Database Develop

[Q] CPU frequency throttling

hi all
im using DooMKernel for a while and when i set the maximum frequency for any speed faster than [email protected], when the cpu is on heavy load or when the phone temperature is rising above some threshold (i think it's around 45 degrees, not sure tho) - there is an automatic down throttling to stock valus (max 1.5ghz) and nothing will recover it back to modified values unless reboot or reapplying the OC via SetCPU or equivalent.
now, i know there is a 'thermal control' sort of mechanism, and i also know it probably resides both on os level and sony framework, but i wish i could disable it somehow.
i know there is a great risk of frying my XZ, but im only intend to overclock for short terms and not for a main daily usage.
a quote from DooMLoRD's post on the subject:
It has been observed that the overclocking sometimes reverts back automatically to stock settings especially after heavy CPU load and if the device heats up.
I think have found why this happens:
Android OS level
there is a binary called: /system/bin/thermald which writes lower CPU freq values to the CPU sysfs interface if the device starts heating
there is also an app "Overheat Control" which i suspect is doing something similar
Kernel level
there seems to be some sort of fail-safe in place "msm_dcvs" which resets the CPU to 918Mhz or 1026Mhz or 1512Mhz
could also be some other things i am still searching
now there are ways to circumvent these issues but given the risk of the damage associated with overclock for long time i think its in our best interest to not screw with these fail-safes...
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if someone could plz explain how to totaly disable thermal control - it would be much appreciated.

if you totally disable them your Smartphone will shutdown every time you reach....(cant remember! think it was 75°C) SoC Temp! and you will reach that kinda fast!

[Q] CPU frequency adjustment problem

Hi guys
I used most 2 reliable apps ( Pimp my z1 & Performance Control ) but I have problem on both adjusting cpu freq . for example when I adjust the min on 300Mhz it will return to the default ...
what should i do?

Have you got kernel support to OC/UC?

gregbradley said:
Have you got kernel support to OC/UC?
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Yes! Using doomkernel v21... When i go to cpu control in pimp my z1 and adjust the freq, for example i change the min value from 1190 to 300 then save it,and press the back button and when i come back its again on 1190 or sometimes its higher. Now its on 1728 on min and Nan on max.
Have the same problem with the performance control too..
P.S the battery drains so fast too,the upper part of phone is warmer even when i'm not doing anything heavy. Editing this post got 3% battery! Using iHackers 4.1

CPU throttle

So I've gotten my standby time to be pretty good but under moderate use, the device is getting warm and chewing through battery. I.e 4hrs off charger, 40 minutes of screen and only 71% left. I'm stock rooted and removed bloat. Even had stuff greenified (just uninstalled to test now). Is there anything I can do without tripping Knox to slow down the CPU a little? The native power save mode is all or nothing now - they used to let you control which features were enabled on older devices

km8j said:
So I've gotten my standby time to be pretty good but under moderate use, the device is getting warm and chewing through battery. I.e 4hrs off charger, 40 minutes of screen and only 71% left. I'm stock rooted and removed bloat. Even had stuff greenified (just uninstalled to test now). Is there anything I can do without tripping Knox to slow down the CPU a little? The native power save mode is all or nothing now - they used to let you control which features were enabled on older devices
Click to expand...
Click to collapse
If your rooted, download a program called Trickster Mod. (All credit to the dev) It allows you to underclock the CPU. Stock value is set at 1.5Ghz. WIthout an overclocked kernel, that value cannot change. However, underclocking is available. And since this device is a true octa-core dropping it to 1.2 Ghz shouldn't be a problem. Also you can change your governor to a conservative one. Stock is ondemand. Conservative and Performance are able to be selected. Changing your TCP congestion to cubic instead of the stock bic, in my experience, gives you a bit better battery life as well. Hope this helps.

Thanks!

The app doesn't say it supports s6, does it definitely work?

You can try kernel tweaker which is also availble on the play store. By the way we do have a Q&A forum so your questions would be better suited over there.

I can't find anything called "kernel tweaker" exactly... Also my question was about apps and this is app subforum. Sorry if that isn't correct

Xperia Z1s constantly restarts after trying to modify the CPU frequency

So yesterday I finally got around to rooting my Z1s with Kingroot and that turned out fine. The problem arises when I try to limit the frequency of the CPUs with the app known as Device Control (Pimp my Z1 does not save). Whenever I modify the frequency ever so slightly, the phone immediately restarts to go back to the default settings like it doesn't want me modifying it or something. Is there a frequency such that my phone will be forced to accept my changes? Also, what setting should the governor be on? My kernel version is 3.4.0 perf-g9ac047c7 #1. I haven't a clue what I'm doing so if anyone could guide me through the process, that would be much appreciated! I'm doing this because I want to take advantage of Battery Doctor's ability to underclock the CPUs and make them less of a battery drain.

[solution]: Phone shuts down during gaming/ charging

Most of your know about this problem. People complaining about phone heating, phone shuts down in the middle of gaming, heating while gaming with 90hz in all forums. But no one come up with the solution and Some even told us to send the phone to get serviced [yeah, but even then the service center will say that it is motherboard fault, which is the costliest replacement of all around 25k INR]
[NOTE: I want this to be heard by ASUS to release software update. If you are a moderator of any Asus forum or who could contact ASUS dev, share this thread with them]
First and foremost we have to understand what is causing the problem. And everyone who is facing the problem knows Its the Temperature causing the shutdown. But ASUS never implemented any Warnings to to the UI, instead they give active cooler to 256+ GB version, while leaving 128 GB owners stranded. I faced the shut down problem when updating to A10 around a year back.
Every time when I game outdoor on warm condition (around 30 degrees) and After few months of updates, it started to shut down very frequently. So I switched back and forth to custom ROMs and even to stock A9s.
Faced the worst embarrassment "Gaming phone shuts down in front of cousins who were playing in budget phone"
Finally my Gaming phone become a phone which cant game anymore.
Finding the real Problem:
After researching about android thermals and I even tried to stop the shutdown from happening to my device. But I failed and my device successfully shuts down when there is a chance.
I switched to custom rom and installed GCAM. On taking few photos, my phone died. After restarting and enabling the CPU overlay which shown the temperature and clock speed of CPU. Opened GCAM and took some photos the temperature rose from 40-65 degrees in an instant and it died and I noted all the CPU cores are ran at max clockspeed.
So, I switched back to stock rom, used Armoury crate to limit and limited the CPU clock speed of GCAM, Again same result phone died (like the custom rom Armoury crate displayed the max clock speed of 2.96 Ghz, though the app was being set to use lower clock of 1.92 Ghz)
After using and failing to limit CPU clock using kernels, It was conclusive that the temperature is not causing the issue, "NO_THROTTLING" of CPU does.
During heavy load on CPU like gaming or benchmarking, all CPU cores will run at high clock speed, which increases the temperature of CPU. To counterfeit this, the system applies slightly lower max clock speed to all its cores, makes the CPU to run at slightly lower clock speed. As the temperature increases the max clock speed will get reduced till it can no longer produces heat (auto cooldown) on doing work. Same applies for GPU. This is called throttling.
What will happen, when throttling doesn't happen? All CPU and GPU cores run at max speed which increase the temperature, when there is nothing to stop the rising temperature. The temperature rises further [A10's thermal management kicks in] and shuts the device.
During charging, the CPU temperature will be higher due to battery dissipating the heat, so when there is even slight load on CPU (background activities like downloading) rapid rise in temperature even for few milliseconds kills device.
Maybe none of the testing devices have this problem & none of the developer devices have this problem, but this problem does exist and I'm asking ASUS to release the patch for devices which lacks controlling CPU clock speed via Armoury create, and fix the device which doesn't throttle (thermal engine)
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Temporary Solution: Manually down clock the CPU and GPU
After so many failed attempt to apply lower clock to CPU, I found the location where the max clock speed file was located.
[I modified the file and put together in tasker (paid app to automate things) found my CPU finally throttled again]
I shared the values taken from asus thermal management applied those values and uploaded it.
Be careful, This might brick your device if used improperly, if that happens you might need to flash raw image so backup anything important. Don't point me the finger afterwards. If you are okay with that lets proceed.
We Need root access and root browser. If you have root access open any root browser and Extract the attached zip file
It has two folders and some files. CPU Reading folder has all the CPU max clock speed you can use to apply lower clock.
the folder contains 9 digit number like 295241178
First 3 number denotes max clock speed of Prime core i.e., 2.96Ghz
Next 3 numbers denotes max clock speed of Big core i.e., 2.4Ghz
Last 3 number denotes max clock speed of little core i.e., 1.78Ghz
for GPU First 3 number is the MHz of max clock (6750 is 675 MHz)
Select the clock speed you need
(lower number = lower clock speed = low performance = less heating
Higher number = high clock speed = better performance = more heating)
CPU has 9 different clock speed littleBigPrime combos
Gpu has 5 different combos
Applying clock speed
Replace the CPU file cpu_max_freq to the folder /sys/module/msm_performance/parameters
Replace the Gpu file max_gpuclk value to the folder /sys/devices/platform/soc/2c00000.qcom,kgsl-3d0/kgsl/kgsl-3d0
Replace those files and see if your device shuts down on gaming, if it does choose the lower value and repeat the process.
Everything should work properly now. It might not be great solution but it will prevent shutdown.
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Im creating an app to solve this, which is in progress. Will update once everything is done.

por favor, preciso deste aplicatirvo!

venkatesh321 said:
Im creating an app to solve this, which is in progress. Will update once everything is done.
Click to expand...
Click to collapse
Are you done making the app, cuz i really need it rn

its power ic related issue. throttling app is reducing the performance