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Processes.pm
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Processes.pm
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package Linode::Longview::DataGetter::Processes;
=head1 COPYRIGHT/LICENSE
Copyright 2013 Linode, LLC. Longview is made available under the terms
of the Perl Artistic License, or GPLv2 at the recipients discretion.
=head2 Perl Artistic License
Read it at L<http://dev.perl.org/licenses/artistic.html>.
=head2 GNU General Public License (GPL) Version 2
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see http://www.gnu.org/licenses/
See the full license at L<http://www.gnu.org/licenses/>.
=cut
use strict;
use warnings;
use POSIX;
use Linode::Longview::Util qw(:BASIC $TICKS);
our $DEPENDENCIES = [];
use Exporter 'import';
our @EXPORT_OK = (qw(process_info process_list));
sub process_list {
my @procs = map { s|$PROCFS||; $_ } glob "${PROCFS}[0-9]*";
return @procs;
}
sub process_info {
my $pid = shift;
my %proc;
# all or nothing, grab what we need asap
my @proc_file = slurp_file( $PROCFS . "$pid/status" ) or return;
my $stat_line = slurp_file( $PROCFS . "$pid/stat" ) or return;
my $cmd_line = slurp_file( $PROCFS . "$pid/cmdline" ) or return;
# io stats are optional depending on kernel
my @iosample = slurp_file( $PROCFS . "$pid/io" ) ;
$proc{longname} = (split("\0", $cmd_line))[0];
for my $line (@proc_file) {
if ( $line =~ m/^Name:\s+(.*)/ ) { $proc{name} = $1; next; }
if ( $line =~ m/^Pid:\s+(.*)/ ) { $proc{pid} = $1; next; }
if ( $line =~ m/^PPid:\s+(.*)/ ) { $proc{ppid} = $1; next; }
if ( $line =~ m/^Uid:\s+.*?\s+(.*?)\s/ ) { $proc{uid} = $1; next; }
if ( $line =~ m/^VmRSS:\s+(.*)\s+kB/ ) { $proc{mem} = $1; last; }
}
$proc{user} = ( getpwuid( $proc{uid} ) )[0];
# cpu
my ( $user_time, $system_time, $start_jiffies )
= ( split /\s+/, $stat_line )[ 13, 14, 21 ];
$proc{cpu} = $user_time + $system_time;
$proc{age} = proc_age($start_jiffies);
# io
for my $line (@iosample) {
if ( $line =~ m/^read_bytes:\s+(.*)/ ) { $proc{ioreadkbytes} = $1; next; }
if ( $line =~ m/^write_bytes:\s+(.*)/ ) { $proc{iowritekbytes} = $1; last; }
}
$proc{name} = $0 if $proc{pid} == $$;
return %proc;
}
sub get {
my (undef, $dataref) = @_;
$logger->trace('Collecting Process information');
my @procs = process_list();
for my $proc (@procs) {
my %info = process_info($proc);
next if ( !%info ); # no such proc, it probably died while we were gathering info
next if ( $info{ppid} == 2 );
next if ( $info{pid} == 2 );
$info{name} =~ s/\./\\\./g;
$dataref->{INSTANT}->{"Processes.${info{name}}.longname"} = $info{longname};
$dataref->{LONGTERM}->{"Processes.${info{name}}.${info{user}}.count"}++;
$dataref->{LONGTERM}->{"Processes.${info{name}}.${info{user}}.mem"} += $info{mem} + 0;
$dataref->{LONGTERM}->{"Processes.${info{name}}.${info{user}}.cpu"} += $info{cpu} if (defined $info{cpu});
$dataref->{LONGTERM}->{"Processes.${info{name}}.${info{user}}.ioreadkbytes"} += $info{ioreadkbytes} if (defined $info{ioreadkbytes});
$dataref->{LONGTERM}->{"Processes.${info{name}}.${info{user}}.iowritekbytes"} += $info{iowritekbytes} if (defined $info{iowritekbytes});
$dataref->{LONGTERM}->{"Processes.${info{name}}.${info{user}}.zz_age"} = $info{age}
if ((!defined($dataref->{LONGTERM}->{"Processes.${info{name}}.${info{user}}.zz_age"} )) ||
$info{age} > $dataref->{LONGTERM}->{"Processes.${info{name}}.${info{user}}.zz_age"} );
}
for my $key ( sort keys %{ $dataref->{LONGTERM} } ) {
next unless $key =~ /^Processes/;
if($key =~ /zz_age$/ ){
delete $dataref->{LONGTERM}->{$key};
next;
}
next if ($key =~ m/^Processes\.apt(?:-get|itude)/);
my $age_key = $key;
$age_key =~ s/[^\.]*$/zz_age/;
delete $dataref->{LONGTERM}->{$key} if ($dataref->{LONGTERM}->{$age_key} < 60);
}
return $dataref;
}
sub proc_age {
my $start_jiffies = shift;
my $uptime = ( split( /\s+/, slurp_file( $PROCFS . 'uptime' ) ) )[0];
my $current_jiffies = $uptime * $TICKS;
return ($current_jiffies - $start_jiffies) / $TICKS;
}
1;