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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this kernel requires an x86-64 CPU, but only detected an i686 CPU But i have a 64bit PC! [duplicate]

I am on 64-bit Windows 8.1. I'm trying to install Ubuntu on VirtualBox. However, I get the error: this kernel requires an x86-64 CPU, but only detected an i686 CPU Unable to boot - please use a ...
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2answers
849 views

Nvidia 331 driver, Ubuntu 14.04 and Wine - lags, fps drops and surprising, temporary boost

I experience weird fps drops while playing games, mostly with Wine. Some tested games: Hearthstone - fps drops happens pretty often; interesting fact is that while browsing cards every page needs ...
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1answer
45 views

Priority goes back to 20 after changing it to -10

I want to change the priority of a process in LTS 14.04. I used sudo renice -10 -p PID It worked fine, but after a while the priority of that process goes back to 20. What should I do to get rid ...
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12 views

Subdivide CPU usage among different tasks in LTS 14.04 [duplicate]

I am fairly new to UBUNTU and maybe this is a naive question. I am working on a PC with multiple CPUs and I was wondering if there is a way to select how many CPUs a process has to use. For example: ...
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1answer
1k views

mtrr log says that my BIOS doesn't use all CPU's?

In my dmesg log I see the following lines about my CPU not having al CPU's set up. [ 0.211558] mtrr: your CPUs had inconsistent variable MTRR settings [ 0.211559] mtrr: probably your BIOS does ...
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1answer
273 views

fan control issues on Toshiba Satellite c655d-s5136

On Ubuntu 14.04, my fan always runs,even when idle. This is not the case when I am in Win7,in which it only runs when I am playing movies. This bothers me greatly and I have followed other threads ...
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2answers
303 views

My machine is 32 bit, but i have 64 bit processor. Should I install 64 bit ubuntu?

I was interested in what machine do i have so after sudo lshw I've got info, but there is one thing that puzzles me. It writhes that my laptop is 32 width, but for cpu that it is 64 width ...
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2answers
6k 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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1answer
275 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
461 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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27 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
185 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
146 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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1answer
222 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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2answers
519 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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1answer
2k 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 ...
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1answer
48 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
682 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
464 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
316 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
334 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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1answer
701 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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1answer
516 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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2answers
1k 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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1answer
3k 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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1answer
538 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 ...
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2answers
2k 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 ...
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1answer
85 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 ...
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81 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 ...
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1answer
145 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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702 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
293 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 ...
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2answers
21 views

Restricting resources of user applications

Sometimes, either because of a memory leak or the computationally-intensive nature of a program, applications can start to slow down and ultimately freeze the whole system by claiming too much RAM or ...
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2answers
790 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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151 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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523 views

16 cores are not being utilized out of 80 cores

Recently I discovered that our server does not utilize all 80 threads anymore in the system. It looks like if 16 cores are always idle, despite the high system load. Its a Dell powerEdge R900 server, ...
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227 views

CPU high usage with no reason

I am experiencing high CPU usage and overheating with Ubuntu 14.04 on a Dell Inspiron-N5110 laptop, seemingly for no reason. CPU: Intel(R) Core(TM) i3-2350M CPU @ 2.30GHz Cadencé à 2.30 GHz RAM: 4 ...
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226 views

After upgrading my CPU cpufrequtils does not work

After upgrading my CPU (nothing else changed on my system) I can't change the governor of my CPU. I tried reinstalling cpufrequtils, but got the following error: Setting up cpufrequtils (008-1) ... ...
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1answer
170 views

Why my PC turned off unexpectedly?

Let me tell the complete story. I have a normal PC with monitor, CPU, UPS, mouse and a keyboard. I use Ubuntu 12.04 LTS. For the last 15 days my computer is shutting down unexpectedly. Here in my case ...
0
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1answer
300 views

provide more than one processor with taskset

I am using taskset to assign CPU cores 4-7 to a java process that normally uses ~200-400% CPU. The cores 4-7 were isolated on boot so only the java process should run on them. Eventually taskset ...
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2answers
623 views

Why does Ubuntu only recognize four processors?

I have ubuntu 14.04 and windows 7 in dual boot. My processor is the Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz. The problem is that ubuntu detects only 4 core but they should be 8 !! Is it a known ...
0
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1answer
150 views

Psensor warning - What does it mean?

I installed Psensor because I have had a new comp with problems, it sometimes freezes up on me. This might be caused by heat but it could be another cause. After implementing all sensors, Psensor ...
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2answers
711 views

how to fix ubuntu overheating

I'm new to Ubuntu but not to Linux and this is the first time overheating has been an issue for me. I'm using the latest version with all the updates installed and my computer has a Intel Core i5-...
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218 views

Java & High CPU usage

I use a certain java application to trade the stock market and it consumes 90% my CPU power. And the CPU temp usually remains around 90c. This is a real headache. What causes this problem and what are ...
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143 views

CPU usage varies from 0 to 100. Strange waveform

so I have a strange problem. I'm currently using an old Thinkpad T61 and Ubuntu 14.04 LTS, although this same problem was also happening when I had elementary OS Luna (based on ubuntu 12.04 LTS) ...
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1answer
3k views

lm-sensors not detecting my fan

sensors-detect detects my system perfectly: # sensors-detect revision 6209 (2014-01-14 22:51:58 +0100) # System: Acer Aspire E1-572 [V2.14] (laptop) # Board: Acer EA50_HW It detects an Intel ...
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1answer
1k views

AMD APU-A4-5000 processor issue

I have recently installed Ubuntu 14.04 on my Toshiba Satellite C50D-A 40010 Laptop (PSCGYG-00J00J). My AMD A4 processor's speed is 1.5GHz but Ubuntu shows it as 800MHz. dharmesh@home:~$ cat /proc/...
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1answer
117 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 ...
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1answer
1k 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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3answers
47k views

How I can disable CPU frequency scaling and set the system to performance?

My processor is running at 40% of its maximum speed, I want it to use 100% of the speed, all the time. I searched on Google but the tutorials are very old and they all differ. So, how can I ...