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Operating Systems Linux Red Hat finding no of core in processor Post 302267498 by otheus on Friday 12th of December 2008 01:30:36 PM
Old 12-12-2008
No command per se. As Jimbalaya said, you can inspect /proc/cpuinfo to see if it reports the number of cores. In fact, the format is separated into sections -- each describing a CPU (a core counts as a CPU; there may be many CPUs per "chip"). So you want to count the sections to find how many cores there are.

Therefore the command that will work best is:
Code:
grep -ic ^processor /proc/cpuinfo

 

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Sys::Statistics::Linux::SysInfo(3pm)			User Contributed Perl Documentation		      Sys::Statistics::Linux::SysInfo(3pm)

NAME
Sys::Statistics::Linux::SysInfo - Collect linux system information. SYNOPSIS
use Sys::Statistics::Linux::SysInfo; my $lxs = Sys::Statistics::Linux::SysInfo->new; my $info = $lxs->get; DESCRIPTION
Sys::Statistics::Linux::SysInfo gathers system information from the virtual /proc filesystem (procfs). For more information read the documentation of the front-end module Sys::Statistics::Linux. SYSTEM INFOMATIONS
Generated by /proc/sys/kernel/{hostname,domainname,ostype,osrelease,version} and /proc/cpuinfo, /proc/meminfo, /proc/uptime, /proc/net/dev. hostname - The host name. domain - The host domain name. kernel - The kernel name. release - The kernel release. version - The kernel version. memtotal - The total size of memory. swaptotal - The total size of swap space. uptime - The uptime of the system. idletime - The idle time of the system. pcpucount - The total number of physical CPUs. tcpucount - The total number of CPUs (cores, hyper threading). interfaces - The interfaces of the system. arch - The machine hardware name (uname -m). # countcpus is the same like tcpucount countcpus - The total (maybe logical) number of CPUs. "pcpucount" and "tcpucount" are really easy to understand. Both values are collected from "/proc/cpuinfo". "pcpucount" is the number of physical CPUs, counted by "physical id". "tcpucount" is just the total number counted by "processor". If you want to get "uptime" and "idletime" as raw value you can set $Sys::Statistics::Linux::SysInfo::RAWTIME = 1; # or with Sys::Statistics::Linux::SysInfo->new(rawtime => 1) METHODS
new() Call "new()" to create a new object. my $lxs = Sys::Statistics::Linux::SysInfo->new; get() Call "get()" to get the statistics. "get()" returns the statistics as a hash reference. my $info = $lxs->get; EXPORTS
No exports. SEE ALSO
proc(5) REPORTING BUGS
Please report all bugs to <jschulz.cpan(at)bloonix.de>. AUTHOR
Jonny Schulz <jschulz.cpan(at)bloonix.de>. COPYRIGHT
Copyright (c) 2006, 2007 by Jonny Schulz. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.14.2 2012-03-09 Sys::Statistics::Linux::SysInfo(3pm)
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