Sys::Statistics::Linux - Collect linux system statistics. use Sys::Statistics::Linux; my $lxs = new Sys::Statistics::Linux; $lxs->set( SysInfo => 1, CpuStats => 1, ProcStats => 1, MemStats => 1, PgSwStats => 1, NetStats => 1, SockStats => 1, DiskStats => 1, DiskUsage => 1, LoadAVG => 1, FileStats => 1, Processes => 1, ); sleep 1; my $stat = $lxs->get; This module is the main package from the distribution Sys::Statistics::Linux and collects different linux system informations like processor workload, memory usage, network and disk statisitcs and other system informations. Refer to the documentation of the distribution modules to get more informations about all possible statistics and system informations. This distribution collects statistics by the virtual /proc filesystem (procfs) and is developed on default vanilla kernels. It is tested on x86 hardware with the distributions SuSE (SuSE on s390 and s390x architecture as well), Red Hat, Debian, Asianux, Slackware and Mandrake on kernel versions 2.4 and 2.6 and should run on all linux kernels with a default vanilla kernel as well. It is possible that this module doesn't run on all distributions if the procfs is too much modified. Further it is necessary to run it as a user with the authorization to read the /proc filesystem. The options "CpuStats", "ProcStats", "PgSwStats", "NetStats", "DiskStats" and "Processes" are deltas, for this reason it's necessary to initialize the statistics first, before the data be generated with "get()". The statistics can be initialized with the methods "new()", "set()" and "init()". Each option that is set to TRUE (1) will be initialized by the call of "new()" or "set()". The call of "init()" reinitialize all statistics that are set to 1. By the call of "get()" the initial statistics will be updated automatically. Please refer the METHOD section to get more information about the calls of "new()", "set()" and "get()". Another exigence is that you need to sleep for while - at least for one second - before you call "get()" if you want to get useful statistics. The options "SysInfo", "MemStats", "SockStats", "DiskUsage", "LoadAVG" and "FileStats" are no deltas. If you need only one of this informations you don't need to sleep before the call of "get()". The "get()" function collects all requested informations and returns a hash reference with the statistics. The inital statistics will be updated. You can turn on and off options with "set()". All options are identical with the package names of the distribution. To activate the gathering of statistics you have to set the options by the call of "new()" or "set()". In addition you can deactivate - respectively delete - statistics with "set()" and re-init all statistics with "init()". The options must be set with a BOOLEAN value (1|0). 1 - activate (initialize) 0 - deactivate (delete) To get more informations about each option refer the different modules of the distribution. SysInfo - Collect system informations with L<Sys::Statistics::Linux::SysInfo>. CpuStats - Collect cpu statistics with L<Sys::Statistics::Linux::CpuStats>. ProcStats - Collect process statistics with L<Sys::Statistics::Linux::ProcStats>. MemStats - Collect memory statistics with L<Sys::Statistics::Linux::MemStats>. PgSwStats - Collect paging and swapping statistics with L<Sys::Statistics::Linux::PgSwStats>. NetStats - Collect net statistics with L<Sys::Statistics::Linux::NetStats>. SockStats - Collect socket statistics with L<Sys::Statistics::Linux::SockStats>. DiskStats - Collect disk statistics with L<Sys::Statistics::Linux::DiskStats>. DiskUsage - Collect the disk usage with L<Sys::Statistics::Linux::DiskUsage>. LoadAVG - Collect the load average with L<Sys::Statistics::Linux::LoadAVG>. FileStats - Collect inode statistics with L<Sys::Statistics::Linux::FileStats>. Processes - Collect process statistics with L<Sys::Statistics::Linux::Processes>.

new()
Call "new()" to create a new Statistic object. Necessary statistics will be initialized. Without options my $lxs = new Sys::Statistics::Linux; Or with options my $lxs = Sys::Statistics::Linux->new(CpuStats => 1); Will do nothing my $lxs = Sys::Statistics::Linux->new(CpuStats => 0); It's possible to call "new()" with a hash reference of options. my %options = ( CpuStats => 1, MemStats => 1 ); my $lxs = Sys::Statistics::Linux->new(\%options);

set()
Call "set()" to activate (initialize) or deactivate (delete) options. $lxs->set( CpuStats => 1, # activate SysInfo => 0, # deactivate ); It's possible to call "set()" with a hash reference of options. my %options = ( CpuStats => 1, MemStats => 1 ); $lxs->set(\%options); Activate options with "set()" will initialize necessary statistics. $lxs->set(CpuStats => 1); # initialize it $lxs->set(CpuStats => 1); # initialize it again

get()
Call "get()" to get the collected statistics. "get()" returns the statistics as a hash reference. my $stats = $lxs->get;

init()
The call of "init()" re-init all statistics that are necessary for deltas and if the option is set to 1. $lxs->init;

settime()
Call "settime()" to define a POSIX formatted time stamp, generated with localtime(). $lxs->settime('%Y/%m/%d %H:%M:%S'); To get more informations about the formats take a look at "strftime()" of POSIX.pm or the manpage strftime(3).

gettime()
"gettime()" returns a POSIX formatted time stamp, @foo in list and $bar in scalar context. If the time format isn't set then the default format "%Y-%m-%d %H:%M:%S" will be set automatically. You can also set a time format with "gettime()". my $date_time = $lxs->gettime; Or my ($date, $time) = $lxs->gettime; Or my ($date, $time) = $lxs->gettime('%Y/%m/%d %H:%M:%S'); A very simple perl script could looks like this: use warnings; use strict; use Sys::Statistics::Linux; my $lxs = Sys::Statistics::Linux->new( CpuStats => 1 ); sleep(1); my $stats = $lxs->get; my $cpu = $stats->{CpuStats}->{cpu}; print "Statistics for CpuStats (all)\n"; print " user $cpu->{user}\n"; print " nice $cpu->{nice}\n"; print " system $cpu->{system}\n"; print " idle $cpu->{idle}\n"; print " ioWait $cpu->{iowait}\n"; print " total $cpu->{total}\n"; Example to collect network statistics with a nice output: use warnings; use strict; use Sys::Statistics::Linux; $| = 1; my $header = 20; my $average = 1; my $columns = 8; my $options = { NetStats => 1 }; my @order = qw( rxbyt rxpcks rxerrs rxdrop rxfifo rxframe rxcompr rxmulti txbyt txpcks txerrs txdrop txfifo txcolls txcarr txcompr ); my $lxs = Sys::Statistics::Linux->new( $options ); my $h = $header; while (1) { sleep($average); my $stats = $lxs->get; if ($h == $header) { printf "%${columns}s", $_ for ('iface', @order); print "\n"; } foreach my $device (keys %{$stats->{NetStats}}) { my $dstat = $stats->{NetStats}->{$device}; printf "%${columns}s", $device; printf "%${columns}s", $dstat->{$_} for @order; print "\n"; } $h = $header if --$h == 0; } Activate and deactivate statistics: use warnings; use strict; use Sys::Statistics::Linux; use Data::Dumper; my $lxs = new Sys::Statistics::Linux; # set the options $lxs->set( SysInfo => 1, CpuStats => 1, MemStats => 1 ); # sleep to get useful statistics for CpuStats sleep(1); # $stats contains SysInfo, CpuStats and MemStats my $stats = $lxs->get; print Dumper($stats); # we deactivate CpuStats $lxs->set(CpuStats => 0); # $stats contains SysInfo and MemStats $stats = $lxs->get; print Dumper($stats); Set and get a time stamp: use warnings; use strict; use Sys::Statistics::Linux; my $lxs = new Sys::Statistics::Linux; $lxs->settime('%Y/%m/%d %H:%M:%S'); print $lxs->gettime, "\n"; If you're not sure you can use the the "Data::Dumper" module to learn more about the hash structure: use warnings; use strict; use Sys::Statistics::Linux; use Data::Dumper; my $lxs = Sys::Statistics::Linux->new( CpuStats => 1 ); sleep(1); my $stats = $lxs->get; print Dumper($stats); Take a look into the the examples directory of the distribution for some examples with a nice output. :-) No exports. Please report all bugs to <jschulz.cpan(at)bloonix.de>. Jonny Schulz <jschulz.cpan(at)bloonix.de>. 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.