know any good undervoltages for 1.6ghz overclock? I need to overclock this high to get my games going.
Click to expand...
Click to collapse
I'm able to set 1.6GHz to 1200mV stable, but it varies from phone to phone. (1200mV is the same as stock 1GHz voltage btw )

is undervolting really necessary?

CyberScopes said:
is undervolting really necessary?
Click to expand...
Click to collapse
No as I earlier explained it only saves about 5% battery and heat.
Sent from my Xperia Play using xda app-developers app

sewer56lol said:
-Undervolting should GAIN BATTERY.
Click to expand...
Click to collapse
That's what you want it to do, and that is the usual result of moderate undervolting, but that is not always the result.
The phone checks itself (similar to parity checks). Excessive undervolt can make the phone cpu do the same thing over and over until it comes out right

electricpete1 said:
That's what you want it to do, and that is the usual result of moderate undervolting, but that is not always the result.
The phone checks itself (similar to parity checks). Excessive undervolt can make the phone cpu do the same thing over and over until it comes out right
Click to expand...
Click to collapse
undervolted -100 my HTC desire HD. Phone got rather hot.
Switched back immediatelly...
Why's that?

Odp: Undervolting Damage?
cimdahers said:
undervolted -100 my HTC desire HD. Phone got rather hot.
Switched back immediatelly...
Why's that?
Click to expand...
Click to collapse
It could have happened because your phone has gone to the highest possible frequency, I'm not sure about it though.
How do I change the voltage in android without having to edit the kernel?
Wysłane z mojego R800i za pomocą xda premium

I agree that the safest level of undervolting is -50 or even -75 but anything beyond -100 would make the device restart when it hits the min clock speed.

Can somebody give me tutorial how to undervolting custom kernel? When using/try doomkernel n lupus still can't see a chance to uv. N i don't want to use setxperia.
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