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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How do you hotplug enable new CPU and RAM in a Virtual Machine

I am running Ubuntu in a virtual machine and I'd like to add CPU and RAM without rebooting the device. How can I hotplug this new virtual hardware?
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Can't disable turbo boost since Ubuntu 16.04

I've recently updated to Ubuntu latest LTS. My computer suffers from bad cooling management, and I need to be able to disable turbo boost in order to use it comfortably. I had a script that was doing ...
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1answer
37 views

KswapD0 use 100% CPU

After upgrde from 15.10 to 16.04, I noticed my netbook fan was constantly turning at full throtle. I checked the process mnitoor and noticed KswapD0 used 100% of one core. What is the problem ? ...
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1answer
7k views

Should I activate the additional driver: Processor microcode firmware for Intel CPUs for intel-microcode

I have recently noticed that there is an additional driver called Unknown: Unknown here which was not there before: I have already read this, and understand why it is there, but my question is, ...
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1answer
10 views

totem-video-thumbnailer uses almost all CPU power

After upgrading from Ubuntu 14.04 LTS to 16.04 LTS, my laptop gets hotter and uses almost all CPU power. How to fix it? Thanks a lot for your answer...
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1answer
30 views

How to run a job in several machines that have Ubuntu as operating system

I need to run a job in several virtual machines exists in a specific cloud and I have the IP address for all of them and I configured the hostname for all of them. How to run a command in a network of ...
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3answers
6k views

Why does chrome use excessive amounts of CPU?

Synopsis For the past few weeks, i've really started to notice a process on my machine hitting the CPU. So today I have taken a look into it, to find that Chrome is running about 100% CPU. Is ...
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4answers
17k views

Getting Processor Information

I have just ran lshw to get some information about a machine I know nothing about, and I just wanted to confirm something. Does this basically mean it is a dual core 64 bit processor that is ...
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0answers
5 views

Have: HP ENVY Desktop - 750-167c - Updated to Ubuntu 16.4, Need HW support

Have: HP ENVY Desktop - 750-167c Updated to Ubuntu 16.4 Need HW support! I keep getting an "HP update drivers" box when I boot the system. I click "OK" and nothing happens other than the next time I ...
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3answers
17k views

High CPU usage even when no application is running(Desktop)

I always have high CPU usage in Ubuntu in every version of it that I have used. I have been using Ubuntu from 10.04 version. My CPU usage even at idle is more than 30% for each core(unlike Windows 7 ...
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2answers
132 views

Does Ubuntu 16.04 support intel 64 bit processers [duplicate]

I am using Ubuntu 14.04 32-bit LTS for a while and I'd love to try Ubuntu 16.04 64-bit LTS. In Ubuntu download page I found 64-bit ISO image as ubuntu-16.04-desktop-amd64.iso, I am bit confused ...
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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
96 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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2answers
6k views

Maximum CPU frequency stuck at low value

I have observed a problem with Ubuntu 13.04. The problem was not there on 11.10 I used earlier. The maximum CPU frequency is stuck at 2GHzon my Intel(R) Core(TM) i7-2620M CPU @ 2.70GHz (Dell Lattitude ...
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4answers
916 views

Ubuntu 15.04 with intel_pstate - low current cpu frequency

I've got Ubuntu 15.04 running on desktop with 6-core 5930K processor, msi x99s motherboard, 32gb ram, ssd and nvidia gtx 980ti. Quite surprisingly, the overall system performance is way lower than ...
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1answer
25 views

Installing gfortran and mpich for a new Ubuntu user

I am a long-term Mac user who is considering switching to Ubuntu. I am not a system guru. I program in fortran and mpi for cfd applications on high-performance computers. I am considering ...
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1answer
49 views

BayTrail CPU and Ubuntu 15.10

I have a machine with an Asrock q1900b-itx mobo and I'm experiencing random freezes of the system. By freeze I mean everything hangs and there is absolutely nothing that can be done except reset. I've ...
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0answers
22 views

How to force enable Turbo Core (AMD) on Ubuntu 15.10?

I'm running a Samsung Ativ Book 9 lite with Ubuntu 15.10 installed. The processor is supposedly equivalent to an A6-1450 Temash 1.0 GHz (1.4GHz boost) The problem I'm having is that turbo mode only ...
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6answers
14k 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 ...
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0answers
28 views

Inspiron 15 fan doesn't work

System configuration Win10 and Xubuntu 15.04 Dual boot i5 4200U Radeon 8850M Latest BIOS from dell tlp on Xubuntu installed. No more tweaks. coretemp module was loaded fglrx is not installed Idle ...
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1answer
26 views

Does Ubuntu already support Intel Speed Shift?

Does Ubuntu already support Intel Speed Shift? If not, when will it support Intel Speed Shift? I'm looking forward to use it with my new Skylake Mobile CPU.
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0answers
19 views

kworker CPU hog - waking up from suspend

I have the (apparently very common) problem of 'kworker' hogging CPU usage. As mentioned here, the solution for many is identifying the problematic 'gpe'. This solution seems to apply to my situation, ...
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0answers
16 views

indicator-cpufreq frequency lost after suspension/hibernation

As the title, I'm using indicator-cpufreq to set the frequency of the CPU. It's really useful when you are on battery and you want to save some power. However, when I wake the laptop after a ...
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0answers
32 views

CPU frequency cannot be changed 15.10

I cannot change my CPU frequency. It is stuck on 800 MHz. None of the usual avenues are working. How can I change system policy?
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1answer
43 views

Throttling stuck below limits on a cool cpu

This is an issue widely discussed earlier. Still, none of the suggested methods/procedures has worked for me. I'm running Ubuntu 14.04, kernel 4.4.0-040400-generic on a fanless mini computer, Intel ...
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0answers
14 views

Monitor CPU and bandwidth usage of cpu and save to csv

I would like to monitor a specific process. I need to know timestamp, CPU usage (%) and Bandwidth (tcp upload and download in % or byte/s) of this process. I have tried something like this: ps -Ao ...
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1answer
257 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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1answer
1k views

what is the difference between x86_64 amd64 and 64 bit

what is the difference between x86_64 amd64 and 64 bit ? I think its a stupid question but still. I use a x86_64 bit Ubuntu, but when ever I try to do a live boot of any other 64 bit images like the ...
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2answers
33 views

Ubuntu 15.10 unable to detect all CPUs

lscpu lists the following venki@venki-H8DCL:~$ lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 12 On-line ...
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2answers
208 views

How do I diagnose a sudden slowdown

Running a particularly compute-intensive task on my computer (Tecra W50) for more than a few seconds causes it to become very slow. Performance does not return to normal after the task completes. ...
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0answers
54 views

Reduce load average on Ubuntu 14.04

How to I reduce the average CPU load on Ubuntu 14.04? I have a low end PC and whenever I start Google Chrome the load average is at ~2,5-3 My Computer Specifications are: Intel(R) Celeron(R) CPU ...
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0answers
26 views

Question on Ubuntu 15.10 high CPU usage again

I have a clean installation of 15.10. Recently the system may suddenly go into high CPU usage. I tried to search the for the answer. The answer is typical to check with process is using the CPU. But ...
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1answer
222 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 ...
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0answers
43 views

Can't install software because Ubuntu thinks my Intel processor is an AMD

Today I have tried to update Chrome and also to install XnView (photo viewing software) on my desktop machine with an Intel® Core™2 Quad CPU Q6600 @ 2.40GHz × 4. Each time I get a message that I have ...
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1answer
28 views

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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0answers
33 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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0answers
147 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
44 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 ...
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0answers
64 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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4answers
23k views

Is Ubuntu optimized for multicore CPUs?

Does Ubuntu make use of multicore CPUs (as Windows 7 is said to do)? In other words, is it multitasking optimized so that users will take benefit of 4+ core processors?
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2answers
3k views

14.04, I have Disabled CPU throttling, but installing Atlas says: “CPU Throttling apparently enabled”

My PC is using ubuntu 14.04, and I need install Atlas. Atlas says: it need to disable CPU throttling, I have done the job to disable it. cat ...
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1answer
56 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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0answers
64 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
61 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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2answers
182 views

what could possible take 100% cpu but not show up in (sudo) top

When I start intellij, which loads an "haxe" project at startup, it sometimes happens that intellij hangs loading. I than start htop (also tried top) with "sudo". iotop is also not showing anything ...
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2answers
41 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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0answers
17 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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0answers
27 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' ...
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1answer
27 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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2answers
191 views

How to restore the cpu frequency defaults or to align the frequency at will?

I really new at ubuntu and linux so i am not capable of understand the following: usage: update-rc.d [-n] [-f] <basename> remove update-rc.d [-n] <basename> defaults [NN | ...