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.

learn more… | top users | synonyms (1)

0
votes
0answers
5 views

nagios plugin to check cpu usage in my server

check_CPU Plug-In I need Plug-In for nagios3 to check CPU usage in Ubuntu. I don't found any Plug-In for that
3
votes
1answer
36 views

number of logical cores exceed expectations

I have a system with an I3-3220 which based on Intel's info has 2 cores capable of 4 threads each (or total). However I noticed while watching htop with an avconv encode running that there were 16 ...
-1
votes
0answers
15 views

systemd-udevd using a lot of CPU power

I noticed that my laptop started running a little hot and the fan started to kick in more and I saw that systemd-udevd was using a lot of my CPU High CPU usage shown in top so then i did a strace ...
0
votes
0answers
19 views

How can I lower the CPU voltage (Under Volt)? [closed]

Is there a software which will help me to do this?
0
votes
0answers
28 views

Ubuntu 14.04 CPU fan issue

I just installed ubuntu 14.04 on my dell latitude e5450 and it doesn't seem like the cpu fan is working correctly. I had a 500 gb hdd in my computer and today took it out and installed a 240 gb ssd ...
0
votes
0answers
8 views

How i can activate cpu.cfs_quota_us in Cgroup?

How I can activate cpu.cfs_quota_us function in Cgroup on Debian Jessie (raspberry pi 4.1.13-v7+ kernel)? This file not exist in cpu controller after creating the group and I didn't find how I can ...
-1
votes
0answers
39 views

How to enable Ubuntu to use all of my CPU's cores

I'm running Ubuntu 15.10 with a AMD Six-Core 6100, I run the command lscpu and it shows up as this Can anyone help me :)
1
vote
1answer
99 views

Celeron N3050 Braswell CPU usage too high on Ubuntu 14.04

I have an intel NUC with an N3050 in it. Just running Firefox and gnome system monitor seems to keep the CPU usage at 100% (sometimes but not others)! I am using it as a media center, and first ...
0
votes
1answer
47 views

NMI watchdog on Haswell

When i'm trying to boot ubuntu on my laptop (Asus Transformer Book Trio TX201L), i'm getting this [ 60.079064] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [swapper/0:0] The only way i can ...
1
vote
2answers
44 views

Is it good to operate the CPU at 71 degree Celcius

My laptop configuration are Dell 3521 Core i3 3227U @ 1.9Ghz 4GB RAM Intel HD4000 graphic + radeon HD7670m 1GB DDR3 dedicated graphics. As the CPU fan runs at max from staring of ubuntu, I am using ...
3
votes
1answer
22 views

View size of CPU cache through the command-line?

How do I view the size of my CPU cache using the command-line? I want to view information on L1, L2 and L3 cache. Also, would it be possible to ouput only information on cache, so that all other ...
0
votes
0answers
10 views

High fan utilization for 30 seconds every 50 seconds on Ubuntu 15.04

About twenty minutes ago, I was getting a fan speed of full every fifty seconds. This was slowing down my computer, and even moving the mouse or typing a key took seconds to affect a change. I took ...
0
votes
0answers
16 views

Does Ubuntu have a Windows SpeedBoost feature?

My computer only has 1GB of ram and I want to run a Minecraft Server which requires more ram. Can I use something like Windows SpeedBoost?
0
votes
0answers
18 views

How to extend the virtual memory in Linux?

I have a 1GB ram pc, is there a way to extend virtual memory? I cannot do anything because my pc is moving horribly slow. I am planning on buying a raspberry pi b+ and really need it fast for a ...
0
votes
0answers
48 views

Idling VirtualBox Windows XP guest consumes >100% CPU host

As the title, I'm running a Windows XP 32bit guest on a Ubuntu 14.04 64bit host using Virtualbox 5.0.12. More often than not the Virtualbox process consumes more than 100% of CPU, even if the guest ...
0
votes
0answers
30 views

How can I discover why the game Dota 2 causes a reboot?

The background to my question The main problem is that, when I'm playing a game (Dota 2) the computer restarts only (and only) when the game finish (exactly when the scoreboard appears). It doesn't ...
0
votes
1answer
45 views

Intel Core i7-3612QM multi-core CPU not being utilised properly

I have a Dell Inspiron 7520 with an Intel Core i7-3612QM CPU that repeatedly cycles through 100% usage of each individual core while barely using any other core as shown in the screen shot below. ...
0
votes
0answers
28 views

How do I fix high COMPIZ CPU consumption 14.04 other “fixes” haven't worked

So everything was working perfectly fine until I tried to install the proprietary drivers. (I have an Nvidia Ge Force 320m) I had a suspicion that I may be unable to boot, and my suspicion was ...
1
vote
1answer
2k views

Performance Ubuntu 14.04.3 LTS vs 15.10

I am running now on Windows 7, but i am thinking about going to Linux (Ubuntu), i have experiences only with debian (VPS) yet :) But i like Linux, so i would like to have Ubuntu as my primary desktop ...
0
votes
2answers
77 views

This kernel requires an x84-64 CPU, but only detected an i686 CPU

I have used Ubuntu on my laptop for several years without problems. I now want to download it to my desktop. I followed all the steps, but when it starts to load I get "This kernel requires an x84-64 ...
2
votes
2answers
58 views

How do I find the right ubuntu kernel for an i686 CPU? [duplicate]

I burned a copy of Ubuntu to dvd, I went to install it on an Acer Aspire 5610z which had vista. I removed vista and put xp on it about 3 or 4 years ago. My problem is that I now have a black screen ...
0
votes
2answers
50 views

Forcibly reduce usable CPU

I'm looking for some sort of method to reduce the heat produced by my laptop. I was wondering if there is a method to throttle the CPU usage in Linux. I have a laptop whose fan seems to be going a ...
0
votes
0answers
30 views

fancontrol eating up cpu

I am experiencing huge fan control problems. I recently switched from windows 10 to ubuntu gnome 15.10, and I juste love it ! After trying to install nvidia drivers and prime support for several days ...
0
votes
1answer
44 views

L3 cache appears as disabled

In my XPS 8700 i7 4790, the comand lshw shows that the 8MB L3 cache is disabled, does this mean that the L3 cache is not working? should I not use ubuntu and go back to windows? does the operating ...
1
vote
2answers
69 views

top command on ubuntu multicore cpu shows cpu usage >100%

I have ubuntu running on a multi-core CPU with 32 cores. When I check the cpu usage using top command, sometime it shows more than 100 %, like 340%, 650% etc. I did some investigation and found that ...
1
vote
0answers
81 views

Abnormal fan behavior: Sticking and persist on max speed (HP Envy 6-1154er & Ubuntu 14.04)

1. I have HP Envy 6-1154er under Ubuntu 14.04 LTS. I encountered the invalid fan behavior. As cpu load grows and if it makes fan to work on max speed the speed never goes back to "silent mode". When ...
0
votes
0answers
75 views

Kswapd0 using 100% of CPU

I've got a mini server running (L)ubuntu 14.04.3, kernel 3.4.39. Every once in a while, the process kswapd0 will use 100% of my CPU power, even though I only use about ~20% of my RAM at that time. ...
1
vote
1answer
47 views

LibreOffice cpu usage 50% in Ubuntu and Xubuntu 15.10

When I load 400 pages of ODT document in Ubuntu 15.10 and Xubuntu 15.10, cpu usage becomes 31%. It is soffice.bin file. After editing, cpu usage becomes 50% (cpu0: 100%, cpu1: below 10% or vice versa) ...
0
votes
1answer
102 views

Issues running ubuntu 15.10 on Acer r3 131t acpi need to be of

I am trying to install ubuntu 15.10 on my acer R3 131T. I have run in to several problems, most of which where easy to fix. However there is this one problem i can't seem to get by. I can not boot the ...
0
votes
0answers
25 views

Is there certified version of Ubuntu for Dell Vostro 3300 i5?

I recently started using Ubuntu 14.04 LTS. I often get "System Problem" messages, as well as other small issues. (System freezes from time to time, especially when using LibreOffice.) I am not ...
0
votes
0answers
71 views

Why my desktop Ubuntu system has lag when CPU is not full?

I have a desktop workstation installed with Ubuntu 14.04. It has i7-5820 CPU, 6 cores 12 threads. When I run my 10-threads code which takes up 80-90% CPU usage. (See monitoring statistics below). I ...
0
votes
1answer
34 views

What is it called when I have UBUNTU installed in hard-computer?

I want to know what should I call the fact of having Ubuntu installed in the computer itself. I installed it removing windows because I want to install windows on Virtualbox instead. I am not ...
0
votes
2answers
166 views

how to make cpugovernor intel_pstate stable?

I am trying to set to a specific frequency in cpu governor. However, I am not being able to do so. My processor is 12*Intel(R) Xeon (R) CPU E5-2620 v3 @2.40 GHz With intel_pstate driver it gives ...
0
votes
2answers
38 views

CPU Overusage Ubuntu 14.04

I'm very new to Linux and Ubuntu. I did install Ubuntu 14.04 on my Vaio laptop and all was working fine. Yesterday, I did the last update and since then my fan is working all the time. CPU temperature ...
1
vote
0answers
76 views

Libreoffice 5 in ubuntu 15.10 raising system temperature

I'm using 15.10 upgraded from 15.04 and when I open some documents with new Libreoffice5, the system temperature goes to 60-65ºC (or more!), when normally stands between 45º and 50º. Also, ...
1
vote
1answer
76 views

Why is khubd process using too much of my CPU?

analyzing the process manager I found that the khubd process uses more CPU than other processes all that are running. It uses at least 25% and even uses around 40%. Does anyone know what this process ...
1
vote
0answers
32 views

How can I prevent `convert` from causing my system to grind to a halt?

When I run ImageMagick to create an animated GIF from a large number of images, it uses resources such that my i7 system becomes unusable. Within seconds of starting, everything freezes and, ...
3
votes
1answer
122 views

Kworker making computer difficult to use

I followed the steps on here Kworker, what is it and why is it hogging so much CPU? to try to figure out why there's a Kworker consuming a lot of CPU power. Normally this wouldn't be an issue because ...
0
votes
0answers
14 views

stubborn high cpu question w/ hp g6

I've got ubuntu 14.04 installed on my HP G6 laptop Processor: AMD A6-4400M APU with Radeon(tm) HD Graphics × 2 Graphics: AMD Radeon HD 7520G I get very high (40%-100%) cpu usage when watching any ...
0
votes
0answers
60 views

CPU fan very loud while PC is idle

I am using Ubuntu 14.04.3 LTS. I am rather confused what exactly is wrong. The command 'sensors' shows 33 degrees for one reading, and 69 and 78 degrees for the other two: it8720-isa-0228 Adapter: ...
1
vote
1answer
67 views

Antlr can't be found when building Processing

This is my error when building http://www.processing.org/: BUILD FAILED /opt/processing/build/build.xml:309: The following error occurred while executing this line: ...
1
vote
1answer
41 views

unable to open ubuntu in Oracle VM Virtual box [duplicate]

When i start the Ubuntu in Oracle VM Virtual box, it throws following error. This kernel requires an x86-64 CPU,but only detected an i686 CPU. Unable to boot- Please use a kernel, appropriate to ...
1
vote
0answers
49 views

Unable to install Spotify on Ubuntu 15.04. Where do I find package spotify-client?

I have followed the basic instructions that Spotify.com provides, running the commands. But after running them all I get a message saying "Unable to locate package spotify-client". Now, I read ...
1
vote
1answer
42 views

Getting Problems with intel_pstate

Recently, I thought that the graphics drivers are the one causing me very huge lags/hangs on my system. But just earlier, I discovered that the process kidle_inject is causing all this troubles. (Upon ...
2
votes
2answers
65 views

Indicator displaying current CPU frequency and usage

Unfortunately, it seems that cpufreq indicator is only showing an icon indicating proportional frequency instead of precise number I would like to see. Is there any indicator showing actual CPU ...
0
votes
0answers
34 views

Possibility to Limit Processor Utilization by %?

This question refers to the feature in Windows Power Settings that has 2 options: Minimum processor utilization: 0% Maximum processor utilization: 100% Since the default Power Options in Ubuntu ...
0
votes
0answers
34 views

Unable to install ATLAS even after disabling CPU throttling [duplicate]

I am trying to build a computational tool called SU2 from source on my Ubuntu 14.04.3 and it has many prerequisites, ATLAS being one of them. Being new to Ubuntu, I followed this guide for ...
1
vote
0answers
68 views

Can Ubuntu tablet run on an A7 CPU?

I was wondering if Ubuntu tablet is companionable with A7 CPUs such as the ones that were released in the new kindle fire. I know they are compatible with A15 cpus.
0
votes
0answers
128 views

mcelog: CPU is unsupported - how to fix it?

Got problem after trying to install samba4. Some of the packages throwing up error: # apt-get install attr -y // NO MATTER AT ALL PART: Reading package lists... Done Building dependency tree ...
0
votes
0answers
57 views

Why my Ubuntu is so slow? [duplicate]

I have Samsung R610 with Ubuntu 15.04. My computer works very slow. What can I do to speed it? Sholud I clear something (remove some package)? Or is only install driver will resolve problem? It's my ...