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niceload
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#!/usr/bin/perl -w
# Copyright (C) 2004-2010 Ole Tange, http://ole.tange.dk
#
# Copyright (C) 2010-2021 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
#
# SPDX-FileCopyrightText: 2021 Ole Tange, http://ole.tange.dk and Free Software and Foundation, Inc.
# SPDX-License-Identifier: GPL-3.0-or-later
use strict;
use Getopt::Long;
$Global::progname="niceload";
$Global::version = 20210322;
Getopt::Long::Configure("bundling","require_order");
get_options_from_array(\@ARGV) || die_usage();
if($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); }
if(defined $opt::baseline) { collect_net_baseline(); }
my $limit = Limit->new();
my $process = Process->new($opt::nice,@ARGV);
$::exitstatus = 0;
if(@opt::prg) {
# Find all pids of prg
my($children_of, $parent_of, $name_of) = pid_table();
my @exact_name_pids;
my @substr_name_pids;
for my $name (@opt::prg) {
push(@exact_name_pids,
grep { index($name_of->{$_},$name) == 0 and $_ } keys %$name_of);
push(@substr_name_pids,
grep { index($name_of->{$_},$name) != -1 and $_ } keys %$name_of);
}
# Remove current pid
@exact_name_pids = grep { $_ != $$ } @exact_name_pids;
@substr_name_pids = grep { $_ != $$ } @substr_name_pids;
my @pids;
if(@exact_name_pids) {
@pids = @exact_name_pids;
} elsif(@substr_name_pids) {
warning("@opt::prg no exact matches. Using substrings.");
my %name_pids;
for(sort @substr_name_pids) {
# If the process has run for long, then time column will
# enter the name, so remove leading digits
$name_of->{$_} =~ s/^\d+ //;
# Remove arguments
$name_of->{$_} =~ s/ .*//;
push @{$name_pids{$name_of->{$_}}},$_;
}
warning("Niceloading",
map { "$_ (".(join" ",sort @{$name_pids{$_}}).")" } keys %name_pids
);
@pids = @substr_name_pids;
} else {
error("@opt::prg no matches.");
exit(1);
}
$process->set_pid(@pids);
$::resume_process = $process;
$SIG{TERM} = $SIG{INT} = \&resume;
} elsif(@opt::pid) {
# Support --pid 3567,25678
@opt::pid = map { split /,/, $_ } @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);
{
my %pid_parentpid_cmd;
sub pid_table {
# Returns:
# %children_of = { pid -> children of pid }
# %parent_of = { pid -> pid of parent }
# %name_of = { pid -> commandname }
if(not %pid_parentpid_cmd) {
# Filter for SysV-style `ps`
my $sysv = q( ps -ef | perl -ane '1..1 and /^(.*)CO?MM?A?N?D/ and $s=length $1;).
q(s/^.{$s}//; print "@F[1,2] $_"' );
# Crazy msys: ' is not accepted on the cmd line, but " are treated as '
my $msys = q( ps -ef | perl -ane "1..1 and /^(.*)CO?MM?A?N?D/ and $s=length $1;).
q(s/^.{$s}//; print qq{@F[1,2] $_}" );
# BSD-style `ps`
my $bsd = q(ps -o pid,ppid,command -ax);
%pid_parentpid_cmd =
(
'aix' => $sysv,
'cygwin' => $sysv,
'darwin' => $bsd,
'dec_osf' => $sysv,
'dragonfly' => $bsd,
'freebsd' => $bsd,
'gnu' => $sysv,
'hpux' => $sysv,
'linux' => $sysv,
'mirbsd' => $bsd,
'msys' => $msys,
'MSWin32' => $sysv,
'netbsd' => $bsd,
'nto' => $sysv,
'openbsd' => $bsd,
'solaris' => $sysv,
'svr5' => $sysv,
'syllable' => "echo ps not supported",
);
}
$pid_parentpid_cmd{$^O} or ::die_bug("pid_parentpid_cmd for $^O missing");
my (@pidtable,%parent_of,%children_of,%name_of);
# Table with pid -> children of pid
@pidtable = `$pid_parentpid_cmd{$^O}`;
my $p=$$;
for (@pidtable) {
# must match: 24436 21224 busybox ash
# must match: 24436 21224 <<empty on MacOSX running cubase>>
# or: perl -e 'while($0=" "){}'
if(/^\s*(\S+)\s+(\S+)\s+(\S+.*)/
or
$^O eq "darwin" and /^\s*(\S+)\s+(\S+)\s+()$/) {
$parent_of{$1} = $2;
push @{$children_of{$2}}, $1;
$name_of{$1} = $3;
} else {
::die_bug("pidtable format: $_");
}
}
return(\%children_of, \%parent_of, \%name_of);
}
}
sub resume {
$::resume_process->resume();
exit(0);
}
sub status {
my @w = @_;
my $fh = *STDERR;
print $fh @w;
flush $fh;
}
sub warning {
my @w = @_;
my $prog = $Global::progname || "niceload";
status(map { ($prog, ": Warning: ", $_, "\n"); } @w);
}
sub error {
my @w = @_;
my $prog = $Global::progname || "niceload";
status(map { ($prog, ": Error: ", $_, "\n"); } @w);
}
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,
"battery|B" => \$opt::battery,
"net" => \$opt::net,
"nethops=i" => \$opt::nethops,
"baseline" => \$opt::baseline,
"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($opt::battery) {
# niceload -l -1 --sensor \
# 'cat /sys/class/power_supply/BAT0/status \
# /proc/acpi/battery/BAT0/state 2>/dev/null |
# grep -i -q discharging; echo $?'
$opt::sensor = ('cat /sys/class/power_supply/BAT0/status '.
'/proc/acpi/battery/BAT0/state 2>/dev/null | '.
'grep -i -q discharging; echo $?');
$opt::load = -1;
}
if($opt::net) {
$opt::nethops ||= 3;
}
if($opt::nethops) {
# niceload -l 0.01 --sensor 'netsensor_script'
$opt::sensor = netsensor_script($opt::nethops);
$opt::load ||= 0.01;
}
if(not $this_is_ARGV) {
@{$array_ref} = @::ARGV;
@::ARGV = @save_argv;
}
return @retval;
}
sub shell_quote_scalar {
# Quote for other shells
my $a = $_[0];
if(defined $a) {
# zsh wants '=' quoted
# Solaris sh wants ^ quoted.
# $a =~ s/([\002-\011\013-\032\\\#\?\`\(\)\{\}\[\]\^\*\>\<\~\|\; \"\!\$\&\'\202-\377])/\\$1/g;
# This is 1% faster than the above
if(($a =~ s/[\002-\011\013-\032\\\#\?\`\(\)\{\}\[\]\^\*\<\=\>\~\|\; \"\!\$\&\'\202-\377]/\\$&/go)
+
# quote newline as '\n'
($a =~ s/[\n]/'\n'/go)) {
# A string was replaced
# No need to test for "" or \0
} elsif($a eq "") {
$a = "''";
} elsif($a eq "\0") {
$a = "";
}
}
return $a;
}
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 now {
# Returns time since epoch as in seconds with 3 decimals
# Uses:
# @Global::use
# Returns:
# $time = time now with millisecond accuracy
if(not $Global::use{"Time::HiRes"}) {
if(eval "use Time::HiRes qw ( time );") {
eval "sub TimeHiRestime { return Time::HiRes::time };";
} else {
eval "sub TimeHiRestime { return time() };";
}
$Global::use{"Time::HiRes"} = 1;
}
return (int(TimeHiRestime()*1000))/1000;
}
sub usleep {
# Sleep this many milliseconds.
my $ms = shift;
::debug("Sleeping ",$ms," millisecs\n");
my $start = now();
my $now;
do {
# Something makes 'select' wake up too early
# when using --sensor
select(undef, undef, undef, $ms/1000);
$now = now();
} while($now < $start + $ms/1000);
}
sub debug {
if($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;
}
sub collect_net_baseline {
# Collect what a normal (unloaded) net connection looks line
}
sub netsensor_script {
# Script for --sensor when using --net
my $hops = shift;
my $perlscript = q{
use Net::Traceroute;
use Net::Ping;
my $medtrc = MedianTraceroute->new(shift);
$medtrc->set_remedian($medtrc->ping());
$medtrc->set_remedian($medtrc->ping());
while(1) {
my $ms = $medtrc->ping();
my $m = $medtrc->remedian();
if($m*1.5 < $ms) {
# Bad 1 = median*1.5 < current latency
} else {
# OK 0 = median*1.5 > current latency
$medtrc->set_remedian($ms);
}
printf("%d\n",$m*1.5 < $ms);
sleep(1);
}
package MedianTraceroute;
sub new {
my $class = shift;
my $hop = shift;
# Find router
my $tr = Net::Traceroute->new(host => "8.8.8.8",
max_ttl => $hop);
if($tr->found) {
$host = $tr->hop_query_host($hop, 0);
} else {
# ns1.censurfridns.dk
$tr = Net::Traceroute->new(host => "89.233.43.71",
max_ttl => $hop);
if($tr->found) {
$host = $tr->hop_query_host($hop, 0);
} else {
die("Cannot traceroute to 8.8.8.8 and 89.233.43.71");
}
}
my $p = Net::Ping->new();
$p->hires();
return bless {
'hop' => $hop,
'host' => $host,
'pinger' => $p,
'remedian_idx' => 0,
'remedian_arr' => [],
'remedian' => undef,
}, ref($class) || $class;
}
sub ping {
my $self = shift;
for(1..3) {
# Ping should never take longer than 5.5 sec
my ($ret, $duration, $ip) =
$self->{'pinger'}->ping($self->{'host'}, 5.5);
if($ret) {
return $duration;
}
}
warn("Ping failed 3 times.");
}
sub remedian {
my $self = shift;
return $self->{'remedian'};
}
sub set_remedian {
# Set median of the last 999^3 (=997002999) values using Remedian
#
# Rousseeuw, Peter J., and Gilbert W. Bassett Jr. "The remedian: A
# robust averaging method for large data sets." Journal of the
# American Statistical Association 85.409 (1990): 97-104.
my $self = shift;
my $val = shift;
my $i = $self->{'remedian_idx'}++;
my $rref = $self->{'remedian_arr'};
$rref->[0][$i%999] = $val;
$rref->[1][$i/999%999] = (sort @{$rref->[0]})[$#{$rref->[0]}/2];
$rref->[2][$i/999/999%999] = (sort @{$rref->[1]})[$#{$rref->[1]}/2];
$self->{'remedian'} = (sort @{$rref->[2]})[$#{$rref->[2]}/2];
}
};
return "perl -e ".shell_quote_scalar($perlscript)." $hops";
}
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'} < 0.01) {
# Never sleep less than 0.01 sec
$self->{'recheck'} = 0.01;
}
if($self->verbose()) {
$self->{'recheck'} = int($self->{'recheck'}*100)/100;
print STDERR "Sleeping $self->{'recheck'}s\n";
}
::debug("recheck in $self->{'recheck'}s\n");
::usleep(1000*$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 $self->{'runtime'}s\n";
}
::usleep(1000*$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
$self->{'sensor_pid'} =
open($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 $line) {
::debug("Pipe saw: [$line] eof=$eof\n");
$Global::last_sensor_reading = $line;
}
}
if($eof) {
# End of file => Restart the sensor
close $fh;
# waitpid($self->{'sensor_pid'},0);
$self->{'sensor_pid'} =
open($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");