Questions tagged [cpuinfo]

cpuinfo is a virtual file located in the /proc filesystem. When accessed, it provides real-time information both about unchanging hardware characteristics of the CPU, and about how it is currently running (most notably, what clock speed it or each of its cores is at).

Filter by
Sorted by
Tagged with
0 votes
0 answers
22 views

How to estimate the L2 shared memory usage on Ubuntu

I'm trying to improve the performance of one of our systems and I'm supposing that the bottleneck resides on the L2 shared memory of my CPU. Thus, I'm looking for a way to estimate how much of my CPU ...
user avatar
  • 365
1 vote
0 answers
327 views

ALL CPU's stuck at 800Mhz ubuntu 20.04.3

Cpu's all stuck at 800Mhz I type in watch -n1 "cat /proc/cpuinfo | grep MHz" (to see cpu's) No matter what I do, I launch a large program and render an animation in Blender or use Octave to ...
user avatar
  • 1,835
1 vote
0 answers
56 views

/proc/cpuinfo security

I find that some applications want to check /proc/cpuinfo but don't have access This is on my server running Ubuntu 20.04.2 LTS, the permissions are: -rw-r----- 1 root root 0 May 2 14:35 /proc/...
user avatar
  • 2,518
2 votes
1 answer
2k views

Showing total CPU usage by using htop

Online I found the following figure where you can see "CPU" as first row and it should represent the total amount of the used CPU. Amongst the options of the htop I run on my PC there isn't ...
user avatar
1 vote
2 answers
2k views

Ubuntu 20.04. overclocks intel i7-9700k automatically?

I have a new intel i7-9700k running in ubuntu 20.04. This processor should clock at base frequency 3.6 GHz with maximum frequency 4.9 GHz in overclocking. I did an expensive computation today and took ...
user avatar
  • 11
0 votes
0 answers
197 views

how to get arm specific cpu info on arm-based ubuntu

Is there ARM specific hardware information utilities for CPU, Graphic card, etc.? lshw, inxi, /proc/cpuinfo are well known utilities or method but it does not provide ARM specific informations such ...
user avatar
  • 101
1 vote
0 answers
45 views

Dual pentium m install

I have recently acquired a number of embedded touch screen computers to tinker with. One of them has two CPUs in one machine. I have managed to install and run various versions of Ubuntu and other ...
user avatar
0 votes
1 answer
91 views

Is /proc/cpuinfo locale dependent?

I want to parse the cpu MHz field in /proc/cpuinfo to a float number. In different locales, the . of 2599.998 can be ,. I changed my locale to be pt_PT and I see the output is still 2599.998 (with .)...
user avatar
  • 111
-1 votes
1 answer
1k views

Wrong number of cpu cores in /proc/cpuinfo

I am running Ubuntu 18.04 server. I have an Intel i9 9980xe CPU, which has 18 cores and 2 threads per core. But it shows that the CPU has only 15 cores in /proc/cpuinfo as well as in htop. Why? Here ...
user avatar
2 votes
1 answer
3k views

which info is the true about cpu cores?

i have a question about my actual number of cpus on my machine. Different methods give me different results... htop shows 4 cores working lscpu | grep CPU\(s\): shows 4 cat /proc/cpuinfo | grep ...
user avatar
2 votes
0 answers
937 views

High CPU Usage - No command

I've had an issue over the last few days with high CPU usage. It's at a very constant ~60%. I have tried using htop to identify the culprit, but unfortunately the command section is blank (as below) ...
user avatar
20 votes
2 answers
60k views

Is there any Widget that can show my CPU and other performances live?

I am ubuntu user currently working on Image Processing Project, I need to have a constant look at my CPU and Ram usage which is shown in system monitor very clearly but I have to switch between system ...
user avatar
1 vote
2 answers
2k views

CPU governor not adhering to CPU Min/Max settings

Tried to force CPU to run at max speed after it refused to do so under times when CPU usage definitely should be at max, did so by manually setting governor to 'performance'. This didn't work, CPU ...
user avatar
2 votes
0 answers
131 views

How to get cpuinfo to show Turbo frequency? [duplicate]

How do I get the frequency of my CPU when it is turbo boosted to show up in cpuinfo?
user avatar
6 votes
3 answers
11k views

How do I get the model name of my processor?

I am making a conky config and I want to display the CPU model as one of the stats. For this, I need a command that outputs just the CPU name as a string, for example, "Intel Core i7 7700K". I think ...
user avatar
0 votes
1 answer
1k views

How do I get conky to display the CPU frequency per core in GHz?

I am trying to get Conky to display the CPU frequency per core, but it only displays it for the first one. I know I can get a frequency in MHz, but how would I get it in GHz?
user avatar
2 votes
0 answers
58 views

Ubuntu 14.04 - Processor details is empty

while installing ubuntu via JetPack [ it's Nvidia Jetson TX1 embedded board - supports full OS installation ] the processor details as shown in the image below is empty. the OS keeps hanging and ...
user avatar
-1 votes
1 answer
1k views

Ubuntu 16.04.1 does not detect AES-NI on my cpu

I recently upgraded my CPU from a Pentium B950 to an i5-2520M. The intel page says that my new CPU supports their aes extensions, but both /etc/cpuinfo and cpuid say that it doesn't. Other than that, ...
user avatar
20 votes
1 answer
98k views

Getting information about CPU

I am new to the world of Linux and Ubuntu. I want say get maximum information about CPU. (cpufreq , no. of cores, no. of threads per core, instruction set, size of caches, instruction set, ...
user avatar
  • 557
5 votes
2 answers
3k views

Why does "top" show some processes running longer than the system's uptime?

I've got a problem with my system where phantomjs remains running after finishing its job. To debug this issue, two days ago I rebooted the system: Today when I ran top, I saw this: If I understand ...
user avatar
  • 389
4 votes
1 answer
3k views

CPU scaling: how can current frequency be out of min-max range?

I'm trying to understand why my CPUs don't run at higher frequencies (related link) Can someone explain me how is it possible that when a min and a max are defined, the effective value finally goes ...
user avatar
13 votes
3 answers
12k views

View size of CPU cache through the command-line?

How do I view the size of my CPU cache using the command-line? I want to view information on L1, L2 and L3 cache. Also, would it be possible to ouput only information on cache, so that all other ...
user avatar
  • 16.3k
209 votes
6 answers
292k views

How to find the number of CPU cores including virtual?

How do I find out the number of cores my CPU has, including virtual cores (hyper threading cores) using the command line?
user avatar
  • 16.3k
2 votes
1 answer
2k views

My CPU clock speed is changing constantly. Is it normal?

I am running Ubuntu 14.04 on my laptop, and whenever I run cat /proc/cpuinfo | grep "MHz" I get varying speeds. I thought that clockspeed is a fixed property, which can be under clocked or ...
user avatar
  • 5,299
1 vote
1 answer
328 views

KVM installation & Prerequisite

Before Installation of KVM we have to check our processor support visualization or not and we run a command i.e: egrep -c '(vmx|svm)' /proc/cpuinfo Which gives output 0/1/2/3/4 depends on processor ...
user avatar
9 votes
1 answer
4k views

System Monitor showing incorrect number of CPUs

I'm currently running Ubuntu 14.04.2 Desktop. The System Monitor tool is showing me 32 CPUs when I'm expecting 56. Should I be concerned? Screenshot of System Monitor: As you can see, it shows 32 ...
user avatar
0 votes
1 answer
2k 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/...
user avatar
7 votes
1 answer
13k 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 ...
user avatar
  • 2,848
3 votes
1 answer
2k views

Why does /proc/cpuinfo say "cpu cores: 2" on an AMD FX-4100 Quad-Core Processor

I'm trying to figure out how to interpret my /proc/cpuinfo. I've got an AMD FX-4100 quad-core and cpuinfo gives, as it should, 1 'physical id', 4 'core id's and 4 'siblings', but why does 'cpu cores' ...
user avatar
1 vote
1 answer
2k views

Minimum and maximum cpu frequency are equal

I just noticed my laptop stared working considerably slower. I am using an updated 13.04, though the issue did not start right after the upgrade. After tracking down the issue I noticed that both ...
user avatar
  • 905
2 votes
0 answers
940 views

Screenlets RingSensors has to many CPU sensors, what are they?

I just installed screenlets to get some onscreen information about my system. I'm trying the RingSensors screenlet to monitor cpu load, but there are more sensors available to monitor than I'd expect. ...
user avatar
  • 834
2 votes
1 answer
768 views

Power USB at certain CPU temperature

I have an unusual server set-up. Basically, I have a combination of salvaged parts from 3 Powerbook G4s running a non-graphical distribution of lubuntu. Problem is, I'm better with hardware than the ...
user avatar
10 votes
2 answers
5k views

Ubuntu System monitor shows 4 cpu while I have 2 cores

Acording to my laptop website and intel website, my CPU is Intel i5-2410M Processor Number i5-2410M Cores 2 Threads 4 Clock Speed 2.3 GHz Max Turbo Frequency 2.9 GHz so I have two cores, but why ...
user avatar
  • 541
2 votes
1 answer
535 views

Request about description regarding cpuinfo [closed]

Hi we all know that cat /proc/cpuinfo will provide us , but my request is i want to know the description about all the fields over there . I am giving you my PC information here. I think its not off ...
user avatar
  • 96.4k