Develop Bugs

[Q] [CyanogenMod7 RC4] Overclock and Performance Settings

Hi,
I've just noticed the Performance settings menu under the CyanogenMod Settings menu and I wanted to give overclock and other features a try...safely.
I'm looking for increasing my Wildfire's performance in a remarkable way but without harming or causing any trouble to the phone. So I'd like to start in a quite conservative way.
What governor should I choose? (default: smartass)
What max and min CPU frequency? (default 518 and 352 Mhz)
What about the VM heap size? (default 24m)
What do you guys use as your settings?
Thanks a lot!

Governor : Smartass
CPU Speeds : 264 Min, 652 Max
VM Heap Size : 32 M
Remember, don't expect miracles by OC'ing your CPU. You'll probably be disappointed.

Thanks for answering!
In the meanwhile I set up 264 as min and 691 as max...is that too much and potentially dangerous?
No miracles indeed but the phone felt a bit more snappy when playing games for example.
Do you know where I can find some info about the different governors?
Also, what is exactly the VM heap size?
Thank you!

No, wont harm it. Only if you experience instability, reduce it to the next (Or rather, Previous) level.
CPU Governors:
* ondemand – Available in most kernels, and the default governor in most kernels. When the CPU load reaches a certain point (see “up threshold” in Advanced Settings), ondemand will rapidly scale the CPU up to meet demand, then gradually scale the CPU down when it isn't needed.
* conservative – Available in some kernels. It is similar to the ondemand governor, but will scale the CPU up more gradually to better fit demand. Conservative provides a less responsive experience than ondemand, but can save battery.
* performance – Available in most kernels. It will keep the CPU running at the “max” set value at all times. This is a bit more efficient than simply setting “max” and “min” to the same value and using ondemand because the system will not waste resources scanning for CPU load.
* powersave – Available in some kernels. It will keep the CPU running at the “min” set value at all times.
* userspace – A method for controlling the CPU speed that isn't currently used by SetCPU. For best results, do not use the userspace governor.
(The above wall of text is lifted from SetCPU's site)
In addition to that , Smartass is really the smart one. When your screen is on, the minimum frequency will automatically be set to 518 MHz, making your phone seem it is flying, and, when the screen is off, then, it reverts back to the minimum set value, and saves battery - Best of both worlds!
As for VM Heap Size, it is the maximum amount of heap space (i.e. memory) a single instance of the Dalvik VM (application) can obtain. Technical concept, but, you can read it up more if you like.

Thanks a lot for the insigthful reply, everything's clearer now!

i put everything on max. but thats just me. phone works fine though :L

Hi,
What's the best setting for my battery? It drains so fast.
Mine is as following:
Min.: 245 Mhz
Max.: 537 Mhz
INTERACTIVE
I have to charge the Phone every evening, thats a bit annoying.
Thank you in advance

When using the cyanogenmod settings for the cpu speed,setcpu isn't required anymore right?
Sent from my HTC Wildfire using XDA App

FrydaeXIII said:
When using the cyanogenmod settings for the cpu speed,setcpu isn't required anymore right?
Sent from my HTC Wildfire using XDA App
Click to expand...
Click to collapse
Yes, you are right. Conflicting apps are never recommended.

thanks for the tip...

KISS-Kernel

excuse me; have question about this kernel; i couldn't post in the original thread;
by setting the min clock speed to 768MHZ & the max to 1407MHZ, How much voltage does it spend? by setting the min to 245MHZ & max to 1024MHZ how much? i overclocked to 1407MHZ , i saw more smoothness and speed; but i felt that its consuming more power!
is overclocking harmful to CPU? ( always overclocking )
Rom: MY One V RC4.0 FX
PrimoU GSM
Kernel: Latest Kiss Kernel

Hi
Political correct answer:
Of course OC "can" harm your device - like all OC´ing
Realistic answer:
Most One V devices can handle OCing up to 1.5 without problems
but since this may be specific to chip manifacturing there is no
guarantee that it is. Therefore before using any OC you should
test it very carefully.
And also - Of course running the chip at higher frequencies needs
more power. Simply physics .)
In "normal" daily use the difference is not big because the cpu will
not run at high frequencies most of the time. If you do things
like "heavy" gaming this is of course forcing the cpu to run faster.
To reduce the "effect" a little bit there is a kernel feature called
Undervolting (UV) with that you can reduce the voltage for
specific frequencies. Like OC this is device specific. So some
devices can run stable with more reduced voltage then others
BTW: why to you set the min frequency to 768?
This will limit that the frequency cannot go lower then that if the
device is idle. Running at 245 needs of course less power then 768
max

Thanks for the nice info, well, i heard that some users said that the best frequency for " My One V" rom:
Minimum: 768MHZ
MAX: 1407
I'm using "Set CPU" to OC
So setting the min frequency to 245MHZ will save more power, right?
Sent from my HTC One V using xda app-developers app

Satohiroshi said:
So setting the min frequency to 245MHZ will save more power, right?
Click to expand...
Click to collapse
Yes - especially for the time before the device can go into
"deep sleep" when beeing idle.
The only "disadvantage" is that depending on the govener that you use
there might be a small lag before the frequency scales up
Actually it depends if you notice it at all
If you use govener ondemand it should be no problem
if you use e.g. smartassV2 you might consider thinking about
using some tunables that will reduce that behaviour.
max

Thanks, yeah, i meant for normal activities, like checking Facebook,mail, watching movies ... So ondemand mode would be better
Sent from my HTC One V using xda app-developers app

maxwen said:
Yes - especially for the time before the device can go into
"deep sleep" when beeing idle.
The only "disadvantage" is that depending on the govener that you use
there might be a small lag before the frequency scales up
Actually it depends if you notice it at all
If you use govener ondemand it should be no problem
if you use e.g. smartassV2 you might consider thinking about
using some tunables that will reduce that behaviour.
max
Click to expand...
Click to collapse
What is your recommend governor to integrate with your Titanium-KISS kernel and what is your favourite I/O Scheduler tweaks, for daily use & heavy gaming?
I'm using smartassV2 & i set my I/O Scheduler to deadline until now, because it's peoples favourite
Should i change it to ondemmand to gain a better performance?

Hi
Actually there is already a lot of information about your question
in the KISS kernel thread.
Especially about how to tweak smartassV2 based on "profiles"
max

maxwen said:
Hi
Actually there is already a lot of information about your question
in the KISS kernel thread.
Especially about how to tweak smartassV2 based on "profiles"
max
Click to expand...
Click to collapse
uh, okay...i'll re-read the info once again :good:

[Q] ARHD with XM Kernel 1.3ghz default?

Hi i have ARHD on my phone with the XM Kernel. I was slightly suprised in the Trickster MOD app, the max clock speed is 1.3ghz. Yes i know i can OC to 1.5 but im not sure what is setting this. When i had ARHD installed with stock kernel it was showing 1.3 as default. I assume that was set by the ROM. But i installed this kernel and still has 1.3 as the default.
Also the default govenor settings for the gaming one has the boost_freq set at 1300000, which is 1.3ghz, that can be changed to 1.5 also. But surely the boost freq would be the max freq no matter if you move the slider to 1.5 in the basic controls? But i would be suprised that the gaming govenor would underclock the cpu, surely for gaming you would want the phone maxed out?
Is this expected with the XM Kernel and the ARHD? And if so, is there any things i can change in the govenor settings to make sure it performs at absolute max?

It's kernel related; Xmisters' kernels since 188 have a hard cap(1.3Ghz) by default, but using trickster mod, or another o/c apk, you can raise it to the stock 1.5Ghz(tick 'set on boot' to ensure it stays at 1.5) The best settings are trial and error, tbh, I use touchdemand/sio though smartmax seems to be the best balance.

Thanks for the answer. i can change it to 1.5 easy enough, but if you look in the govenor control, the boost_freq is is set to 1300000. If i left it at that, would it prevent the cpu from going up to 1.5?

Danw20 said:
Thanks for the answer. i can change it to 1.5 easy enough, but if you look in the govenor control, the boost_freq is is set to 1300000. If i left it at that, would it prevent the cpu from going up to 1.5?
Click to expand...
Click to collapse
you have sleep (lowest CPU can go), ideal freq(the speed the CPU aims for while awake), touch poke (when you touch the screen), boost (what it boosts too to prevent lag) and max (CPU flat out)
Setting the boost to 1.3 will still allow the could to run at full speed.
Sent from my HTC One X using xda app-developers app

That makes sense, cheers. So its probably a good idea to leave it as it is then.

[LG D855] CPU Frequency doesn't stick

Why doesn't the max cpu remain constant in kernel audiutor??
I have cm 13 and I have tried flashing the Nebula kernel, used their modded kernel audiutor app and max frequency doesn't stick, after I put it at 2457 MHz and try out a benchmark I would get sh**ty scores and go back to Kernel Audiutor app to find out that my new max frequency was 800 MHz (or another, max frequency was totally random) , why??? I tried flashing the 777 Kernel (maybe the kernel was the issue?) and got the same result! Cpu frequency changes after a while, am I doing something wrong? I have disabled hotplug cpu and the thermal to see if it was the case, didnt work... Any solution?

Settings > Battery > Set mode to performance - you can set this in kernel audiutor i believe (sorry my spelling is crap) but i'm not sure what section it's in.

Still doesn't work
I just tried your suggestion after a little bit of googling and finding this thread. What else could I try? I see my CPU change instantly after applying the changes ..... My phone is really lagging so that's why I need to change this stupid setting.

Is there a kernel for cpu underclock on oreo?

Is there an oreo-based kernel to perform cpu underclocking? Or maybe a way to be able to do the underclock on android 8? Because most of them are only on android nougat, but on oreo no one has developed anything yet ...

AntoKemz said:
Is there an oreo-based kernel to perform cpu underclocking? Or maybe a way to be able to do the underclock on android 8? Because most of them are only on android nougat, but on oreo no one has developed anything yet ...
Click to expand...
Click to collapse
There is an app I used on my old phone: https://play.google.com/store/apps/details?id=com.grarak.kerneladiutor
Sent from my Samsung SM-A520W using XDA Labs

AntoKemz said:
Is there an oreo-based kernel to perform cpu underclocking? Or maybe a way to be able to do the underclock on android 8? Because most of them are only on android nougat, but on oreo no one has developed anything yet ...
Click to expand...
Click to collapse
You can underclock with stock kernel if I know correctly.

The stock oreo kernel of a520f supports these features and it should apply to (Exynos) most custom kernels, all devices across A 2017, and most related devices.
/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq - Max clock of cluster 0, reduce to underclock the CPU.
/sys/devices/system/cpu/cpu4/cpufreq/scaling_max_freq - Max clock of cluster 1, reduce to underclock the CPU.
/sys/power/cpufreq_max_limit - Max clock of both clusters, more forced once permissions are set, watch device temperatures.
/sys/power/cpuhotplug/max_online_cpu - write a number 1 to 8, it is the CPU cores that are online.
Maybe relevant:
/sys/class/misc/mali0/device/dvfs_max_lock - GPU clock, more forced once permissions are set, watch device temperatures.
/sys/class/misc/mali0/device/core_mask - The GPU core combination in use, write a number 1 to 7.
/sys/class/misc/mali0/device/dvfs_governor - GPU governor, write a number 1 to 3.
/sys/class/devfreq/17000010.devfreq_mif/max_freq - could affect cellular and wifi
/sys/class/devfreq/17000020.devfreq_int/max_freq
/sys/class/devfreq/17000030.devfreq_disp/max_freq
/sys/class/devfreq/17000040.devfreq_cam/max_freq
The CPU governor is with scaling_max_freq though only userspace performance interactive.
Reboot to undo changes.
Edit:
/sys/devices/system/cpu/cpufreq/mp-cpufreq/cluster0_max_freq
/sys/devices/system/cpu/cpufreq/mp-cpufreq/cluster1_max_freq
Though this should not exceed the max clock, in addition to the governor's settings(/sys/devices/system/cpu/cpu[0-7]/cpufreq/interactive/...), the CPU clock is boosted temporarily when the screen is touched, the activity is changed, etc, even when it might not be needed. It's often "touchboost", and could be disabled by enabling medium power saving, or,
/sys/power/cpufreq_min_limit (home, gesture, scroll, app change, unlock)
"644 permissions" - disabled
"664 permissions" - default
check its contents after changing, should be the CPU min clock.
/sys/class/input_booster/level (touch, long touch, multiple fingers, etc)
0 - disabled touchboost
1 - low
2 - default
3 - high
might need the permissions being 464
CPU 4-7 needs to be powered on before cpufreq becomes available in its folder.

sheepkill15 said:
You can underclock with stock kernel if I know correctly.
Click to expand...
Click to collapse
Instead of what I understand, with the normal app type cpu master, or no frills cpu you can not change the clock of the CPU and the governor, but with the app Kernel Adiutor, recommended by @iloveoreos is possible, it is very strange this thing. However, despite the underclock of the CPU you can not then earn so much battery, it seems void

AntoKemz said:
Instead of what I understand, with the normal app type cpu master, or no frills cpu you can not change the clock of the CPU and the governor, but with the app Kernel Adiutor, recommended by @iloveoreos is possible, it is very strange this thing. However, despite the underclock of the CPU you can not then earn so much battery, it seems void
Click to expand...
Click to collapse
It doesn't count that much because you rarely use the cpu max freq. Maybe try underclocking the gpu too, if you can but probably not and there's not much else to do

AntoKemz said:
Instead of what I understand, with the normal app type cpu master, or no frills cpu you can not change the clock of the CPU and the governor, but with the app Kernel Adiutor, recommended by @iloveoreos is possible, it is very strange this thing. However, despite the underclock of the CPU you can not then earn so much battery, it seems void
Click to expand...
Click to collapse
The cpu and gpu are managed by the OS and its resepective governor settings. Little will be gained by reducing cpu cylcles unless it's correctly managed.
The single biggest battery user is the screen. Either reduce the brightness to the lowest you can stand and limit its on time or use powersave mode which will reduce both screen and cpu/gpu frequency.
Also selecting a more suitable governor helps.
If you frequently use high cpu usage apps its pointless using a conservative governor as you'll just lag the device. An ondemand governor would be better suited.
You can also set apps to be killed the moment you leave them in the developer settings.

ashyx said:
The cpu and gpu are managed by the OS and its resepective governor settings. Little will be gained by reducing cpu cylcles unless it's correctly managed.
The single biggest battery user is the screen. Either reduce the brightness to the lowest you can stand and limit its on time or use powersave mode which will reduce both screen and cpu/gpu frequency.
Also selecting a more suitable governor helps.
If you frequently use high cpu usage apps its pointless using a conservative governor as you'll just lag the device. An ondemand governor would be better suited.
You can also set apps to be killed the moment you leave them in the developer settings.
Click to expand...
Click to collapse
The problem is that with the only governors we have in stock are interactive, performance and userspace. The kernel allows me to just adjust the cpu, and on android oreo we do not have custom kernels that allow me to do anything. So in addition to lowering the brightness, really there is nothing that thanks to xposed and the root that allows me to do at least 5 hours of screen? The upgrade to oreo ruined everything, Nougat was too perfect