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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OS installation Problem

While installing Ubuntu 14.04 LTS on my PC i've been facing problems. Actually, Before Ubuntu i was used to of Windows family but few months back my motherboard(GIGABYTE) stopped working.then, I ...
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1answer
4k views

High CPU usage while playing Flash and using Jupiter

Hi guys from what I see by Googling around it's a common problem but somehow all the threads I've seen end in "Oooo Flash is terrible" and the post dies there. I'm experiencing a very high CPU usage ...
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2answers
374 views

Can I install a 64-bit version of Ubuntu on my 32-bit machine?

I have 3 GB of RAM. lscpu Architecture: i686 CPU op-mode(s): 32-bit, 64-bit
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0answers
13 views

Acer chromebook with Arm cortex A15 cpu?

I'm looking for a destop version for acer 13" chromebook with ARM Cortex-A15 by nvidia Kepler. Does/Will Ubuntu plan to support this ?
14
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3answers
26k views

How to determine if CPU VT extensions enabled in bios?

I know the command to figure out if a CPU can support VMware Workstation 8 or VMware Player 4: $ grep flags /proc/cpuinfo flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov ...
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1answer
28 views

Set CPU frequency scaling to wait one second before scaling down

I notice that my Kubuntu 14.10 system scales both CPU cores 1400-3400 MHz on a sub-second resolution. I believe that it is scaling down too quickly, as when I am running multiple heavy applications ...
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2answers
73 views

My CPU usage is unnecessarily high while creating a C program in Ubuntu 14.10

I have an MSI GE60 2PC Apache model Gamebook. I also use it for my collage work. It runs Ubuntu 14.10. I have a CPU usage problem while creating a ".c" file. I use the default text editor; while I ...
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1answer
48 views

Incorrect CPU temperature reprted (AMD fx-6300

Psensor and hardware sensors indicator both report an incredibly low temperature on my AMD fx-6300 cpu, below 20 degrees celcius. Below is a screenshot of what it looks like within Psensor: I have ...
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12 views

Ubuntu 14 Idle - Non Activity Causes Poor Performance

I'm having an issue with Ubuntu 14. I have a touch screen and I noticed after medium to long periods of inactivity the device "throttles down" and takes a few moments to snap back. When I tap the ...
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1answer
42 views

Number of Cores v. Processor Speed

The short question: is Ubuntu/Lubuntu designed to run/utilize multi (2+) core CPUs or is CPU speed the better approach for running these distros? I am designing a new PC and specing the CPU. I have ...
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1answer
240 views

indicator-multiload (System Load Indicator) don't show cpu usage correctly

I have accidentally deleted CPU usage percentage from indicator-multiload menu and now I can't remember what it syntax looks like and can't go back to how it was. Possibility 1 (simplest one). Can ...
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0answers
24 views

How to limit CPU usage for a process BEFORE starting it?

I read a few ways to limit CPU usage for a process, but all of them work after the process has started. I am looking for a way to do it before the process starts. Any ideas? Sorry if has already been ...
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5answers
19k views

How can I see how many processor cores are working?

I have quad-core processor system. I was using Windows before installing Ubuntu. Windows by-default was using 1 core* and I could change that with msconfig. How can I do this in Ubuntu or is it ...
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1answer
44 views

Ubuntu 12.04: memory always above 80% and swap around 50-60%

I have been using ubuntu 12.04 on my system for a long time. Suddenly the system has become too slow and cpu utlization is always above 80%. I have attached the screenshots which displays the usage at ...
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0answers
61 views

Team Fortress 2 using more CPU on Ubuntu 14.04 LTS than in Windows 8 [closed]

CPU: AMD A6-4400M APU with Radeon HD Graphics (Radeon HD 7520G) RAM: 8 GB (I use Ubuntu 64-bit) Driver using: X.org X server (not a proprietary driver) Also, I don't use wine for Team Fortress 2 ...
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1answer
58 views

What is the maximum RAM supported by the desktop and server editions?

I have just downloaded "ubuntu-14.04.1-desktop-amd64.iso" and "ubuntu-14.04.1-server-amd64.iso" through "http://www.ubuntu.com/". Please can someone confirm the maximum RAM that is supported. ...
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1answer
33 views

Ubuntu 14.04- 100% usage of one core

I just upgraded my Ubuntu to 14.04, and I have one small problem. One core of my i5-4670k is 100% used. There are no tasks in the background. How can I fix this?
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70 views

ASUS laptop overheating when using Ubuntu

I've got major problems while running Ubuntu. When I have my NVIDIA GeForce card enabled, the temperature of the processor is really high. Just a little web browsing rises it up to 70 degrees celcius ...
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1answer
72 views

Reduce CPU frequency in battery mode automatically

Is there any way to do that? Something like xbacklight and Cuttlefish
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1answer
80 views

TLP don't change CPU frequency

I check CPU clock speed with cat /proc/cpuinfo | grep "MHz", After sudo tlp start and sudo tlp bat still frequency is 2100MHz (Maximum). Could you please help me to solve this problem? I'm using ...
4
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4answers
5k views

Dropbox very high CPU usage without any actual data transfer

The Dropbox process constantly clocks more than 50% CPU usage sometimes going up to the higher 80s and 90s. At the same time it does not even upload/download the files it is supposed to. The progress ...
0
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1answer
21 views

Number of cores seen by sensors

The system monitor shows 4 cores, while the output from the sensors contains info only for two cores. What is the reason of that? My cpu is Intel(R) Core(TM) i5-3317U
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1answer
58 views

Ubuntu 14.04 64 bit slow how to fix?

I upgraded from Ubuntu 12.XX 32 bit to 14.04 64 bit, but the Ubuntu became slow, I have the below CPU specs with 4 GB RAM, what is the solution? salim@salim-desktop:~$ lscpu Architecture: ...
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1answer
65 views

Xubuntu 14.10 - after upgrade from 14.04 CPU Scaling not working

i upgrade my system from 14.04 to 14.10 and after that indicator-cpufreq was showing only two options: powersave and performance. After doing this: http://askubuntu.com/a/541412/353763 I was able to ...
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1answer
46 views

L1 + L2 cache hardware information with lscpu different to information from Intel & Windows

My CPU is an INTEL Celeron N2930 Bay Trail-M 1.83GHZ to (2.16GHZ Turbo) I get by typing lscpu in Terminal a different value of L1 + L2 Cache (Hardware Information) in comparison to the Intel + ...
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0answers
38 views

Ubuntu 14.04.1 strange CPU increase

I have installed Ubuntu 14.04.1 64bit, kernel 3.13 on a Dell R630 server. I notice very strange behaviour. When I open top, I see that CPU has increased significantly for certain processes (custom ...
43
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7answers
100k views

Kworker, what is it and why is it hogging so much CPU?

I recently upgraded to the Kubuntu Natty Beta 1 and I've been having a lot of issues with the process kworker. At moments it uses almost half my CPU. Also, strangely enough it seems to affect my USB ...
2
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1answer
382 views

How to automatically restart an application for using too much RAM or CPU

I'm going to be running an Ubuntu 14.04 LTS server that will have a few Garry's Mod (Half-life 2/Source based) servers running on it. I don't want any one of those servers getting out of line by ...
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0answers
47 views

Problem after upgrading CPU on Acer Aspire 5720

I have an Acer Aspire 5720 with integrated Intel graphics and it is set up to dual boot Vista and ubuntu 14.04 LTS. From new the laptop came with an Intel T7300 2.00 Ghz CPU and 1 GB DDR2 RAM. A few ...
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0answers
542 views

100% I/O usage due to jbd2

I have 14.04 Beta 2 64-bit and Intel i7 Processor with 2.2Ghz clock, 4 GB RAM and 500 GB Harddrive. After using Ubuntu for some time, everything goes so slow and I cannot even move my USB mouse ...
16
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4answers
23k views

Why does kworker cpu usage get so high?

I recently installed Ubuntu 12.04 on my Samsung laptop alongside Windows 7. Whenever I use Ubuntu (even when its idle) kworker uses almost 90% of one of 8-cores. Even though it doesn't really affect ...
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2answers
105 views

How to enable cpuset on Ubuntu 12.04?

I have set up CPU sets with cset in Ubuntu 12.04, but they are not respected. Processes just use all the CPU they can, no matter what set they are assigned to. It seems that cpuset is not enabled. ...
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7answers
108k views
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1answer
184 views

Lubuntu 14.10 High CPU usage and choppy video playing

I have an Asus Notebook (2007) with 1 gb ram and 900 Mhz Mobile Intel® 915GM/GMS, 910GML Express Graphics. I use Lubuntu 14.10 with about 300 mb memory usage,but the problem is high CPU usage(100 %) ...
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1answer
379 views

What causes high CPU usage by mount.ntfs?

I'm in Ubuntu 14.04 64-bit. mount.ntfs use high CPU--40%. I have Intel Core i5-3210M. Why is this happening? lsblk: NAME FSTYPE SIZE MOUNTPOINT LABEL sda 465.8G ...
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0answers
70 views

Overclocking with Ubuntu

I overclocked my CPU in BIOS using a multiplier. Everything in Ubuntu still shows the CPU frequency is stock. Is the CPU running at stock frequency, or is it overclocked like it's supposed to be? Is ...
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5answers
9k views

watchdog/0 process using all my CPU suddenly

I have a fresh installation of Ubuntu 12.04, I have been running it for about a week. Suddenly today I noticed my computer freezes every 5 seconds. I restarted the computer and I still get this. I ...
0
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1answer
59 views

CPUs usage 100%

System is an Atom(MSI Wind Notebook) that was upgraded to 14LTS from 12LTS. Both CPUs are running @ 100%. System Monitor doesn't show anthing but 6-0 % usages. Some spikes of the xringd, compiz, munin ...
0
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1answer
302 views

AMD E1-6010 1.35GHz slow performance?

I have just installed the 64bit version of ubuntu 14.04.1 LTS version on my low-end laptop which has a AMD Dual-Core E1-6010 Accelerated Processor (1.35GHz, 1MB L2 Cache) and 4g of ram. Been switched ...
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0answers
60 views

High CPU utilization

I have noticed recently a high CPU utilization in Ubuntu. It seems to occur often when I use Eclipse which is a java-based IDE, but I have noticed it occurring even when Java is not running. I have ...
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1answer
71 views

multi-core usage, biased towards core 2?

I have 4 cores in my system. Core 2 is frequently showing 100% usage in htop. Meanwhile Core 1,3,4 show something around 5% most of the time. Is this normal? Is there a way to better distribute Core ...
3
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0answers
170 views

How to set governors for Intel to work as old good ondemand?

I used to work on my laptop on ondemand governor, which was switching CPU frequency depending on CPU usage. It worked quite nice for years and had three very important advantages: low hardware ...
0
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0answers
18 views

Can I tap my notebook to a powerful stationary computer's CPU / GPU / RAM resources example via LAN?

THE GENESIS Currently I have a little experience with NoMachine, a great tool for cross-OS remote desktop, however this program has problems with H264 support while the codecs are actually working on ...
0
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2answers
73 views

“sensors/sensors.h: No such file or directory”

I download the latest stable version of psensor: psensor-1.0.4. I try to install it from source on Ubuntu 12.04. ./configure generates a Makefile, But when I run make, psensor.h:22:29: fatal error: ...
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0answers
71 views

Only 8 cores on Ubuntu 12.04 Desktop 32bit with Intel(R) Core(TM) i7-5820K CPU @ 3.30GHz

I got the new build machine with Intel(R) Core(TM) i7-5820K CPU @ 3.30GHz which has 6 cores and support 12 hyper thread. I installed Ubuntu 12.04 LTS 32bit Desktop version and looked at ...
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30 views

ubuntu halts itself in high cpu workload

I have Core i3 M370 laptop. When i do high cpu intensive tasks such as kernel compilation with make -j4, the system halts itself. It doesn't happen like instant crashing. It happens like "shutdown -h ...
0
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1answer
30 views

How to get more CPU information than by the usual ways?

I'm familiar with uname, lscpu, hwinfo, lshw, and less /proc/cpuinfo. But! None of those are telling me what I want to know about my processor. ATLAS lists these processor types: Intel PIII, with ...
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1answer
323 views

high CPU load all the time

Simply, My PC is Crap, it has Pentium 4 3GHz 2MB Cache CPU with Intel graphics G31/G33 and 1GB RAM on normal work, such as using firefox, the CPU use is more than 50%, and if i opened more than 5 ...
0
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1answer
101 views

Turbo Boost work with Ubuntu [duplicate]

My notebook has an Intel Core i5-4200U 1.6GHz with Turbo Boost to 2.6GHz. My question is, will Turbo Boost work with Ubuntu?
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1answer
104 views

Should I turn on Hyperthreading on lubuntu 14.04?

Pentium 4 HT @ 3.20 Ghz Ram: 1536 MB Lubuntu 14.04 LTS To be clear, I want to know whether HT would slow Lubuntu down or not. I use it for daily use such as using Google Chrome (to be specific) and ...