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Questions tagged [cpu]

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.

1439 questions
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How do I get the CPU temperature?

How do I get the CPU temperature?
trampster
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275
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20 answers

Any way to check the clock speed of my processor?

Is there any way to check at which clock speed my processor is running? I have already tried cat /proc/cpuinfo but the clock speed I'm running isn't showing. I know Ubuntu 12.04 (Precise Pangolin) requires 700 MHz and VGA, but will an AMD Mobile…
user1610406
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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 ports; whenever I plug in an USB drive, the…
davorao
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9 answers

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 installed? *-logicalcpu:0 description: Logical CPU …
Toby
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3 answers

How/Where do I check my ubuntu laptops's CPU usage?

How/Where do I check my ubuntu laptops's CPU usage?
Lisa
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5 answers

CPU benchmarking utility for Linux

I am looking for a utility that will benchmark CPU performance under single and multi threaded instances. At present I have an old rig with a dual core CPU (E7500) at 3.6 Ghz and I am looking at replacing it with a quad core CPU (Q9400) at 3.2…
fatso
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92
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9 answers

Ubuntu 18.04 gnome-shell high CPU usage

I installed 18.04 from 17.04 (passing briefly through 17.10, didn't test it and jumped to 18.04) and I am experiencing a high cpu usage on gnome-shell, it takes almost all available CPU time: $ top top - 06:23:01 up 40 min, 3 users, load average:…
Leandro
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78
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7 answers

How can I add the current CPU usage to my menu bar as a percentage?

I'm used to OS X and I use MenuMeters in my menu bar to monitor CPU usage as a percentage and memory as used/free totals. I really want to add this functionality in Ubuntu as I'm using it for development. I've seen that you can add graphs. Graphs…
daviesgeek
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3 answers

What is the difference between x86_64 amd64 and 64 bit?

I use a x86_64 bit Ubuntu, but whenever I try to do a live boot of any other 64 bit images like the GNOME 3.16 which was released yesterday, it does not work? Also some times when I try a virtual machine of a 64 bit image, it does not work…
jgm
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59
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4 answers

Cores vs Threads: How many threads should I run on this machine?

How many threads should I run on this machine? My lscpu says there are 96 cores. Are those physical cores? What is the maximum and optimal thread that I can run on this machine? https://stackoverflow.com/a/10670440/610569 show that I can run over 20…
alvas
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10 answers

Set CPU governor to performance in 18.04

I'm trying to set the CPU governor to performance in 18.04, the problem is that it never survives reboots. I've tried following these steps in an answer to this question How to set "Performance" instead of "Powersave" as default? but when I reboot…
Falc
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3 answers

How to determine if CPU VT extensions are 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 pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht…
pcapademic
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51
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5 answers

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 necessary? Windows was using one core for booting.
user132840
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7 answers

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 permanently disable CPU frequency scaling and set my system…
Removed
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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 its actually a sum of usages across different…
Poonam Srivatava
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