Questions tagged [cpu]

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Will unrooting an Android phone remove the virtual RAM created while rooted?

I have a 4yr old phone and it's CPU processor can take up to 6GB RAM, but I have the model with 3GB of RAM and it's somewhat slow in doing some tasks that are high demanding. So, after I root the ...
45 votes
4 answers
50k views

What Percentage of Android Devices Runs on x86 Architecture?

This question might be redundant or a possible duplicate, but I use an NDK library that runs only on ARM devices. Is there a way I could know what percentage of Android devices my app can support ...
0 votes
0 answers
260 views

Which folder contains the temperature sensor output for the CPU in /sys/devices/virtual/thermal?

/sys/devices/virtual/thermal/thermal_zone0/temp shows 37°C (37000 millicelcius) no matter what the actual temperature is. The device is Moto G32, Android 12, not rooted. Using cat on Termux to view ...
0 votes
1 answer
3k views

100% CPU load, battery drain with no app minimized/running in the background

I have a Xiaomi Redmi Note 4 S625 global variant (4/64GB). A day or so ago, I noticed a quick battery drain (from 100% to 24% after a whole night idle and 2-3 hours of heavy use the next day) and from ...
2 votes
1 answer
183 views

Low CPU use, but HIGH battery use! How?

This file sync app is active for 8 seconds, keeps awake for zero seconds, and yet uses 25-30% of power in a given day. What could an app be doing to drain battery, without showing up as CPU use time?...
0 votes
0 answers
639 views

How to detect cpu architecture and deliver correct apk?

There are a variety of CPU architectures that android systems use such as arm64-v8a, armeabi-v7a, armeabi, x86_64 and x86. Is there a way for adb or any other tool to detect the architecture of a ...
0 votes
0 answers
167 views

Rooted Pixel 6 CPU DVFS control without userspace governor

So I recently rooted my Pixel 6 (Android 13) using Magisk and tried to control the CPU frequency, but it did not have userspace CPU governor. I tried to set scaling_setspeed in /sys/devices/system/cpu/...
2 votes
1 answer
429 views

How can I enable cpu, memory, and io in cgroupv2 (attempt to run Docker on Android)

I am trying to run Docker on Android, using a Pixel 3a XL rooted, running stock rom but flashed a custom kernel. I need to enable cpu, cpuset, memory, io, and pid controllers in cgroupv2. After ...
6 votes
1 answer
3k views

How is the market divided between Android CPU architectures?

There is a very similar question on this site but it is outdated and contains no/outdated statistical sources. I want to know how is the market divided between arm64-v7a, arm64-v8a, armeabi (I know it'...
0 votes
0 answers
21 views

Is Android unit testing on a physical device actually a thing?

Firebase has physical devices for testing: https://firebase.google.com/docs/test-lab/android/available-testing-devices however it's a little expensive. I was wondering if testing things on a physical ...
1 vote
0 answers
332 views

Is there a way to read CPU temps on Android 9+ under root?

Given the fact I have rooted device, is there a way to get that data? Raw or w/ tools. P.S. I was looking around for a build of htop with cpu thermals but I dont think there is any compatible for ...
0 votes
0 answers
428 views

getprop: abi vs abilist

I was reading this blog post on determining the supported ABIs for a phone. It said that, prior to Lollipop, the command is getprop ro.product.cpu.abi whereas, after Lollipop, it's getprop ro....
0 votes
0 answers
194 views

Galaxy S8 has no option to show CPU usage

My Samsung Galaxy S8 (SM-G950F) is not showing the developer option to "Show CPU usage". I have turned the "Developer options" on, but scrolling down to "Monitoring" I ...
7 votes
2 answers
1k views

Why does the number of available CPU cores change when an app is closed?

To find the number of cores available to you in Termux you run: grep Cpus_allowed /proc/self/status This number of cores is limited in a similar way to running taskset on GNU/Linux. I am trying to be ...
0 votes
2 answers
871 views

Performance troubles with Motorola Moto X Force (Android 7.0)

Since quite some time I am having some peculiar performance problems on my Motorola Moto X Force. Sometimes any interaction (like just opening Chrome for example) takes incredibly long until it ...
1 vote
0 answers
107 views

How can one find out whether Android is throttling my CPU, e.g. because the temperature is too high?

I'm suspecting that Android sometimes limits my CPU at around 66% when the temperature is too high. I can see that my Geekbench score is much lower than what it should be: Even though my CPU isn't ...
3 votes
7 answers
15k views

CPU-Z shows 8 cores, but 4 of them are stopped

I am using CPU-Z to test basic things about the J7. It reports an Exynos Octa 7580, 8 cores, 8x ARM Cortex-A53 @ 1.5GHz, r0p3, 28 nm. At all times that I checked, only cores 0-3 are active, and cores ...
1 vote
0 answers
606 views

How to automatically set a CPU governor on boot?

There are apps that can accomplish this task (e.g. "Kernel Adiutor" and others), however they in turn require other apps that can grant them root access to begin with, which is a lot of ...
1 vote
0 answers
767 views

Is it safe to turn off kernel panic in Android?

So I'm using a custom kernel that overclocked my CPU and GPU. I turned down the frequency to stock but the big cpu freq can't be set(restore itself to default after some time), causing my phone to ...
0 votes
1 answer
56 views

Number of cpu cores change in my systrace output

I have 4 cores cpu on my device, but each time I use this command line to genetrate a systrace file : python C:/Users/BJI/AppData/Local/Android/Sdk/platform-tools/systrace/systrace.py freq idle -o C:/...
1 vote
0 answers
51 views

The powerprofile and systrace outputs are not consistent

I'm generating the PowerProflie file and the Systrace file to get the energy consumption of an Android Application, but I found that the number of cpu cores is different between the two files. I'm ...
2 votes
0 answers
380 views

Does turning off cpu cores will actually save power?

My phone is using custom kernel that has cpu hotplug in it. The hotplug name is AutoSMP and it has max cpu (big & little) core that should be online option in it. Currently I'm using 3 + 3 core ...
0 votes
0 answers
41 views

SoC compute-resource usage monitor for single app

I need to understand the compute resource usage of a compute-intensive app; this includes the CPU (ideally including the core ID), GPU, DSP, AI Engine in the processor (for Quallcom chips). I have ...
0 votes
0 answers
122 views

How can I tweak my kernel to use all CPUs in my rooted device?

I have Huawei ALE-L21 alice (2015) Magisk-rooted Bootloader-Unlocked Xposed-Installed but it's somehow slower and I decided to tweak my CPU but here is what ES Kernel Manager shows: Also, I can't ...
0 votes
1 answer
1k views

How to turn off CPU cores on Samsung Galaxy A8?

I need to turn off CPU cores in order to make energy measurements of sets of cpu cores in isolation (meaning that I want to run an application on a set of cpu cores and turn off the cpu cores that are ...
1 vote
0 answers
200 views

Phone overheats after powering on

I've seen this with plenty of smartphones,usually after 1-2 years of use.The phone overheats for a minute or 2 before cooling down,but it's performance doesn't differ from a non-overheating phone that ...
0 votes
0 answers
120 views

Help me with correct cpu / rom file

I buy a phone from Ebay, i flashed the phone with wrong rom's in Smart Phone Flash Tool. then i flashed the phone i check the Bootloader off. so i don't flash the preloader. I searched around and i ...
0 votes
0 answers
170 views

How to find if the processor has hardfloat

My mobile got MSM8953, App, Droid info says: Instruction Sets: armeabi-v7a, aremeabi CPU Features: half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm aes pmull sha1 ...
0 votes
1 answer
82 views

What's the point of pseudo-big.LITTLE CPU in Nokia 7 plus?

As far as I understand: CPUs can change their frequencies relatively quickly, which can be used for performance-power tradeoff based on load and priorities. big.LITTLE goes further – you can switch ...
1 vote
1 answer
427 views

Uber Driver app using too much resources

So, I'm working a bit as a bicycle courier for Uber Eats. For this, I have to use their app Uber Driver. Problem is, my phone battery (which still holds charge well) is draining very, very fast when ...
1 vote
0 answers
578 views

CPU-Z shows all cores stopped

Is there anybody could help me explain this situation? By the way, something malicious I don't know (not cpu-z) cause battery drain whereas anti-virus software tells nothing.
1 vote
1 answer
339 views

Why doesn't BOINC use the CPU power fully on my Huawei P9 lite?

I installed BOINC on my Huawei P9 lite. model VNS-L31 build VNS-L31C432B414 Android 7.0 (stock) CPU Kirin 650 RAM 3 GiB I want the phone to run BOINC applications, when fully charged and connected ...
2 votes
3 answers
6k views

How can I find if I have a rogue background process killing cpu and battery?

On my Android phone (Sony Xperia Z3 Compact), I have a situation where it sometimes goes very sluggish, and the battery drains quickly. This seems to happen after roughly once a day, and lasts until ...
0 votes
1 answer
155 views

Something eating CPU on Sony XPeria XZ, how to find out what it is?

I have two Sony Xperia XZ devices, bought both very recently in UK as used-with-warranty. One is working great, but the other (which has a 3 logo come up when booting) apparently has something using ...
1 vote
2 answers
1k views

Overheating device with random apps spiking CPU usage

Few days ago my phone has started overheating and burning through the battery like crazy. I don't use it too much, and it used to last 1.5-2 days, now it's dead in 6 hours. I've installed System ...
4 votes
0 answers
7k views

CPU usage by app on Android 8

My Samsung S7 is seriously overheated. Battery is being consumed super quickly. I need to see a simple list of applications with percentage of CPU usage. I am desperate because all attempts and ...
0 votes
1 answer
2k views

Android CPU usage: What do the red, green and purple bars and the numbers mean?

The Internet as a truckload of myths about this. Today, it is time to bust the myths. When the CPU usage bars that can be enabled in the developer options are being displayed, there is a list of ...
3 votes
0 answers
787 views

Restrict CPU frequency from going too high

I got a OnePlus 6 running on Snapdragon 845. The CPU can clock up to 2.8GHz, which is very battery-consuming. I want to limit the CPU clock frequency to, say for example, 2.2GHz or another value I ...
0 votes
2 answers
397 views

Is it possible to estimate the ideal number of CPU cores for Android phones?

I'm thinking that with the way we typically use Android phones, run a single app at a time, fewer faster CPU cores are better than many smaller (slower) cores. Does Android really benefit that much ...
1 vote
0 answers
413 views

How to set CPU frequency as early as possible?

What I mean by this question is the sequence of execution of scripts at boot time. Suppose I have this line of script: echo 307000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq I want ...
1 vote
0 answers
2k views

How do I check if my phone has hardware video encoder?

I own a Samsung j7 2016 and I did some search about the CPU and looked for information tools but I've found codec info but not hardware video encoder info anywhere. If you know any app or adb command ...
0 votes
0 answers
3k views

Strange system app called Helper eating too much battery , data , CPU and freezing device

My phone usually work well until recently it turned out that battery gets really hot and camera Section that the phone starts popping that I should remove battery . when I look at battery usage I ...
0 votes
1 answer
593 views

Force CPU full with display black

i have a galaxy core duos and minergate instaled for test, however, my H/s in on display stay in 7 and in off stay in 0,5, i instaled overclock app however did not work. how to force CPU full speedy ...
0 votes
0 answers
173 views

Change File Value in CPU Folder

i want to change value in sched_mc_power_savings file, using this code : #!/system/bin/sh mount -o remount,rw / mount -o remount,rw /system busybox echo "4" > /sys/device/system/cpu/...
0 votes
0 answers
690 views

How To Check What Apps Is Eating My CPU

My device is so laggy so I downloaded CPU - Z to check my CPU and I see 50 - 70% CPU load I tried Cache deleting and RAM Cleaning but it's still using a lot of CPU Are there any Add-ons so I can ...
1 vote
0 answers
35 views

When activating DATA, all Apps wants to go online at the same time. any fix?

I like to deactivate my 4G Data or Wifi when I'm not using it. But whenever I activate Data (4G or Wifi), all the Cores of the CPU are being used at 100% and the phone becomes unusable for at least ...
1 vote
0 answers
244 views

ARM big.LITTLE effectiveness in custom roms

In stock roms it's obvious that the manufacturer tries to make use of big.LITTLE technology as mush as it can (cluster managing, workload distribution etc.); I'm wandering what will happen to "these ...
0 votes
0 answers
29 views

Lowest temperature that sensors can measure

So I've doing some work and phone wasn't in my pocket but in room where temperature was low (let's say about 3°C) I was curios what phones battery and cpu temperature sensors say and you see what they ...
1 vote
1 answer
587 views

Using phone's computing power to assist in PC's calculation

Is phone cluster or cluster with PC and phones possible? I was thinking if recoding MOSIX or using any other program/software to connect your phone with PC and let the PC use phone's computing power ...