HI! Does anyone know how to shutdown cpu cores? My CPU is draining my battery since it's always activating the second cpu instead of utilizing the cores on the same cpu chip. Im very familiar with rooting, flashing etc so all suggestions is appreciated.
Do a little search in the Z5 forum, I'm sure you'll find it there...
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Hello,
I saw somewhere on some PocketPC application that was lowering down frequency of CPU if device was unused - because of saving battery.
(sorry for my poor english)
I'd like to ask you if:
- is it possible and working (saving energy)?
- isn't it unhealthy for CPU?
Maybe I am just wrong but it sounds cool to me.
Thanks for answer!
iv heard of that before, i think its called *speed stepping* dont quote me on tht.and intel use it on there cpu's but i dont knw if a phne would support such a thing.it does and would save enerrgy by reducing the clock speed of the cpu it can use less volts at the core etc
now that you have said that...i wonder if you could over clock the cpu on a ppc???
would void warranty and the usual but would be good for certain handsets.
sorry i havent actualy answered ur question though
D
4n60 said:
Hello,
I saw somewhere on some PocketPC application that was lowering down frequency of CPU if device was unused - because of saving battery.
(sorry for my poor english)
I'd like to ask you if:
- is it possible and working (saving energy)?
- isn't it unhealthy for CPU?
Maybe I am just wrong but it sounds cool to me.
Thanks for answer!
Click to expand...
Click to collapse
There is no way to Overclock the Kaiser so there will be no way to Underclock the Kaiser from what i have read.
4n60 said:
- is it possible and working (saving energy)?
Click to expand...
Click to collapse
Yes for some PocketPCs, but it's depending on the CPU, and there's currently no solution for the Kaiser.
4n60 said:
- isn't it unhealthy for CPU?
Click to expand...
Click to collapse
Nope. I've over/underclocked most of my previous PDAs.
However I was more often overclocking than underclocking, as those devices are already slow enough. Unless you use it like an MP3 player for hours without doing anything else, with screen off, and where you know you need long battery life, it's just not worth having to put up with a device that is slow as hell for minor savings. There's not only the CPU drawing power there - even slowing it down by 2 won't save you much more than 10-20% power when in normal use with screen on... the backlight will already draw more than the CPU at normal speed.
Actually you might end up using more energy with the device underclocked, as you'll be staring at that lit up screen for longer while it *tries* to do what you asked it to
When "unused" as you mentioned in the title - which I understand would be when it is in your pocket doing nothing - the CPU is already in sleep mode and not running, so no such savings possible here.
Thanks for replying...
I was overlocking too some of my ppcs but it wasn't useful everytimes... (freezing etc...)
I was worried about underclocking - I don't have any experience with this...
Ok, now I got it.
Well - cool and fast PDA = daily charging...
Thanks again...
BTW: I can't turn off backlight in my kaiser. It isn't possible ?
4n60 said:
Thanks for replying...
BTW: I can't turn off backlight in my kaiser. It isn't possible ?
Click to expand...
Click to collapse
No unfortunatly it's not possible. This is my first PDA which does not allow to turn off the backlight. You can just put it as low as possible.
You may not be able to shut off the backlight, but with S2U2, you can set it to lock when you shut off the screen, thus allowing you more power saving.
But as for idling saving you power, if you have TCPMP player, you'll notice that it can read the processor speed somewhere below 400MHz. The processor's designed to automaticly adjust to save power. I once saw mine running at 195MHz.
It may not be possible to manually control, but it does do it automaticly. And underclocking actually increases the life span of the CPU.
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...
Click to expand...
Click to collapse
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!
Its any chance to make all 8 cores working?With root and some script will be possible?
They do under heavy loads. A57s pressure the battery so much and heat without cooling if work continuously. I heard A73s work continuously like A53s.
@Oveana cores got disabled on nougat and that's true!! We can't deny this!! Enabling 6 cores by default as in MM would be soo great or leaving a toggle to enable device performance to use 6 cores is a better idea which we CAn expect in future updates!!
Still no solution??
@Pwruser Its verry annoyng ,SONY DO THE WORST work ever and a fraud Maybe devs can modify kernel to make all cores to work
Get back to MM!! That's all u can do for now....Or flash a custom kernel If u r not on warranty!!!
Big cores work like mm
https://ibb.co/geGYiv
All cores are working with my Sony Z3+ with Nougat .376. By default, only 4 cores run with min frequency, other cores will start running only if there is load, it is for saving battery. You can check with "Kernel Editor" app (rooted only).
flash androplus kernel and enjoy 8cores!
@yxtl there's your answer,
also: having all 8 cores active on max performance lets the device run into thermal limit FAST,
thus ==> lots of throttling, performance goes down, lower than snapdragon 808,
do you REALLY want that ?
Just observe what the big cores do once you raise load on the device ...
And that changes things exactly how ?
Explain ?
Is there a difference in behavior of hotplug ?
(I'm curious)
Thx for answer I run some testes myself ,and A57 cores are not complete disabled ,just need more pressure to work,I asked to sony support and i got same answer
So I think I saw this feature in a review where the phone allowed you to control the clock speeds of individual cores of the CPU, but I couldn't find where those settings to tune the processor are.
I think this phone could really use some taming of the clock speeds of the processor because it is heating up in general tasks like web browsing and Facebook, which shouldn't happen.
I think the reason for this is aggressive boosting of the clock speeds even where that isn't needed.
So does anyone know how to underclock the CPU without rooting it?
Is there anything I can do on a new galaxy note 4 to prevent the emmc issue happening in the first place?
There was some talk about preventing overheating?
ghostwheel said:
There was some talk about preventing overheating?
Click to expand...
Click to collapse
Do I need to lower the cpu ghz? Or run some kind of app or program?
Redrainz said:
Do I need to lower the cpu ghz? Or run some kind of app or program?
Click to expand...
Click to collapse
It might help to lower the CPU speed, but you need access to root and an app to tweak the values.
Avoid gaming which is very demanding on GPU and avoid gaming for long periods of time.
Search also in the Snapdragon forum a good kernel.
Also turn off the fast charging, this can heat too much the phone.
I created a script here. It works very good, it monitors the battery temperature AND all the CPU cores temperatures, and will automatically throttle the phone if temps are too high. You can even kill some apps if the temps are to high (not yet implemented).
The difference with Samsung DVFS or integrated temperature management of kernels is that this one monitors almost all CPU sensors and also the battery, all in complete combination, and it can be easily tweaked (rather than modding a kernel). No battery hog. You can enable USB fast charge, game, etc it will still prevent overheating.
Here is the solution to eMMC error
Hello everyone, I was pretty tired of the eMMC error, and I created a script that completely annihilate this error. This error is due to the phone heating up, and the fact that custom kernels (maybe even the original kernel) don't read the...
forum.xda-developers.com