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parallel/src/niceload
Ole Tange 9bb46c6ed6 Released as 20140722 ('MH17').
2014-07-22 06:47:30 +02:00

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#!/usr/bin/perl -w
# Copyright (C) 2004,2005,2006,2006,2008,2009,2010 Ole Tange,
# http://ole.tange.dk
#
# Copyright (C) 2010,2011 Ole Tange, http://ole.tange.dk and Free
# Software Foundation, Inc.
#
# 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 3 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/>
# or write to the Free Software Foundation, Inc., 51 Franklin St,
# Fifth Floor, Boston, MA 02110-1301 USA
use strict;
use Getopt::Long;
$Global::progname="niceload";
$Global::version = 20140722;
Getopt::Long::Configure("bundling","require_order");
get_options_from_array(\@ARGV) || die_usage();
if($opt::version) {
version();
exit 0;
}
if($opt::help) {
help();
exit 0;
}
if($opt::factor and $opt::suspend) {
# You cannot have --suspend and --factor
help();
exit;
}
if(not (defined $opt::start_io or defined $opt::run_io
or defined $opt::start_load or defined $opt::run_load
or defined $opt::start_mem or defined $opt::run_mem
or defined $opt::start_noswap or defined $opt::run_noswap
or defined $opt::io or defined $opt::load
or defined $opt::mem or defined $opt::noswap)) {
# Default is --runload=1
$opt::run_load = 1;
}
if(not defined $opt::start_io) { $opt::start_io = $opt::io; }
if(not defined $opt::run_io) { $opt::run_io = $opt::io; }
if(not defined $opt::start_load) { $opt::start_load = $opt::load; }
if(not defined $opt::run_load) { $opt::run_load = $opt::load; }
if(not defined $opt::start_mem) { $opt::start_mem = $opt::mem; }
if(not defined $opt::run_mem) { $opt::run_mem = $opt::mem; }
if(not defined $opt::start_noswap) { $opt::start_noswap = $opt::noswap; }
if(not defined $opt::run_noswap) { $opt::run_noswap = $opt::noswap; }
if(defined $opt::load) { multiply_binary_prefix($opt::load); }
my $limit = Limit->new();
my $process = Process->new($opt::nice,@ARGV);
$::exitstatus = 0;
if(@opt::prg) {
# Find all pids of prg
my $out = `pidof -x @opt::prg`;
$process->set_pid(split /\s+/,$out);
$::resume_process = $process;
$SIG{TERM} = $SIG{INT} = \&resume;
} elsif(@opt::pid) {
$process->set_pid(@opt::pid);
$::resume_process = $process;
$SIG{TERM} = $SIG{INT} = \&resume;
} elsif (@ARGV) {
# Wait until limit is below start_limit and run_limit
while($limit->over_start_limit()
or
($limit->hard() and $limit->over_run_limit())) {
$limit->sleep_for_recheck();
}
$process->start();
}
while($process->is_alive()) {
if($limit->over_run_limit()) {
$process->suspend();
$limit->sleep_for_recheck();
if(not $limit->hard()) {
$process->resume();
$limit->sleep_while_running();
}
} else {
$process->resume();
$limit->sleep_while_running();
}
}
exit($::exitstatus);
sub resume {
$::resume_process->resume();
exit(0);
}
sub uniq {
# Remove duplicates and return unique values
return keys %{{ map { $_ => 1 } @_ }};
}
sub multiply_binary_prefix {
# Evalualte numbers with binary prefix
# k=10^3, m=10^6, g=10^9, t=10^12, p=10^15, e=10^18, z=10^21, y=10^24
# K=2^10, M=2^20, G=2^30, T=2^40, P=2^50, E=2^70, Z=2^80, Y=2^80
# Ki=2^10, Mi=2^20, Gi=2^30, Ti=2^40, Pi=2^50, Ei=2^70, Zi=2^80, Yi=2^80
# ki=2^10, mi=2^20, gi=2^30, ti=2^40, pi=2^50, ei=2^70, zi=2^80, yi=2^80
# 13G = 13*1024*1024*1024 = 13958643712
my $s = shift;
$s =~ s/k/*1000/g;
$s =~ s/M/*1000*1000/g;
$s =~ s/G/*1000*1000*1000/g;
$s =~ s/T/*1000*1000*1000*1000/g;
$s =~ s/P/*1000*1000*1000*1000*1000/g;
$s =~ s/E/*1000*1000*1000*1000*1000*1000/g;
$s =~ s/Z/*1000*1000*1000*1000*1000*1000*1000/g;
$s =~ s/Y/*1000*1000*1000*1000*1000*1000*1000*1000/g;
$s =~ s/X/*1000*1000*1000*1000*1000*1000*1000*1000*1000/g;
$s =~ s/Ki?/*1024/gi;
$s =~ s/Mi?/*1024*1024/gi;
$s =~ s/Gi?/*1024*1024*1024/gi;
$s =~ s/Ti?/*1024*1024*1024*1024/gi;
$s =~ s/Pi?/*1024*1024*1024*1024*1024/gi;
$s =~ s/Ei?/*1024*1024*1024*1024*1024*1024/gi;
$s =~ s/Zi?/*1024*1024*1024*1024*1024*1024*1024/gi;
$s =~ s/Yi?/*1024*1024*1024*1024*1024*1024*1024*1024/gi;
$s =~ s/Xi?/*1024*1024*1024*1024*1024*1024*1024*1024*1024/gi;
$s = eval $s;
return $s;
}
sub get_options_from_array {
# Run GetOptions on @array
# Returns:
# true if parsing worked
# false if parsing failed
# @array is changed
my $array_ref = shift;
# A bit of shuffling of @ARGV needed as GetOptionsFromArray is not
# supported everywhere
my @save_argv;
my $this_is_ARGV = (\@::ARGV == $array_ref);
if(not $this_is_ARGV) {
@save_argv = @::ARGV;
@::ARGV = @{$array_ref};
}
my @retval = GetOptions
("debug|D" => \$opt::debug,
"factor|f=s" => \$opt::factor,
"hard|H" => \$opt::hard,
"soft|S" => \$opt::soft,
"sensor=s" => \$opt::sensor,
"si|sio|startio|start-io=s" => \$opt::start_io,
"ri|rio|runio|run-io=s" => \$opt::run_io,
"io|I=s" => \$opt::io,
"sl|startload|start-load=s" => \$opt::start_load,
"rl|runload|run-load=s" => \$opt::run_load,
"load|L|l=s" => \$opt::load,
"sm|startmem|start-mem=s" => \$opt::start_mem,
"rm|runmem|run-mem=s" => \$opt::run_mem,
"mem|M=s" => \$opt::mem,
"sn|startnoswap|start-noswap|start-no-swap" => \$opt::start_noswap,
"rn|runnoswap|run-noswap|run-no-swap" => \$opt::run_noswap,
"noswap|N" => \$opt::noswap,
"nice|n=i" => \$opt::nice,
"program|prg=s" => \@opt::prg,
"process|pid|p=s" => \@opt::pid,
"suspend|s=s" => \$opt::suspend,
"recheck|t=s" => \$opt::recheck,
"quote|q" => \$opt::quote,
"help|h" => \$opt::help,
"verbose|v" => \$opt::verbose,
"version|V" => \$opt::version,
);
if(not $this_is_ARGV) {
@{$array_ref} = @::ARGV;
@::ARGV = @save_argv;
}
return @retval;
}
sub die_usage {
help();
exit 1;
}
sub help {
print q{
Usage:
niceload [-v] [-n niceness] [-L loadavg] [-I io] [-N] [-M mem]
[-s suspend_sec|-f factor] [-H] [-S]
command or -p pid
};
}
sub die_bug {
my $bugid = shift;
print STDERR
("$Global::progname: This should not happen. You have found a bug.\n",
"Please contact <parallel\@gnu.org> and include:\n",
"* The version number: $Global::version\n",
"* The bugid: $bugid\n",
"* The command line being run\n",
"* The files being read (put the files on a webserver if they are big)\n",
"\n",
"If you get the error on smaller/fewer files, please include those instead.\n");
exit(255);
}
sub usleep {
# Sleep this many milliseconds.
my $secs = shift;
::debug("Sleeping ",$secs," millisecs\n");
select(undef, undef, undef, $secs/1000);
}
sub debug {
if($opt::debug) {
print STDERR @_;
}
}
sub my_dump {
# Returns:
# ascii expression of object if Data::Dump(er) is installed
# error code otherwise
my @dump_this = (@_);
eval "use Data::Dump qw(dump);";
if ($@) {
# Data::Dump not installed
eval "use Data::Dumper;";
if ($@) {
my $err = "Neither Data::Dump nor Data::Dumper is installed\n".
"Not dumping output\n";
print STDERR $err;
return $err;
} else {
return Dumper(@dump_this);
}
} else {
eval "use Data::Dump qw(dump);";
return (Data::Dump::dump(@dump_this));
}
}
sub version {
# Returns: N/A
print join("\n",
"GNU $Global::progname $Global::version",
"Copyright (C) 2004,2005,2006,2007,2008,2009 Ole Tange",
"Copyright (C) 2010,2011 Ole Tange and Free Software Foundation, Inc.",
"License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>",
"This is free software: you are free to change and redistribute it.",
"GNU $Global::progname comes with no warranty.",
"",
"Web site: http://www.gnu.org/software/parallel\n"
);
}
sub max {
# Returns:
# Maximum value of array
my $max;
for (@_) {
# Skip undefs
defined $_ or next;
defined $max or do { $max = $_; next; }; # Set $_ to the first non-undef
$max = ($max > $_) ? $max : $_;
}
return $max;
}
sub min {
# Returns:
# Minimum value of array
my $min;
for (@_) {
# Skip undefs
defined $_ or next;
defined $min or do { $min = $_; next; }; # Set $_ to the first non-undef
$min = ($min < $_) ? $min : $_;
}
return $min;
}
package Process;
sub new {
my $class = shift;
my $nice = shift;
my @ARGV = @_;
if($nice) {
unshift(@ARGV, "nice", "-n", $nice);
}
return bless {
'running' => 0, # Is the process running now?
'command' => [@ARGV],
}, ref($class) || $class;
}
sub pgrp {
my $self = shift;
my @pgrp;
if(not $self->{'pgrp'}) {
for(@{$self->{'pids'}}) {
push @pgrp,-getpgrp($_);
}
@pgrp = ::uniq(@pgrp);
@{$self->{'pgrp'}} = @pgrp;
}
return @{$self->{'pgrp'}};
}
sub set_pid {
my $self = shift;
push(@{$self->{'pids'}},@_);
$self->{'running'} = 1;
$::exitstatus = 0;
}
sub start {
# Start the program
my $self = shift;
::debug("Starting @{$self->{'command'}}\n");
$self->{'running'} = 1;
if($self->{'pid'} = fork) {
# set signal handler to kill children if parent is killed
push @{$self->{'pids'}}, $self->{'pid'};
$Global::process = $self;
$SIG{CHLD} = \&REAPER;
$SIG{INT}=\&kill_child_INT;
$SIG{TSTP}=\&kill_child_TSTP;
$SIG{CONT}=\&kill_child_CONT;
sleep 1; # Give child time to setpgrp(0,0);
} else {
setpgrp(0,0);
::debug("Child pid: $$, pgrp: ",getpgrp $$,"\n");
::debug("@{$self->{'command'}}\n");
if($opt::quote) {
system(@{$self->{'command'}});
} else {
system("@{$self->{'command'}}");
}
$::exitstatus = $? >> 8;
$::exitsignal = $? & 127;
::debug("Child exit $::exitstatus\n");
exit($::exitstatus);
}
}
use POSIX ":sys_wait_h";
use POSIX qw(:sys_wait_h);
sub REAPER {
my $stiff;
while (($stiff = waitpid(-1, &WNOHANG)) > 0) {
# do something with $stiff if you want
$::exitstatus = $? >> 8;
$::exitsignal = $? & 127;
}
$SIG{CHLD} = \&REAPER; # install *after* calling waitpid
}
sub kill_child_CONT {
my $self = $Global::process;
::debug("SIGCONT received. Killing @{$self->{'pgrp'}}\n");
kill CONT => $self->pgrp();
}
sub kill_child_TSTP {
my $self = $Global::process;
::debug("SIGTSTP received. Killing $self->{'pid'} and self ($$)\n");
kill TSTP => $self->pgrp();
kill STOP => -$$;
kill STOP => $$;
}
sub kill_child_INT {
my $self = $Global::process;
::debug("SIGINT received.\n");
if(not @opt::pid) {
::debug("Killing $self->{'pid'} Exit\n");
kill INT => $self->pgrp();
} else {
::debug("Continue pids $self->{'pid'} Exit\n");
kill CONT => $self->pgrp();
}
exit;
}
sub resume {
my $self = shift;
::debug("Resume @{$self->{'pids'}}\n");
if(not $self->{'running'}) {
# - = PID group
map { kill "CONT", -$_ } @{$self->{'pids'}};
# If using -p it is not in a group
map { kill "CONT", $_ } @{$self->{'pids'}};
$self->{'running'} = 1;
}
}
sub suspend {
my $self = shift;
::debug("Suspend @{$self->{'pids'}}\n");
if($self->{'running'}) {
# - = PID group
map { kill "STOP", -$_ } @{$self->{'pids'}};
# If using -p it is not in a group
map { kill "STOP", $_ } @{$self->{'pids'}};
$self->{'running'} = 0;
}
}
sub is_alive {
# The process is dead if none of the pids exist
my $self = shift;
my ($exists) = 0;
for my $pid (@{$self->{'pids'}}) {
if(kill 0 => $pid) { $exists++ }
}
::debug("is_alive: $exists\n");
return $exists;
}
package Limit;
sub new {
my $class = shift;
my %limits = @_;
my $hard = $opt::soft ? 0 : $opt::hard;
my $runio = $opt::run_io ? ::multiply_binary_prefix($opt::run_io) : 0;
my $startio = $opt::start_io ? ::multiply_binary_prefix($opt::start_io) : 0;
my $runload = $opt::run_load ? ::multiply_binary_prefix($opt::run_load) : 0;
my $startload = $opt::start_load ? ::multiply_binary_prefix($opt::start_load) : 0;
my $runmem = $opt::run_mem ? ::multiply_binary_prefix($opt::run_mem) : 0;
my $startmem = $opt::start_mem ? ::multiply_binary_prefix($opt::start_mem) : 0;
my $runnoswap = $opt::run_noswap ? ::multiply_binary_prefix($opt::run_noswap) : 0;
my $startnoswap = $opt::start_noswap ? ::multiply_binary_prefix($opt::start_noswap) : 0;
my $recheck = $opt::recheck ? ::multiply_binary_prefix($opt::recheck) : 1; # Default
my $runtime = $opt::suspend ? ::multiply_binary_prefix($opt::suspend) : 1; # Default
return bless {
'hard' => $hard,
'recheck' => $recheck,
'runio' => $runio,
'startio' => $startio,
'runload' => $runload,
'startload' => $startload,
'runmem' => $runmem,
'startmem' => $startmem,
'runnoswap' => $runnoswap,
'startnoswap' => $startnoswap,
'factor' => $opt::factor || 1,
'recheck' => $recheck,
'runtime' => $runtime,
'over_run_limit' => 1,
'over_start_limit' => 1,
'verbose' => $opt::verbose,
}, ref($class) || $class;
}
sub over_run_limit {
my $self = shift;
my $status = 0;
if($self->{'runmem'}) {
# mem should be between 0-10ish
# 100% available => 0 (1-1)
# 50% available => 1 (2-1)
# 10% available => 9 (10-1)
my $mem = $self->mem_status();
::debug("Run memory: $self->{'runmem'}/$mem\n");
$status += (::max(1,$self->{'runmem'}/$mem)-1);
}
if($self->{'runload'}) {
# If used with other limits load should be between 0-10ish
no warnings 'numeric';
my $load = $self->load_status();
if($self->{'runload'} > 0) {
# Stop if the load is above the limit
$status += ::max(0,$load - $self->{'runload'});
} else {
# Stop if the load is below the limit (for sensor)
$status += ::max(0,-$load - $self->{'runload'});
}
}
if($self->{'runnoswap'}) {
# swap should be between 0-10ish
# swap in or swap out or no swap = 0
# else log(swapin*swapout)
my $swap = $self->swap_status();
$status += log(::max(1, $swap - $self->{'runnoswap'}));
}
if($self->{'runio'}) {
my $io = $self->io_status();
$status += ::max(0,$io - $self->{'runio'});
}
$self->{'over_run_limit'} = $status;
if(not $opt::recheck) {
$self->{'recheck'} = $self->{'factor'} * $self->{'over_run_limit'};
}
::debug("over_run_limit: $status\n");
return $self->{'over_run_limit'};
}
sub over_start_limit {
my $self = shift;
my $status = 0;
if($self->{'startmem'}) {
# mem should be between 0-10ish
# 100% available => 0 (1-1)
# 50% available => 1 (2-1)
# 10% available => 9 (10-1)
my $mem = $self->mem_status();
::debug("Start memory: $self->{'startmem'}/$mem\n");
$status += (::max(1,$self->{'startmem'}/$mem)-1);
}
if($self->{'startload'}) {
# load should be between 0-10ish
# 0 load => 0
no warnings 'numeric';
my $load = $self->load_status();
if($self->{'startload'} > 0) {
# Stop if the load is above the limit
$status += ::max(0,$load - $self->{'startload'});
} else {
# Stop if the load is below the limit (for sensor)
$status += ::max(0,-$load - $self->{'startload'});
}
}
if($self->{'startnoswap'}) {
# swap should be between 0-10ish
# swap in or swap out or no swap = 0
# else log(swapin*swapout)
my $swap = $self->swap_status();
$status += log(::max(1, $swap - $self->{'startnoswap'}));
}
if($self->{'startio'}) {
my $io = $self->io_status();
$status += ::max(0,$io - $self->{'startio'});
}
$self->{'over_start_limit'} = $status;
if(not $opt::recheck) {
$self->{'recheck'} = $self->{'factor'} * $self->{'over_start_limit'};
}
::debug("over_start_limit: $status\n");
return $self->{'over_start_limit'};
}
sub hard {
my $self = shift;
return $self->{'hard'};
}
sub verbose {
my $self = shift;
return $self->{'verbose'};
}
sub sleep_for_recheck {
my $self = shift;
if($self->{'recheck'} < 0.5) {
# Never sleep less than 0.5 sec
$self->{'recheck'} = 0.5;
}
if($self->verbose()) {
$self->{'recheck'} = int($self->{'recheck'}*100)/100;
print STDERR "Sleeping $self->{'recheck'}s\n";
}
::debug("recheck in $self->{'recheck'}s\n");
::usleep(1); # For some reason this gets interrupted
::usleep(1000*$self->{'recheck'});
}
sub sleep_while_running {
my $self = shift;
::debug("check in $self->{'runtime'}s\n");
if($self->verbose()) {
$self->{'runtime'} = int($self->{'runtime'}*100)/100;
print STDERR "Running $self->{'runtime'}s\n";
}
::usleep(1); # For some reason this gets interrupted
::usleep(1000*$self->{'runtime'});
}
sub nonblockGetLines {
# An non-blocking filehandle read that returns an array of lines read
# Returns: ($eof,@lines)
# Example: --sensor 'vmstat 1 | perl -ane '\''$|=1; 4..0 and print $F[8],"\n"'\'
my ($fh,$timeout) = @_;
$timeout = 0 unless defined $timeout;
my $rfd = '';
$::nonblockGetLines_last{$fh} = ''
unless defined $::nonblockGetLines_last{$fh};
vec($rfd,fileno($fh),1) = 1;
return unless select($rfd, undef, undef, $timeout)>=0;
# I'm not sure the following is necessary?
return unless vec($rfd,fileno($fh),1);
my $buf = '';
my $n = sysread($fh,$buf,1024*1024);
my $eof = eof($fh);
# If we're done, make sure to send the last unfinished line
return ($eof,$::nonblockGetLines_last{$fh}) unless $n;
# Prepend the last unfinished line
$buf = $::nonblockGetLines_last{$fh}.$buf;
# And save any newly unfinished lines
$::nonblockGetLines_last{$fh} =
(substr($buf,-1) !~ /[\r\n]/ && $buf =~ s/([^\r\n]*)$//)
? $1 : '';
$buf ? ($eof,split(/\n/,$buf)) : ($eof);
}
sub read_sensor {
my $self = shift;
::debug("read_sensor");
my $fh = $self->{'sensor_fh'};
if(not $fh) {
# Start the sensor
open($fh, "-|", $opt::sensor) || ::die_bug("Cannot open: $opt::sensor");
$self->{'sensor_fh'} = $fh;
}
# Read as much as we can (non_block)
my ($eof,@lines) = nonblockGetLines($fh);
# new load = last full line
foreach my $line (@lines) {
if(defined $line) {
::debug("Pipe saw: $eof [$line]\n");
$Global::last_sensor_reading = $line;
}
}
if($eof) {
# End of file => Restart the sensor
close $fh;
open($fh, "-|", $opt::sensor) || ::die_bug("Cannot open: $opt::sensor");
$self->{'sensor_fh'} = $fh;
}
return $Global::last_sensor_reading;
}
sub load_status {
# Returns:
# loadavg or sensor measurement
my $self = shift;
if($opt::sensor) {
if(not defined $self->{'load_status'} or
$self->{'load_status_cache_time'} + $self->{'recheck'} < time) {
$self->{'load_status'} = $self->read_sensor();
while (not defined $self->{'load_status'}) {
sleep 1;
$self->{'load_status'} = $self->read_sensor();
}
$self->{'load_status_cache_time'} = time - 0.001;
}
} else {
# Normal load avg
# Cache for some seconds
if(not defined $self->{'load_status'} or
$self->{'load_status_cache_time'} + $self->{'recheck'} < time) {
$self->{'load_status'} = load_status_linux() if $^O ne 'darwin';
$self->{'load_status'} = load_status_darwin() if $^O eq 'darwin';
$self->{'load_status_cache_time'} = time;
}
}
::debug("load_status: ".$self->{'load_status'}."\n");
return $self->{'load_status'};
}
sub undef_as_zero {
my $a = shift;
return $a ? $a : 0;
}
sub load_status_linux {
my ($loadavg);
if(open(IN,"/proc/loadavg")) {
# Linux specific (but fast)
my $upString = <IN>;
if($upString =~ m/^(\d+\.\d+)/) {
$loadavg = $1;
} else {
::die_bug("proc_loadavg");
}
close IN;
} elsif (open(IN,"uptime|")) {
my $upString = <IN>;
if($upString =~ m/averages?.\s*(\d+\.\d+)/) {
$loadavg = $1;
} else {
::die_bug("uptime");
}
close IN;
}
return $loadavg;
}
sub load_status_darwin {
my $loadavg = `sysctl vm.loadavg`;
if($loadavg =~ /vm\.loadavg: { ([0-9.]+) ([0-9.]+) ([0-9.]+) }/) {
$loadavg = $1;
} elsif (open(IN,"LANG=C uptime|")) {
my $upString = <IN>;
if($upString =~ m/averages?.\s*(\d+\.\d+)/) {
$loadavg = $1;
} else {
::die_bug("uptime");
}
close IN;
}
return $loadavg;
}
sub swap_status {
# Returns:
# (swap in)*(swap out) kb
my $self = shift;
my $status;
# Cache for some seconds
if(not defined $self->{'swap_status'} or
$self->{'swap_status_cache_time'}+$self->{'recheck'} < time) {
$status = swap_status_linux() if $^O ne 'darwin';
$status = swap_status_darwin() if $^O eq 'darwin';
$self->{'swap_status'} = ::max($status,0);
$self->{'swap_status_cache_time'} = time;
}
::debug("swap_status: $self->{'swap_status'}\n");
return $self->{'swap_status'};
}
sub swap_status_linux {
my $swap_activity;
$swap_activity = "vmstat 1 2 | tail -n1 | awk '{print \$7*\$8}'";
# Run swap_activity measuring.
return qx{ $swap_activity };
}
sub swap_status_darwin {
# Mach Virtual Memory Statistics: (page size of 4096 bytes, cache hits 0%)
# free active spec inactive wire faults copy 0fill reactive pageins pageout
# 298987 251463 162637 69437 265724 29730558 299022 2308237 1 110058 0
# 298991 251479 162637 69437 265726 43 4 16 0 0 0
my ($pagesize, $pageins, $pageouts);
my @vm_stat = `vm_stat 1 | head -n4`;
$pagesize = $1 if $vm_stat[0] =~ m/page size of (\d+) bytes/;
$pageins = (split(/\s+/,$vm_stat[3]))[9];
$pageouts = (split(/\s+/,$vm_stat[3]))[10];
return ($pageins*$pageouts*$pagesize)/1024;
}
sub mem_status {
# Returns:
# number of bytes (free+cache)
my $self = shift;
# Cache for one second
if(not defined $self->{'mem_status'} or
$self->{'mem_status_cache_time'}+$self->{'recheck'} < time) {
$self->{'mem_status'} = mem_status_linux() if $^O ne 'darwin';
$self->{'mem_status'} = mem_status_darwin() if $^O eq 'darwin';
$self->{'mem_status_cache_time'} = time;
}
::debug("mem_status: $self->{'mem_status'}\n");
return $self->{'mem_status'};
}
sub mem_status_linux {
# total used free shared buffers cached
# Mem: 3366496 2901664 464832 0 179228 1850692
# -/+ buffers/cache: 871744 2494752
# Swap: 6445476 1396860 5048616
my @free = `free`;
my $free = (split(/\s+/,$free[2]))[3];
return $free*1024;
}
sub mem_status_darwin {
# Mach Virtual Memory Statistics: (page size of 4096 bytes, cache hits 0%)
# free active spec inactive wire faults copy 0fill reactive pageins pageout
# 298987 251463 162637 69437 265724 29730558 299022 2308237 1 110058 0
# 298991 251479 162637 69437 265726 43 4 16 0 0 0
my ($pagesize, $pages_free, $pages_speculative);
my @vm_stat = `vm_stat 1 | head -n4`;
$pagesize = $1 if $vm_stat[0] =~ m/page size of (\d+) bytes/;
$pages_free = (split(/\s+/,$vm_stat[3]))[0];
$pages_speculative = (split(/\s+/,$vm_stat[3]))[2];
return ($pages_free+$pages_speculative)*$pagesize;
}
sub io_status {
# Returns:
# max percent for all devices
my $self = shift;
# Cache for one second
if(not defined $self->{'io_status'} or
$self->{'io_status_cache_time'}+$self->{'recheck'} < time) {
$self->{'io_status'} = io_status_linux() if $^O ne 'darwin';
$self->{'io_status'} = io_status_darwin() if $^O eq 'darwin';
$self->{'io_status_cache_time'} = time;
}
::debug("io_status: $self->{'io_status'}\n");
return $self->{'io_status'};
}
sub io_status_linux {
# Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util
# sda 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
my @iostat_out = `LANG=C iostat -x 1 2`;
# throw away all execpt the last Device:-section
my @iostat;
for(reverse @iostat_out) {
/Device:/ and last;
push @iostat, (split(/\s+/,$_))[13];
}
my $io = ::max(@iostat);
return undef_as_zero($io)/10;
}
sub io_status_darwin {
# disk0 disk1 disk2
# KB/t tps MB/s KB/t tps MB/s KB/t tps MB/s
# 14.95 15 0.22 11.18 35 0.38 2.00 0 0.00
# 0.00 0 0.00 0.00 0 0.00 0.00 0 0.00
my @iostat_out = `LANG=C iostat -d -w 1 -c 2`;
# return the MB/s of the last second (not the %util)
my @iostat = split(/\s+/, $iostat_out[3]);
my $io = $iostat[3] + $iostat[6] + $iostat[9];
return ::min($io, 10);
}
$::exitsignal = $::exitstatus = 0; # Dummy
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