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call me a noob but i gotta ask, just what does the kernals do to the phone thats so special, and all the ghz talk means what. i rooted my device for the teather and customizing, and now i see all this talk of kernal this, overclock that, and different ghz people are getting can someone explain to me what this does for your phone, should i be interested???
popcorn kernals?
the higher your ghz the faster your phone is.
overclocking is making your ghz higher
and kernals is what allows you to overclock(sorta)
lol dude...you should prob. take your time with customization but ghz is in reference to the speed of the processor. So...theoretically the higher the number the better your phone should perform...t, eoretically lol. Note that with a higher ghz value the worse your battery life will be unless the kernel is written really well. Also the kernel is the code that controls the devices hardware. (brain)
The nice thing is that you can generally play with different kernels without having to wipe and redo your phone. Also, if you really want to play with the various kernels out there you should get setcpu from the market. It let's you set your phone to make use of the processor in an over clocked (OC) application but it can also let you under clock your phone when your not using it, such as when the screen is off. This will help you conserve battery life. But be careful, over clocking can lead to over heating and other problems if you''re not careful
sounds very interesting, hmmm. so in the coming months people could create kernals to acheive speeds to challenge dual core phones
the kernels already are challenging dual core phones. The thunderbolt currently has a 2ghz kernel. The motorola atrix is a 1 ghz dual core... Thunderbolt definately rivals it with overclock kernel
Sent from my ADR6400L using XDA App
A "kernel" is the OS layer that sits between the applications and hardware. So, when an application says "light up LED" it eventually goes through the kernel to do this, most likely by a request/system call.
The speed of a CPU is measured in hertz (frequency). So, a 1 Ghz CPU can perform over 1 billion operations in one second. The frequency can be increased (overclocked). When you do so, this can damage the CPU (most likely due to heat). Heat can also cause the CPU to run efficiently. So, if you overclock too high, you COULD end up running slower than if you had just left it at 1 Ghz. Changing the frequency can also hinder stability.
so with it being so dangerous how do u know what kernal to trust and whats a safe limit in hertz, do u stop at 1.5, because 2ghz sounds like pushing it
This thread is so full of misinformation it is comical. To start, higher clock speed does not always result in better performance.
Secondly, everyone has their own preference. The best bet is to find the perfect balance for your needs. For many people, overclocking the CPU is not very beneficial... since the device is already plenty fast at stock 1GHz speeds. A lot of users would rather use custom kernels to make their device more power efficient and use SMARTASS governors and lower voltages.
Mess around with kernels and see what you like the best! (always remember to create a backup before flashing... this allows you to easily revert back if something goes awry).
You mean they're not popcorn kernels?? Lol
bmcclure937 said:
This thread is so full of misinformation it is comical. To start, higher clock speed does not always result in better performance.
Secondly, everyone has their own preference. The best bet is to find the perfect balance for your needs. For many people, overclocking the CPU is not very beneficial... since the device is already plenty fast at stock 1GHz speeds. A lot of users would rather use custom kernels to make their device more power efficient and use SMARTASS governors and lower voltages.
Mess around with kernels and see what you like the best! (always remember to create a backup before flashing... this allows you to easily revert back if something goes awry).
Click to expand...
Click to collapse
Very well written and informative post, thanks brah!
skinien said:
A "kernel" is the OS layer that sits between the applications and hardware. So, when an application says "light up LED" it eventually goes through the kernel to do this, most likely by a request/system call.
The speed of a CPU is measured in hertz (frequency). So, a 1 Ghz CPU can perform over 1 billion operations in one second. The frequency can be increased (overclocked). When you do so, this can damage the CPU (most likely due to heat). Heat can also cause the CPU to run efficiently. So, if you overclock too high, you COULD end up running slower than if you had just left it at 1 Ghz. Changing the frequency can also hinder stability.
Click to expand...
Click to collapse
+1 ninja point for correctly saying "over 1 billion"
Sent from my ADR6400L using XDA App
It should be noted that most phones are definitely capable of being overclocked to a reasonable extent.
the majority of kernels we nexus one users play with, is undervolting the and playing with teh voltage tables to maximize standby battery life, at the same time overclocking the high end to improve performance. but really its about lowering voltage to improve battery life.
Hi... I have rooted my Samsung GS2 and payed for the OC app TEGRAK ..
But every time I go over 1400mhz the phone gets very unstable.
It even feezes at 1400 mhz when i use my navigon app...
I have tested it at 1500 mhz.. But reboots in a kind of save mode.,,,
At 1400mhz i runs Quadrant smooth with 4200 in score
And 56 MFLOPS in Linpack
But why is my phone so unstalbe?
But why is my phone so unstalbe?
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Click to collapse
Because it's supposed to run at 1.2Ghz.
If every SGS2 was able to run at 1.4Ghz without any issue I guess Samsung would have set them at 1.4Ghz by default (since battery life is obviously the least of their concerns ^^). When CPUs are produced, there's always variations in quality. what usually happens on x86 CPUs is that they're tested, sorted according to their max stable frequency, and then sold under different names and at different prices. For Exynos my guess is that any CPU that fails to pass the 1.2Ghz bar is just ditched, and they keep the others, some of which will work at 1.4Ghz, whereas some won't.
Now if you want to gain more stability, you can always try to increase the voltage, it usually gets more stable as voltage increases, but it also gets hotter (which can cause it to crash, or may even permanently damage the processor).
BlueScreenJunky said:
Because it's supposed to run at 1.2Ghz.
If every SGS2 was able to run at 1.4Ghz without any issue I guess Samsung would have set them at 1.4Ghz by default (since battery life is obviously the least of their concerns ^^). When CPUs are produced, there's always variations in quality. what usually happens on x86 CPUs is that they're tested, sorted according to their max stable frequency, and then sold under different names and at different prices. For Exynos my guess is that any CPU that fails to pass the 1.2Ghz bar is just ditched, and they keep the others, some of which will work at 1.4Ghz, whereas some won't.
Now if you want to gain more stability, you can always try to increase the voltage, it usually gets more stable as voltage increases, but it also gets hotter (which can cause it to crash, or may even permanently damage the processor).
Click to expand...
Click to collapse
At 1.4ghz the phone will also get hotter and it decreases the lifetime if you run 24/7 at 1.4ghz
Ok.. I know about the x86 cpu's.. But didn't think it was the same in ARM cpu's-
But I see ALOT SGS2 that runs 1800mhz..
I guess that I just have one of the not so OC lilkes...
Overclocking won't always work for everyone at same levels.
I've also seen evidence to suggest that OCing significantly reduces the life of the SGS2. Nobnut had his phone vastly overheating even on stock speeds, and constantly rebooting... He overclocked. A number of others reported similar.
Overclocking is not simple and it is not that you just click on 1400/1500 MHz and you are Overclocked. A lot of things matter here. When we overclock in our Desktops then we have to test it very thoroughly, setting up the right VCore, Bus voltage, Multiplier, checking the stability and temperature etc. etc. Tegrak OC is a nice and simple software to use, but it can't be perfect when you can't set all the settings manually other that just higher the clock rate. Personally I'd always stay with stock speed as incorrect OC could harm my CPU and GPU.
Regards.
If you know anything about overclocking then you'll understand that there are a variety of factors that affect the overclocking of a system. The overclock headroom you get from a processor varies, add to that the variables in component tolerance in the circuit board and you have a huge variety of factors that can limit the maximum frequency that you can overclock your system to.
I'll give you an example using my computers. Click on the images below:
Both processor overclock similarly on using the same components and that was the maximum I could get out of them. Now when I bought an EVGA X58 Classified motherboard and overclocked the Xeon W3520 I got it up to 4704 MHz with less vCore and less CPU VTT. All of this was done with aircooling.
My point is that not all systems will overclock the same even though they share the same model components.
I just bought a Craig cmp741e Android tablet. On the box, it says it has 1.3Ghz cpu. I rooted it. I installed System Info app, it shows my cpu can reach up to 1.3Ghz. I installed multiple overclock app, like cpu tuner, system tuner pro, etc. They all said that my cpu was set at 1Ghz originally. When I try to "overclock" even above 1.2Ghz, os crashes. How come a 1.3Ghz cpu crashes at 1.2Ghz? And how did the manufacturer rom lock a cpu at 1.0ghz? Any way to fix it?
Thanks.
just sell it and buy a new one...
Only way to "fix" it would be to install a custom kernel that has those frequencies. Off brand companies like that aren't really regulated that much. They can make pretty much any claim they want. Most people buying these things have no idea to even look for something like that or care to. The manufacturer will just chalk it up as trying to get better battery life. As far as it crashing, it might not actually be able to run at 1200. There's always certain "steps" or frequencies devices work with and setting random ones might interfere with some other processes. They also might have another script/app/process that regulates it and doesn't allow you to mod it.
after waiting impatiently for the arrival of your op2 , many are disappointed with the low battery standby....specially if you are using LTE.
issues :
1) even having such a large battery, getting poor battery life.
2) even if the phone is idle, battery drains :crying:
so after having it for almost 2 weeks, i have learned most of the cpu tuner and battery saving apps wont work with op2, its not because of software, basically snapdragon 810's big little architecture is new and apps in the market are not compatible with this octacore new chipset.
and because of very less manufacturers are using this SOC as we now know why... and they were right... it heats up a lot!!! so app developers have not concentrated an specific app for this SOC.
so after lots of mix and matches, finally have come up with a stable solution as follows :
a) your phone should be rooted.
b) install 3c cpu manager from playstore.
c) open minimum 6 apps in background maximum the better.
( remember if no apps are running in background then cpu manager will show only maximum 1.555 ghz. max frequency and 384 mhz low frequency single setup only and big little architecture dual setup wont be shown ie: 810 has 4 cores running @ 1.555 ghz max and other 4 cores @ 1.76 ghz max. and both setups at 384 mhz minimum. )
d) open cpu manager, there should be 2 different setups, if not then open more apps in background, simply change the governor to ON-DEMAND, from interactive and set it on and reboot, as i have noticed with interactive governor even during standby, processor does not stays idle at lower frequencies.
after changing the governor, i have noticed that during standby cpu frequencies are in idle or at the lowest. which highly improvises the battery standby life and haven't noticed any performance degradation.
you can even limit the higher cores frequencies from 1.76 ghz to 1.55 ghz... improving up-to some limit of over heating issues and better standby time.
these are just the findings i discovered with my phone, so don't blame me if anything goes wrong, do it at your own risk.
buntybauva said:
after waiting impatiently for the arrival of your op2 , many are disappointed with the low battery standby....specially if you are using LTE.
issues :
1) even having such a large battery, getting poor battery life.
2) even if the phone is idle, battery drains :crying:
so after having it for almost 2 weeks, i have learned most of the cpu tuner and battery saving apps wont work with op2, its not because of software, basically snapdragon 810's big little architecture is new and apps in the market are not compatible with this octacore new chipset.
and because of very less manufacturers are using this SOC as we now know why... and they were right... it heats up a lot!!! so app developers have not concentrated an specific app for this SOC.
so after lots of mix and matches, finally have come up with a stable solution as follows :
a) your phone should be rooted.
b) install 3c cpu manager from playstore.
c) open minimum 6 apps in background maximum the better.
( remember if no apps are running in background then cpu manager will show only maximum 1.555 ghz. max frequency and 384 mhz low frequency single setup only and big little architecture dual setup wont be shown ie: 810 has 4 cores running @ 1.555 ghz max and other 4 cores @ 1.76 ghz max. and both setups at 384 mhz minimum. )
d) open cpu manager, there should be 2 different setups, if not then open more apps in background, simply change the governor to ON-DEMAND, from interactive and set it on and reboot, as i have noticed with interactive governor even during standby, processor does not stays idle at lower frequencies.
after changing the governor, i have noticed that during standby cpu frequencies are in idle or at the lowest. which highly improvises the battery standby life and haven't noticed any performance degradation.
you can even limit the higher cores frequencies from 1.76 ghz to 1.55 ghz... improving up-to some limit of over heating issues and better standby time.
these are just the findings i discovered with my phone, so don't blame me if anything goes wrong, do it at your own risk.
Click to expand...
Click to collapse
This has nothing to do with apps, just poor drivers on the kernel side, scheduler isn't properly coded for this SoC, and the fact that there is no dynamic hotplugging options available without causing the phone to reboot under certain circumstances doesn't benefit us any. Check out some of the custom kernels, as they may increase your idle battery life, on my own kernel I saw .5% drain per hour max. For reference I saw about 20 hours idle and sitting at 89% on my kernel.
DespairFactor said:
This has nothing to do with apps, just poor drivers on the kernel side, scheduler isn't properly coded for this SoC, and the fact that there is no dynamic hotplugging options available without causing the phone to reboot under certain circumstances doesn't benefit us any. Check out some of the custom kernels, as they may increase your idle battery life, on my own kernel I saw .5% drain per hour max. For reference I saw about 20 hours idle and sitting at 89% on my kernel.
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i really appreciate your findings with the kernel, but my post is intended for people like me who does not wants to mess up with a stock kernel, so that future OTA updates can be patched without much hassle.
as you see, oxygen os is quite new and incomplete when compared with other's have to offer. so i expect lots of future updates immediately by the OP to improve and stabilize the OS.
I am giving snapdragon battery guru a try, it's for Qualcomm processors. But I'm not very experienced in this stuff. I think it has helped but if someone with more experience wants to give it a try. Maybe they can shed some new light on this subject.
This is the result with on-demand governor settings when phone is idle. with stock kernel and stock frequencies.
Ondemand has always been my fvorite for all past phones. in op2 however it always reverts back to original after interactive. the best battery saver for any phone is swithching to 4.4.2. Azimg batteru life. unfortunately notpossble with op2
buntybauva said:
i really appreciate your findings with the kernel, but my post is intended for people like me who does not wants to mess up with a stock kernel, so that future OTA updates can be patched without much hassle.
as you see, oxygen os is quite new and incomplete when compared with other's have to offer. so i expect lots of future updates immediately by the OP to improve and stabilize the OS.
Click to expand...
Click to collapse
Being rooted alone will prevent OTA updates. You have to flash the full stock ROM when there's an update anyway which would overwrite the kernel.
Hey, I saw that all CPUs are currently locked down to 1593mhz. Our chip should have 2x1.5ghz for general use and 2x2.1ghz for high performance tasks.
But in stock as in custom Roms, I see all CPUs locked down, max freq 1593mhz and no control over queue processing, either from hotplug or CPU front. Is there something I missed? Or LG just lied to us?
I know from thermal point of view that our device would not be able to sustain 2.1ghz for a long time, but if the frequency is not even available, it is a serious matter... +500mhz is not something to overlook!
If thats true, thatd be a heartbreaking, the first thing I look to before choosing a device, is clock speed
Unlock the game optimization
I checked on cpu-z and frequencies. With optimization on, it won't go over 1,5 ghz but with that option off it is easily jumping to maximum clock speed (faster battery drain). Stock rom, don't know about custom roms.
Linux User said:
I checked on cpu-z and frequencies. With optimization on, it won't go over 1,5 ghz but with that option off it is easily jumping to maximum clock speed (faster battery drain). Stock rom, don't know about custom roms.
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Click to collapse
You mean game optimization in settings/battery? I think we do not have that option in custom ROMs (I am currently trying Aicp 12.1) and never changed it in stock. I will try going back to stock to disable that option and see if the frequency table changes... If it does, it will be a pre-requisite before flashing custom ROMs in our device. Still, it is something the kernel should handle.
I would underclock the device on my own, as I did with my good old G2, but not having the option for the CPUs to scale as intended is not cool...
Well, frequency table shows no change with stock, but somehow, CPUs 3 and 4 scale up to 2150mhz now.
I guess LG did not cheat in the strict sense of the word, but just does not want us to have control over our devices...
Sent from my LG-H850 using Tapatalk
Floodland said:
Hey, I saw that all CPUs are currently locked down to 1593mhz. Our chip should have 2x1.5ghz for general use and 2x2.1ghz for high performance tasks.
But in stock as in custom Roms, I see all CPUs locked down, max freq 1593mhz and no control over queue processing, either from hotplug or CPU front. Is there something I missed? Or LG just lied to us?
I know from thermal point of view that our device would not be able to sustain 2.1ghz for a long time, but if the frequency is not even available, it is a serious matter... +500mhz is not something to overlook!
Click to expand...
Click to collapse
So... I was freaked out after reading this thread, so i rushed to check using cpu Z and it turned out that mine is clocked at 2.15, so i don't know what is wrong u
The Snapdragon 820 inside the LG G5 has a quad-core processor which has 2 cores clocked at 2.15 GHz and two other cores clocked at 1.6 GHz (1593 MHz), it's the way the manufacturer (Qualcomm) decided the processor to be, the LG G5 is not underclocked. Some users may get different results in applications like CPU-Z or AnTuTu depending on which core the application is based on.
Android_420 said:
The Snapdragon 820 inside the LG G5 has a quad-core processor which has 2 cores clocked at 2.15 GHz and two other cores clocked at 1.6 GHz (1593 MHz), it's the way the manufacturer (Qualcomm) decided the processor to be, the LG G5 is not underclocked. Some users may get different results in applications like CPU-Z or AnTuTu depending on which core the application is based on.
Click to expand...
Click to collapse
The frequency table shown by kernel adiutor (or any kernel tweaking software) shows ranges 307-1593 for all processors.
I know the hardware behind, my first though was that LG underclocked it. Now I see the phone just hides its behavior and does not show the real table (or the available software is not able to see it).
We will need additional kernel development in order to effectively control the core speeds in our devices.
Case closed, thank you for the responses.
Floodland said:
The frequency table shown by kernel adiutor (or any kernel tweaking software) shows ranges 307-1593 for all processors.
I know the hardware behind, my first though was that LG underclocked it. Now I see the phone just hides its behavior and does not show the real table (or the available software is not able to see it).
We will need additional kernel development in order to effectively control the core speeds in our devices.
Case closed, thank you for the responses.
Click to expand...
Click to collapse
old versions of kernel auditor are buggy with the g5, they see it as a single quad core instead of big/little dual 2 cores. You need the newest kernel auditor.