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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In need of cpu monitoring tool that logs activity

I'm currently hosting a dedicated server that is running Ubuntu 14.04.3 LTS 64bit, recently ive been getting weird rare crashes/timeouts on my gameservers where players simply lag and then disconnect. ...
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50 views

Ubuntu not booting after upgrading RAM and cpu

I have a Ubuntu machine running on Hyper-V It is the 15.10 version 64 bit. I tried to shut it down and then upgrade it from 8 GB og ram to 16 GB and from 2 processor cores to 8. But when I turned it ...
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3answers
281 views

How to read lm-sensors on AMD FX 6300?

My FX 6300 sits on a ASUS M5A99FX Pro R2.0 and is currently overclocked (I did the stresstesting and such on Windows to get it stable). Now I need the socket temp and the core temps so I use lm ...
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1answer
50 views

how to improve cpu usage on Ubuntu server

I have two sessions running on Ubuntu 14.0x server, and I found that my program will take too long time to be finished. I used this instruction root@ns3011857:~# top -bn1 | grep "Cpu(s)" | \ sed "s/.*...
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110 views

Randomly CPU 100% system freeze

Use Ubuntu 14.04 on DigitalOcean and sometimes my CPU go to near 100%. Reboot help me well, but this is going on 2-3 times a day and I need to fix it. How to display what and where used 100% CPU ...
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86 views

Why is XPS 13 not able to run at maximum CPU-Speed?

I am currently running Ubuntu 14.04 an an 2015 DELL XPS (Developer Edition) and dealing with Speed-Issues, stumbled upon some strage behaviour regarding CPU-Speed. It seems, the CPU-frequency is ...
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2answers
68 views

Ubuntu 15.10 64-bit is not working very well in my PC

> System: Kernel: 4.2.0-32-generic x86_64 (64 bit) Desktop: Unity 7.3.3 Distro: Ubuntu 15.10 wily CPU: Single core Intel Pentium 4 (-HT-) cache: 1024 KB clock ...
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55 views

ubuntu 14.04 running slow on bootup and online

My apologizes right off is I do not know much about computers. My laptop crashed and was replaced by my sons college desktop computer that he built. we had a problem with windows XP on it and ...
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21 views

Massive throttling when switch from charger to battery on Ubuntu 15.10

When I watch a 1080p video on youtube, I got easy 60 frames/s. But when I plug out the charger the framerate drops below 20 f/s (even if battery is 100&). The governor is set to performance, but ...
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42 views

Using rdmsr and wrmsr in Ubuntu?

I have a 32 bit Ubuntu 14.04 Intel i5 processor, I dint find any good resources for changing the cpu voltage. I know that it is required to change some register values, but the ones I tried dint' work....
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93 views

CPU Throttling Occurring Despite No Need For It

This seems to happen in most every linux distro I try (haven't tried windows yet). I apologize in advance for the nonstandard situation in which it arose, but I will explain that after I explain the ...
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56 views

Thinkpad W510 gets slow after 5 mins of regular activity (CPU thread fully loaded)

I own a Lenovo Thinkpad W510. Since I got it, I always run into this problem, especially when running Ubuntu. After starting the laptop and using Chrome or Firefox with just 4-5 tabs open and ...
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49 views

CPU frequency controll

I have a dell latitude e6410 what has i5-520M processor. It's running between 1.2-2.4 GHz. I think my turbo is switched off. How could I turn on to achive ~3 GHz? In my previous laptop I simply used ...
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0answers
183 views

Strange cpufreq scaling issues: regardless of governor, max cpufreq drops incrementally on wake

I am running Ubuntu Mate 15.10 64bit (kernel 4.2.0) on a Lenovo y5070 with an i7-4710HQ cpu. I noticed recently (possibly after a recent dist-upgrade) that certain programs were really slow. After a ...
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1answer
185 views

How to update additional driver (Nvidia GPU and CPU)

Firstly i want my drivers up to date. So can you help me about that? And 1 more question, at CPU title we have 2 options like microwaves and do not use device. Which one i must use? I use that right ...
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2answers
127 views

Troubleshooting high Sy CPU Usage

I am running a Supermicro server with Ubuntu 14.04.4 LTS. We have an app that is maxing out the sy cpu time, while barely touching user space. I run the same app on older hardware, with Ubuntu 12.04.4 ...
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73 views

xorg is using too much of CPU

I'm using Ubuntu 14.04. xorg is using CPU too much. At normal activity it's using 50 percent of CPU. I have a hybrid graphic card and I didn't have find any solution for this. $ lspci -knn |egrep "...
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1answer
40 views

monitoring CPU time with “/proc/stat”

I must have some problems understanding "/proc/stat". In the attached calc sheet (an image in fact, because I could not add a sheet), I have recorded some collected "/proc/stat" with a 2 seconds delay ...
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1answer
46 views

Ubuntu Server 14.04.4 server setup

Need some help on my configuration on my low power server. I have a multiple applications loaded on my ASRock Q1900M Intel Quad-Core Celeron Processor with 4GB memory and 2 TB WD green drive. The ...
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24 views

CPU usage command line [duplicate]

I want to get the cpu usage. I tried this command top -bn1 | grep "Cpu(s)" | sed "s/.*, *\([0-9.]*\)%* id.*/\1/" | awk '{print 100 - $1}' Could you confirm if this command is correct?
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20 views

Should I use an older version of Ubuntu? [duplicate]

I just installed Ubuntu Gnome 14.04 fresh earlier today and the cpu maxes out several cores while watching Youtube videos and the cores run high while doing pretty much anything. Is Gnome my problem ...
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35 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
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1answer
74 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 ...
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90 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 ...
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58 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 ...
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898 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 ...
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1answer
145 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 ...
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2answers
113 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 ...
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1answer
41 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 ...
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30 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 ...
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17 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?
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41 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 server....
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279 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 ...
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39 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 ...
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1answer
111 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. ...
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74 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 right......
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5k 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 ...
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2answers
114 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 ...
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2answers
175 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 ...
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2answers
92 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 ...
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47 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 ...
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1answer
107 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 ...
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2answers
305 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 ...
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166 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 ...
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113 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. ...
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133 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) ...
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188 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 ...
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34 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 ...
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101 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 ...
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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 ...