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contrib-munin/plugins/system/lpar_cpu
2012-02-13 18:24:46 +01:00

98 lines
1.8 KiB
Perl
Executable File

#!/usr/bin/perl -w
#
# Plugin to monitor physical cpu usage in an IBM POWER P5 / OpenPower LPAR
#
# Usage: Place in /etc/munin/plugins (or make a symlink to it there)
#
# Parameters understood:
#
# config
# autoconf
#
# This should be run as root, so drop a file with something like this in
# /etc/munin/plugin-conf.d/lpar_cpu:
# [lpar_cpu]
# user root
#
# Great thanks to Nigel Griffith of IBM for the magic to get these values
#
# Author: Ingvar Hagelund <ingvar(at)linpro.no>
#
# Licence: GNU General Public Licence v2.0,
# see http://www.gnu.org/copyleft/gpl.html
use strict;
my $stats="/proc/ppc64/lparcfg";
my $cpuinfo="/proc/cpuinfo";
my $seconds=2;
my $counter="";
my $after="";
my $timebase="";
sub readstats {
my $stats=shift;
my $purr;
open (STATS,"$stats") or die "Unable to read $stats, $!";
while (<STATS>) {
if ( /^purr\=(\d+)$/ ) { $purr = $1; }
}
close STATS;
return $purr;
}
sub error {
print "something horrible happened\n";
exit 2;
}
################
#
# Main
#
#
if ( defined $ARGV[0] ) {
if ( $ARGV[0] eq 'autoconf' ) {
if ( -e $stats && -e $cpuinfo ) {
print "yes\n";
exit 0;
}
else {
print "no\n";
exit 1;
}
}
elsif ( $ARGV[0] eq 'config' ) {
print "graph_title LPAR physical CPU usage\n";
print "graph_args --base 1000\n";
print "graph_vlabel percent\n";
print "graph_category system\n";
print "cpu.label cpu\n";
print "cpu.type DERIVE\n";
print "cpu.min 0\n";
exit 0;
}
}
$counter=readstats($stats);
open (CPUINFO,$cpuinfo) or die "Unable to read $cpuinfo, $!";
while (<CPUINFO>) {
if (/^timebase\s+\:\s+(\d+)/) { $timebase=$1; }
}
close CPUINFO;
error() if $cpuinfo eq "";
error() if $counter eq "";
error() if $timebase eq "";
my $val=100*$counter/$timebase;
$val =~ s/(\d+)\..+/$1/;
print "cpu.value " . $val . "\n";
exit 0;