Tagged Questions

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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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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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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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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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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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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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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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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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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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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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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35 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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Hangup during boot “Starting CPU interrupts balancing daemon”. Ubuntu Server 14.04

halp me plz. I don't know how this would affect anything, but the last change I made to my server was deleting and replacing the ssl keys in /etc/nginx/ssl I am using an AMD Phenom II X4 960T. ...
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Team Fortress 2 using too much CPU on Ubuntu 14.04 LTS

CPU: AMD A6-4400M APU x2 (not sure if it is two physical CPUs or cores don't know a lot about that) with Radeon HD Graphics (Radeon HD 7520G) RAM: Ubuntu says it is 7.2 GB but I installed 8 GB (I use ...
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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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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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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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ASUS X101h high temperatur

I have ASUS X101h netbook and installed all debian/ubuntu/arc/redhat/fedora etc.. distros. In all situations, virtual device temperature and CPU temperature is too high.(When I open firefox and open ...
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Is there anyway i can control my CPU fan speed on my linux server?

Is there anyway i can control my CPU fan speed on my linux server? It is really noisy and running at 100% even though it doesnt need to. Any help thanks
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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 ...
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1answer
45 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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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 ...
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38 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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232 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 ...
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35 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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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
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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
79 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 ...
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37 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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111 views

Cpu temp at 70°C, fans at minium

I'm running Ubuntu Server 14.04, and the cpu temp is at 72 degrees, but the fans are still at minium. I Can just hear them. Normally they are noisier than planes. My cpu overheats if the fans don't ...
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99 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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2answers
298 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 ...
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1answer
58 views

CPU Temparature above threshold

My PC is running Ubuntu 14.04 currently. For last two days, the PC does not turn on. On running recovery mode, the message "CPU Temperature above threshold" shows. Sometimes the PC do start, only to ...
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1answer
40 views

Intel i5 with speedstep

I have an intel i5 @ 1.70Ghz and in Windows 8 I regularly saw it spike to as high as 2.26Ghz and once to 3.1Ghz. Using 14.04 LTS, is my proc behaving the same? In scaling_available_frequencies I'm ...
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1answer
45 views

Ubuntu Linux 14.04 LTS Server Edition information need

I was wondering what's the maximum RAM, and maximum CPUs does the Ubuntu Linux 14.04 LTS Server Edition can handle. I found a server computer I want to buy, which is a SuperServer 4048B-TRFT. I don't ...
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170 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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1answer
221 views

How do I discover my socket type?

I want to upgrade my CPU, but Ubuntu's "About This Computer" window only gives me "Intel® Core™ i3 CPU 530 @ 2.93GHz × 4", so no information on the connector/socket type. So far, I've tried the ...
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952 views

Does my computer have 1 or 2 CPUs? (cpuinfo and lscpu differ)

When I run cat /proc/cpuinfo I get the following output (only the relevant line included): cpu cores: 1 However, lscpu gives me the following output: CPU(s): 2 Which of the two is correct, and ...
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68 views

Hardware Virtualization not possible, virtualbox alternatives?

I have two processors, but virtualbox won't accept that unless I have hardware virtualization (vt-x) enabled, for which my bios setup doesn't give an option, and the option was never added in bios ...
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108 views

High CPU usage compared to WinXP. Common aps and actions use 100% CPU cycles

I'm running Lubunto 14.04.1 LTS. PC is a 2004 HP ze4200 laptop: 1.8 ghz Celeron M with 1 gb RAM and 80 gb drive. Was running fine on WinXP SP3 and I cleaned the drive off to test Lubuntu 14 LTS. No ...
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103 views

Ubuntu Gnome 14.04 - 100% CPU usage alternating between cores

I've noticed my Ubuntu Gnome 14.04 has been getting a bit sluggish lately - things like Gnome Shell overview animation are jerky where they were lightning fast, Elder Scrolls Online is stuttering and ...
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Intel graphics driver installer, now the CPU fan is rarely quiet

I have an Optimus chipset: Intel HD 4000 (i7-3635QM CPU) Geforce 640m I don't care about the NVIDIA card, so I didn't try to install any proprietary drivers for it. So: I was having a ...
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1answer
35 views

Can I disable processor drivers

My Toshiba laptop freezes when I plug in the AC Power cord.I fix this problem in windows 7 by going into Safe Mode then Control Panel > Device Manager > Processors and disable both of them. What I am ...
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1answer
484 views

Much lower temps on Ubuntu [closed]

I've noticed that CPU temps and GPU on my laptop are much lower on Ubuntu than Windows 7. On Windows temperature is like 50 celsius to 58 and on Ubuntu 40 to 50 max. Cooling is also much cooler on ...
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1answer
54 views

Will Ubuntu continue working properly after a new motherboard/CPU is installed?

So, I installed the new motherboard and new CPU. Then powered on the PC. The bootstrapping went fine and all seems to work. But I have doubts. Do I need to do something?
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Is this CPU architecture information from lscpu normal?

With command lscpu I have output as follows: Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 4 On-line CPU(s) list: ...
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2answers
279 views

I want to find out if my Lenovo laptop has a Sandy or Ivy Bridge

Is there a command or a register to find this information on my laptop? I need to know it before I install Intel pstate. Thanks. PS This is the result from the command from ...
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Getting Linux to downclock and lower the V-core of my CPU at idle

So when I boot into my Windows 8 partition, Windows automatically downclocks my CPU and lowers it's V-core so that the idle temps of my i5-4570 CPU go down to 25 C. Now on Ubuntu on the other hand, ...
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How do I check the current frequency of my CPU? [duplicate]

I've been trying to find some information on this but seem to only find things similar but not exactly the same. I'm using Xubuntu on my notebook with an core i7 processor which does hyper-threading ...
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1answer
77 views

Respect BIOS-specified CPU speed without kernel patches, etc. in 14.04

I've got a machine running "in the wild" in a very hot environment running an AMD chip which is overheating. I don't have physical access to the machine, but I have had someone change the CPU clock ...
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1answer
86 views

How to check the cpu temperatures core by core?

I have a Phenom X3-8450e which has a total of 3 cores. But when i ran "sensors" on a terminal this is what i get. user@PC ~ $ sensors atk0110-acpi-0 Adapter: ACPI interface ...