linux-kernel - Re: Question on /proc/cpuinfo

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Date:	Fri, 14 Sep 2012 20:30:15 +0800
From:	Cong Wang <xiyou.wangcong@...il.com>
To:	JA Magallón <jamagallonn@...il.com>
CC:	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: Question on /proc/cpuinfo

On 09/14/2012 07:18 AM, JA Magallón wrote:
> Hi...
>
> Probably it is a stupid question, but... I wan to count the number of
> processors, cores and threads on a linux system. I do it by reading
> /proc/cpuinfo.
>
...
>
> Since when is it safe to read things the modern way (kernel version ?).
> Is there a better procedure to get this info ?
>

Probably lscpu(1) is better for you, on my laptop it outputs:

% lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                2
On-line CPU(s) list:   0,1
Thread(s) per core:    1
Core(s) per socket:    2
Socket(s):             1
NUMA node(s):          1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 23
Stepping:              10
CPU MHz:               2401.000
BogoMIPS:              4788.03
Virtualization:        VT-x
L1d cache:             32K
L1i cache:             32K
L2 cache:              3072K
NUMA node0 CPU(s):     0,1

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