Shell Script Number Of CPUS

Updated: 24-Nov-2004
Version: 1.0

Description

A UNIX platform independent script which displays the number of CPUS on a server

Parameters

SQL Source

REM Copyright (C) Think Forward.com 1998- 2005. All rights reserved. 

#!/bin/sh

#
# ncpu - display the number of active/enabled/online CPUs
#

PATH=$PATH:/usr/sbin # for psrinfo, sysctl

uname=`uname`

case "$uname" in
AIX)
	lsdev -C -c processor -S Available|grep -c . # wc -l formats funny
	;;
*BSD|*bsd|Darwin)
	sysctl -n hw.ncpu
	;;
HP-UX)	# does this work for non-root users?
	ioscan -fnkC processor|grep -c '^processor'
	;;
IRIX*) # IRIX, IRIX64
	hinv -c processor|head -1|awk '{print $1}'
	;;
Linux)
	if test -f /proc/cpuinfo; then
		grep -c '^processor' /proc/cpuinfo
	else
		echo "$0: no /proc/cpuinfo" 2>&1
		exit 1
	fi
	;;
OSF1|SunOS)
	psrinfo|grep -c on-line
	;;
*)
	echo "$0: unknown uname '$uname'" 2>&1
	exit 1
	;;
esac

exit 0

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