Questions tagged [lscpu]
19 questions
34
votes
2 answers
Understanding output of lscpu
You can see the output from lscpu command -
jack@042:~$ lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 56
On-line CPU(s) list: 0-55
Thread(s) per core: …
cph_sto
- 443
- 1
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5
votes
1 answer
How can my cpu frequency be above maximum MHz value in lscpu?
How can it be, that my current cpu frequency (CPU MHz) for my Intel Core2 Duo T9400M is above max MHz while being on high load?
➜ lscpu
[...]
Model name: Intel(R) Core(TM)2 Duo CPU T9400M @ 2.53GHz
Stepping: 10
CPU MHz: …
0xnoob
- 153
- 5
3
votes
1 answer
How to reliably tell from Linux whether the CPU supports Hyperthreading, even if Hyperthreading is disabled?
The following is what I am doing to tell whether a processor does support HT or not, regardless of whether it is enabled or disabled:
# dmidecode -t processor | grep "Hardware Thread" | wc -l
If result is 0, then the processor does not support…
Raulinbonn
- 66
- 7
3
votes
0 answers
cpupower frequency-set does not work
So I have this Dual Intel Silver 4116 CPU server that will set the MHz to 132 randomly, the server becomes unusable after that point. Even reboots don't restore the MHz, only driving to the data centre and powering off the server for 10 seconds or…
Roderick Obrist
- 31
- 1
- 4
2
votes
0 answers
Which reasons may cause low MHz of CPU
My system is Ubuntu 16.04.3. I installed it just now and executed some processes on it. I found that many processes used more than 100% CPUs. However, when I executed lscpu | grep MHz, I got the output as below:
CPU MHz: 423.687
CPU max MHz:…
Yves
- 3,161
- 7
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2
votes
1 answer
What is CPU min MHz in lscpu output?
There are CPU MHz, CPU max MHz and CPU min MHz in lscpu output. What are they mean? Especially the CPU min MHz? We can think CPU max MHz is maximum CPU frequency and CPU MHz as current usage. Why there is a minimum?
From lscpu man page:
Minimum…
Abhik Bose
- 2,090
- 2
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1
vote
0 answers
lscpu list different max cpu freq
Is this a bug from lscpu?
How to fix it?
~$ lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
Address sizes: 46 bits physical, 48 bits…
Mark K
- 779
- 2
- 13
- 33
1
vote
0 answers
What is the exact source of Architecture info in lscpu command
Tl;dr
I need to mock info about CPU architecture on the server for testing purpose. The only way that I can achieve it, is by changing info source about CPU architecture, that is used by lscpu command (lscpu | grep Architecture HAS to return mocked…
mindgod
- 11
- 2
1
vote
0 answers
CPU MHz don't reach CPU min MHz in lscpu
I think CPU MHZ is always more than CPU min MHz.
But, my server can't do that now.
When it looks like below, what should I check?
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): …
byulk
- 11
- 1
1
vote
0 answers
How system slots or ports are detected by linux?
how does an operating system say linux understand how many ram/pci/cpu slots/sockets are there?
Does the operating system detect this or just the info is passed from bios acpi if so please tell how even bios detects this?
Modern OSes scan the…
Zeeshan Haris
- 51
- 3
1
vote
0 answers
Is there a way to make my computers fans turn on instead of the CPU dropping frequency? I'm using Linux Mint 19.3
My computer, for whatever reason, will lower CPU usage when it gets hot instead of turning on its fan. I don't know if it's a driver issue or something else. Thanks!
The above is at 80 degrees Celcius.
T1 L.
- 11
- 1
1
vote
1 answer
how to get number of total core include thread
as all know lscpu give the info about number of CORE and number of Thread
lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 48
On-line CPU(s) list: 0-47
Thread(s)…
yael
- 12,598
- 51
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1
vote
0 answers
Linux Mint reporting wrong core numbering?
I have the latest Mint installation on an Intel Atom D2550 CPU, which is a dual core processor. When Hyper Threading is enabled in BIOS lscpu reports 4 cores (0-3), which I can also see crunching away in System Monitor.
However, when I turn Hyper…
Deemoss
- 11
- 2
1
vote
2 answers
How to calculate the number of vcores on a Linux machine
In my Linux machine I have 32 vcores.
And from lscpu, I can see same.
For my CPU, "Thread(s) per core" is 2.
So does it mean that I have actually 64 vcores?
yael
- 12,598
- 51
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0
votes
2 answers
multi-core linux workstation recognizes only 1 cpu, 1 core, 1 thread
I'm using ubuntu 20.04 on Dell Precision 7820.
$ uname -a
Linux myhost 5.4.0-56-generic #62-Ubuntu SMP Mon Nov 23 19:20:19 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Only one cpu is used/known by the OS, as can also be seen in htop.
Output of lscpu…
wsdzbm
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