Questions tagged [cpu]

CPU stands for Central Processing Unit, and is the main processing chip used in every computer. Brands include Intel, AMD and ARM. CPUs are commonly available in 32- and 64-bit, and come in a variety of frequencies or with multiple cores.

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Ubuntu 20.04 running slow with low CPU usage

Just got a brand new install of Ubuntu 20.04 and it's running rather slow. I was using 20.04 before and it was snappy, recently I had to get rid of that and start again. I've got largely the same ...
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My ubuntu server with AMD Ryzen 7 3700X can't use 4.4Ghz

lscpu ljq@ljq-System-Product-Name:~$ LANG=en lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian Address sizes:...
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What's causing the lag spikes to my ubuntu linux server node process

I run about 5-6 node processes related to discord.js, and sometimes I get some lag spikes and some of my node processes are printing ''Killed'' and it's terminating their process. Why is that? here ...
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Ubuntu 20.04 - High load on CPU because of IRQ 126

HP Pavilion - 14-al103ne Ubuntu 20.04 'top' command shows irq/126-aerdrv always running eating a lot of CPU.Top screenshot 'powertop' and 'cat /proc/interrupts' also attached. Interrupts and ...
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Can I install Ubuntu 20.04 LTS on Intel Pentium Silver N5000 1.1 GHz, without problems?

Background information: I intend to install Linux on a laptop with the following specs: CPU: Intel Pentium Silver N5000 Base frequency: 1.1 GHz Max Turbo frequency: 2.7 GHz Cores: 4 (no hyper-...
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CPU starts using its 100% power while playing high quality videos

I had no problem when I was playing HD videos (greater than 720P, even 4K too) in Ubuntu 19.10. I have just Installed Ubuntu 20.04 and trying to play HD videos, but video starts lagging and CPU uses ...
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Ubuntu Desktop 20.04 continuous fan operation

After switching to Ubuntu 20.04, the video card and processor fan were not working actively. However, after downloading the applications I use via the ubuntu software center, when I turn the computer ...
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How do you check if processor.max_cstate is set correctly using terminal/tilix?

I have a ryzen cpu and my cpu has been freezing/crashing a lot over the years and I couldnt' find a solution until recently and I'm told setting the max_cstate should solve my issue. But how do I ...
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Ubuntu 20.04 Audio Static/crackle with CPU load

I have steam installed on my new Ubuntu 20.04 OS using steamplay with proton 5.0-7. it was running fine before but now anytime i hover my mouse around icons on steam or try to run cpu heavy games like ...
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Intel Turbo Boost state Resets on Boot

I have an Intel(R) Core(TM) i7-8750H CPU on my Lenovo Ideapad 330-15ICH. After switching to Ubuntu 20.04 LTS, from Windows 10, I couldn't turn on the Turbo boost. After finding this solution ...
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wpa_supplicant: high CPU usage

My Ubuntu 18.04 system freezes almost once a week. I observed that the reason to this problem is that sometimes suddenly wpa_supplicant uses the 100% of CPU in one core. When this happens after a ...
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What process freezes Ubuntu?

Ubuntu 20.04 LTS For almost 2 years Ubuntu freezes randomly and I have no clue why and what process is taking over unlimited time. Sometimes the HDD is rubbing continuously for hours and it has to ...
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Is the workstation powered by Ubuntu running in full capacity?

My workstation configuration is My GPU configuration is -display description: VGA compatible controller product: GM107GL [Quadro K620] vendor: NVIDIA ...
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Systemd+ uses 95% of the CPU in a Ubuntu 20.04 focal fossa installation

In focal fossa, Top shows 95+% of CPU used by systemd+, which also uses about 20% of memory. There was a Unix StackExchange thread on this which outlined a solution which did not work. https://unix....
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High host CPU load with KVM running Win2008R2

Running Ubuntu MATE 20.04 LTS, I've created a test VM guest with Windows 2008R2 to find the most suitable settings (as I may have to switch to 2012 if configuring everything to run properly fails), ...
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Exactly same C++ code runs slower on Ubuntu than Windows

I wrote a program that ran quite fast on Windows 10 where the CPU load went very high such as 90%. On Ubuntu the CPU load never goes higher than 25% (usually 24.7%). Since my cpu has 4 cores, I guess ...
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100% usage on few core while few core are idle

I am running ubuntu 18.04 and getting super high CPU usage in some cores while other cores are idle. Htop command result here
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Xubuntu 20.04, systemd-journald high CPU usage

I'm not sure if this is the same issue as here systemd-journald high CPU usage because I was using Ubuntu 18.04 for these 2 years and everything was fine. Yesterday, I've installed Xubuntu 20.04 (...
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Calculate CPU usage from top command

I have to display the CPU usage on my application and update it in real time. I am using following command to get the CPU usage: top -b -n 2 | grep Cpu | awk '{printf "CPU Load:%.2f\n", $(NF-13) + $(...
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How to investigate an unknown process called `frontend` pegging CPU all the time

As my laptop (Dell precision 16Gb, ubuntu 18.4) had been slower than usual, I had a look at top. Here I have a process, called frontend pegging 50% of the CPU. PID USER PR NI VIRT RES ...
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Any Browser slows entire Ubuntu (18.04.4 LTS) (Gnome) system / Only one core is being used

This problem has been bothering for a little while now: Firefox slows my entire system (same thing with Chrome). Scrolling, opening new windows and typing text all lag. When firefox is open the rest ...
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10th gen Intel Core desktop processors — Ubuntu friendly?

Now that the new line of Intel desktop processors is officially launched https://www.zdnet.com/article/intel-launches-10th-gen-intel-core-desktop-processor-with-perks-for-gaming-video-editors/ I am ...
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monitoring CPU temperature

I am getting frequent journal messages indicating CPU throttling due to the CPU temperatures exceeding the threshold. Several lines like this: mce: CPU6: Package temperature above threshold, cpu ...
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gnome-shell high cpu usage when blank screen

top records nearly 100% cpu usage from gnome-shell when the screen is blanked for power saving (this causes the laptop fans to spin up). As far as I can tell cpu usage is normal during lock screen ...
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Installing Focal Fossa on a 64 bit cpu/processor (with lm flags) with a i686 kernel

I have a Dell Vostro PC that's currently running the 32-big Mate environment version 18.04. I am wondering if I can run Focal Fossa on my system. I ran grep flags /proc/cpuinfo & received lm flags ...
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Intel Turbo Boost does not work with the “Powersave” CPU Governor

Intel Turbo Boost does not kick-in with the "Powersave" governor. It does on the "Performance" governor, but it locks the frequency at turbo boost even when the CPU is idle. "Performance" Governor: ...
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Ubuntu 19.10 KWorker bug. Want to ditch Linux and reinstall Windows10 please help

Hi I previously already posted this question but no solutions were offered. One of the responses even went as far as saying that it's not a problem. My CPU1 is running at 80-90% and my laptop (...
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CPU1 80-90% After Installing Ubunto on Microsoft Surface Book 2

I'm a new linux user. Searching for solutions I found this is a kworker problem, however I couldn't find a solution that I understood and could implement well or actually worked. I spent all morning ...
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CPU usage reaches 100% when I plug-in AC

Recently I've found a problem, when I plug-in AC, CPU usage reaches 80% - 100% and I'll find a lot of lag in the system. Before connecting AC: [htop & top 1] After connecting AC: [htop & top ...
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Single CPU always at 100%, lagging | Ubuntu 18.04.4

I bought a new Laptop which was running fine for about one or two weeks. I can't exactly recall a certain trigger but I now have the problem that one CPU core is almost always running near 100% and ...
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115 views

shell script to monitor cpu usage and alert with top 5 process consuming most CPU

I need to send an email whenever the CPU utilization goes beyond 70%? How could I do this? When the CPU utilization goes beyond 70%, I also need to get the start commands and process names of the top ...
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148 views

Set Max TDP of Intel H-series CPU

I am searching for some program which deals with setting the max TDP of the CPU like we do in Intel XTU on Windows. I am able to undervolt the CPU with this project. I can also monitor the TDP of the ...
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How to enable all the cores available in ubuntu 18.04

When I executed the command: sudo lshw | grep core It's showing following output: cores:2 cores_enabled:1 threads:2 How can I enable both cores? (Ubuntu 18.04). Edit: No options visible in BIOS ...
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CPU 100% with kswapd0 process, although no swap is needed

I have this small virtual server (1GB RAM, 1 vcore), which served me well untill it suddenly started reporting 100% CPU usage because of kswapd0. Memory consumption is between 50% and 60%. I've set ...
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Processor fan doesn't work until temps are high

First of all, hello to all! I have noticed that the laptop's processor fan doesn't start working until the temperatures of the cores and CPU reach somewhat high stats (around 50°C, usually a bit ...
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how can I control my cpu frequency form a kde widget

I noticed on the distro on the PineBook it has a widget to control cpu frequency is their a way to do this on a intel CPU on kde to save battery
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CPU capped at 400MHz when the lid is closed

I am running 18.04 LTS on a MSI Prestige 14 A10SC laptop. I have modified /etc/systemd/logind.conf to set HandleLidSwitch to ignore. I close the lid and put the laptop elsewhere at home. I then ...
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What is the way to determine which tab in Firefox is using 100% of one of my CPUs?

Once in a while, firefox starts using 100% of one of my CPUs. The fact is that I may have 50 tabs opened. Looking at the output of htop I can see that one particular tab is generating the problem. ...
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High kworker CPU usage on Ubuntu 18.04 (tried multiple things with no results)

A fresh 18.04 Ubuntu install on a Windows Surface Book 2 dual-booting Windows 10. The kworker/0:0+kac process never goes below 80% CPU. I tried this Why does kworker cpu usage get so high? but I don'...
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How does lm sensors get the cpu wattage?

I've been wanting to read my "raw" hardware status, so far I've found that, in my system, I can access said status through /sys/class/hwmon. Then, I've been comparing the numbers I've found against ...
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Ubuntu 18.04 huge CPU usage on WiFi (Intel wireless card 9620)

I'm having some issues with CPU usage when using wireless connection on my laptop. This has never happened on wired connection, therefore I'm assuming wifi connection is somewhat related. top says ...
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kworker/0:2-kac is eating my CPU

I am new to Ubuntu. My CPU is showing 20% utilized in normal condition. I found that kworker/0:2-kac is showing high utilization of CPU. Can anyone suggest that what is this and what is the solution ...
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Image format for writing to disk with minimal memory mapping

I am developing an application(c++,gstreamer) in ubuntu that needs to read a video and save the frames as jpg(1920x1080) images - around 30 frames per second. Which image format is the closest to ...
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115 views

OS is terribly slow when copy or tar/untar files

Is possible to setup CPU load or RAM for better multitasking? Because when I for example copy files or tar/untar some bigger file, OS is terribly slow due this operation. Thanks. OS Ubuntu 18.04. ...
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How to check if your Intel CPU supports Intel GVT-g?

Is there a tool to check if my current CPU supports Intel GVT-g and are there any special hardware requirements in the BIOS for example that will enable it. I'm querying specifically for: Intel i7-...
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How to turn off the CPU throttling mode?

I am trying to turn off CPU throttling function and set CPU frequencies to certain value but haven't been successful. Could anyone help me to figure out the problem? cpu Frequency I already tried ...
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/usr/sbin/and using up the entire CPU coure

I am running Ubuntu Server 18.04 LTS Kernel 5.5.2-050502-generic and since a while now I've seen this /usr/sbin/and popping up in htop, always using entire full core of the server, not really sure ...
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Phantom process eating 1 whole CPU all the time but nothing listed in HTOP

I tried to search for existing topics and eventually tried this but it didn't help. I really have no idea how to approach this other than asking here. The issue is that something (not listed in htop ...
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Impossible to control fan curve/speed

For programming purpose, I finally switched to Ubuntu 19.10 on my Aero 15x v8 and could't be happier with the speed, the main problem I encounter is that fans are too loud even when boosting not for ...
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CPU frequency capped

My CPU works fine during 30 seconds then drops to 800MHz. My BIOS does not have power management. All my temps are OK: around 65° at max. I read every forum posts on the subject, tried everything. ...

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