Comments on: How to Check Processor and CPU Details on Linux – Command Examples

By: mmu_man

mmu_man — Wed, 17 Aug 2016 22:36:12 +0000

nproc is not so cross-platform as it is GNU-specific though. It’s still better than grepping /proc/cpuinfo, but if you really want something that works everywhere except maybe on windows (actually… oh yes, Cygwin has it too), use getconf.

cf. https://gist.github.com/jj1bdx/5746298
or just a oneliner:
cpus=$(getconf NPROCESSORS_ONLN 2>/dev/null || getconf _NPROCESSORS_ONLN 2>/dev/null || echo 1)

(*_CONF will count all cpus while *_ONLN counts only online CPUs)

By: Richard Prior

Richard Prior — Mon, 11 Jul 2016 01:20:32 +0000

In reply to radek.

I was struggling to get the graphical hardware utility on Kubuntu 14.04 to run until I read the comments:

No Response with hwloc as per the instructions, however lstopo and hwloc-ls worked fine. Thanks for sharing the information.

Rich

By: reli

reli — Fri, 19 Feb 2016 17:52:39 +0000

If you are looking for physical CPU count /proc/cpuinfo is confusing . It gives the number of threads .

To get physical CPU count .

[root@xxx~]# dmidecode -t 4 | egrep -i “Designation|Intel|core|thread”
Socket Designation: CPU1
Manufacturer: Intel
HTT (Multi-threading)
Version: Intel(R) Xeon(R) CPU L5640 @ 2.27GHz
Core Count: 6
Core Enabled: 6
Thread Count: 12
Socket Designation: CPU2
Manufacturer: Intel
HTT (Multi-threading)
Version: Intel(R) Xeon(R) CPU L5640 @ 2.27GHz
Core Count: 6
Core Enabled: 6
Thread Count: 12

The same server if i give

[root@xxxx ~]# cat /proc/cpuinfo | egrep processor | wc -l
24

So its means i have a 24 threads system , so dont rely on cpuinfo .

-R

By: radek

radek — Fri, 25 Dec 2015 20:48:00 +0000

In reply to Stephen. or hwloc-ls

By: radek

radek — Fri, 25 Dec 2015 20:46:00 +0000

In reply to Stephen. or lstopo-ls

By: Torsten Rusch

Torsten Rusch — Wed, 24 Jun 2015 23:08:00 +0000

Useless use of cat.

cat /proc/cpuinfo | grep processor

Better do:

grep processor /proc/cpuinfo

By: Stephen

Stephen — Tue, 09 Dec 2014 02:34:00 +0000

In the last example you have hwloc as the command to run. You meant to have $ lstopo.

$ sudo apt-get install hwloc
$ hwloc

By: Pádraig Brady

Pádraig Brady — Sun, 13 Jul 2014 13:15:00 +0000

Note a user space util designed to be used from shell scripts etc. available on most systems through GNU coreutils is nproc. This returns the number of _available_ processors in a cross platform way. For example:

make -j $(nproc)

By: Miquel Mayol i Tur

Miquel Mayol i Tur — Wed, 09 Jul 2014 14:24:00 +0000

No bogomips? it is the first thing I do read to compare CPUs

By: Virneto

Virneto — Fri, 04 Jul 2014 10:54:23 +0000

Very nice and usefull commands collection!!
Pretty awesome!!

Cheers to you!