mirror of
https://git.savannah.gnu.org/git/parallel.git
synced 2024-11-23 06:27:55 +00:00
643 lines
17 KiB
Perl
Executable file
643 lines
17 KiB
Perl
Executable file
#!/usr/bin/perl -w
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# Copyright (C) 2004,2005,2006,2006,2008,2009,2010 Ole Tange,
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# http://ole.tange.dk
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#
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# Copyright (C) 2010,2011 Ole Tange, http://ole.tange.dk and Free
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# Software Foundation, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, see <http://www.gnu.org/licenses/>
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# or write to the Free Software Foundation, Inc., 51 Franklin St,
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# Fifth Floor, Boston, MA 02110-1301 USA
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use strict;
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use Getopt::Long;
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$Global::progname="niceload";
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$Global::version = 20111010;
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Getopt::Long::Configure("bundling","require_order");
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get_options_from_array(\@ARGV) || die_usage();
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if($::opt_version) {
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version();
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exit 0;
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}
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if($::opt_help) {
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help();
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exit 0;
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}
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if($::opt_factor and $::opt_suspend) {
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# You cannot have --suspend and --factor
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help();
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exit;
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}
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if(not (defined $::opt_start_io or defined $::opt_run_io
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or defined $::opt_start_load or defined $::opt_run_load
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or defined $::opt_start_mem or defined $::opt_run_mem
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or defined $::opt_start_noswap or defined $::opt_run_noswap
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or defined $::opt_io or defined $::opt_load
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or defined $::opt_mem or defined $::opt_noswap)) {
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# Default is --runload=1
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$::opt_run_load = 1;
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}
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if(not defined $::opt_start_io) { $::opt_start_io = $::opt_io; }
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if(not defined $::opt_run_io) { $::opt_run_io = $::opt_io; }
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if(not defined $::opt_start_load) { $::opt_start_load = $::opt_load; }
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if(not defined $::opt_run_load) { $::opt_run_load = $::opt_load; }
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if(not defined $::opt_start_mem) { $::opt_start_mem = $::opt_mem; }
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if(not defined $::opt_run_mem) { $::opt_run_mem = $::opt_mem; }
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if(not defined $::opt_start_noswap) { $::opt_start_noswap = $::opt_noswap; }
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if(not defined $::opt_run_noswap) { $::opt_run_noswap = $::opt_noswap; }
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my $limit = Limit->new();
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my $process = Process->new($::opt_nice,@ARGV);
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if(not $::opt_pid) {
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# Wait until limit is below start_limit and run_limit
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while($limit->over_start_limit()
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or
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($limit->hard() and $limit->over_run_limit())) {
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$limit->sleep_for_recheck();
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}
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}
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$process->start();
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while($process->is_alive()) {
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if($limit->over_run_limit()) {
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$process->suspend();
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$limit->sleep_for_recheck();
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if(not $limit->hard()) {
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$process->resume();
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$limit->sleep_while_running();
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}
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} else {
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$process->resume();
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$limit->sleep_while_running();
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}
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}
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sub get_options_from_array {
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# Run GetOptions on @array
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# Returns:
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# true if parsing worked
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# false if parsing failed
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# @array is changed
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my $array_ref = shift;
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# A bit of shuffling of @ARGV needed as GetOptionsFromArray is not
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# supported everywhere
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my @save_argv;
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my $this_is_ARGV = (\@::ARGV == $array_ref);
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if(not $this_is_ARGV) {
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@save_argv = @::ARGV;
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@::ARGV = @{$array_ref};
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}
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my @retval = GetOptions
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("debug|D" => \$::opt_debug,
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"factor|f=s" => \$::opt_factor,
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"hard|H" => \$::opt_hard,
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"soft|S" => \$::opt_soft,
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"si|sio|startio|start-io=s" => \$::opt_start_io,
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"ri|rio|runio|run-io=s" => \$::opt_run_io,
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"io|I=s" => \$::opt_io,
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"sl|startload|start-load=s" => \$::opt_start_load,
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"rl|runload|run-load=s" => \$::opt_run_load,
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"load|L|l=s" => \$::opt_load,
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"sm|startmem|start-mem=s" => \$::opt_start_mem,
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"rm|runmem|run-mem=s" => \$::opt_run_mem,
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"mem|M=s" => \$::opt_mem,
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"sn|startnoswap|start-noswap|start-no-swap" => \$::opt_start_noswap,
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"rn|runnoswap|run-noswap|run-no-swap" => \$::opt_run_noswap,
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"noswap|N" => \$::opt_noswap,
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"nice|n=i" => \$::opt_nice,
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"process|pid|p=s" => \$::opt_pid,
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"suspend|s=s" => \$::opt_suspend,
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"recheck|t=s" => \$::opt_recheck,
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"quote|q" => \$::opt_quote,
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"help|h" => \$::opt_help,
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"verbose|v" => \$::opt_verbose,
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"version|V" => \$::opt_version,
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);
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if(not $this_is_ARGV) {
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@{$array_ref} = @::ARGV;
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@::ARGV = @save_argv;
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}
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return @retval;
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}
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sub die_usage {
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help();
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exit 1;
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}
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sub help {
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print q{
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Usage:
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niceload [-v] [-n niceness] [-L loadavg] [-I io] [-N] [-M mem]
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[-s suspend_sec|-f factor] [-H] [-S]
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command or -p pid
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};
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}
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sub die_bug {
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my $bugid = shift;
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print STDERR
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("$Global::progname: This should not happen. You have found a bug.\n",
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"Please contact <parallel\@gnu.org> and include:\n",
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"* The version number: $Global::version\n",
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"* The bugid: $bugid\n",
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"* The command line being run\n",
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"* The files being read (put the files on a webserver if they are big)\n",
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"\n",
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"If you get the error on smaller/fewer files, please include those instead.\n");
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exit(255);
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}
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sub usleep {
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# Sleep this many milliseconds.
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my $secs = shift;
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::debug("Sleeping ",$secs," millisecs\n");
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select(undef, undef, undef, $secs/1000);
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}
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sub debug {
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if($::opt_debug) {
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print STDERR @_;
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}
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}
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sub my_dump {
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# Returns:
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# ascii expression of object if Data::Dump(er) is installed
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# error code otherwise
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my @dump_this = (@_);
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eval "use Data::Dump qw(dump);";
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if ($@) {
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# Data::Dump not installed
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eval "use Data::Dumper;";
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if ($@) {
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my $err = "Neither Data::Dump nor Data::Dumper is installed\n".
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"Not dumping output\n";
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print STDERR $err;
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return $err;
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} else {
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return Dumper(@dump_this);
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}
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} else {
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eval "use Data::Dump qw(dump);";
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return (Data::Dump::dump(@dump_this));
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}
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}
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sub version {
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# Returns: N/A
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print join("\n",
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"GNU $Global::progname $Global::version",
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"Copyright (C) 2004,2005,2006,2007,2008,2009 Ole Tange",
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"Copyright (C) 2010,2011 Ole Tange and Free Software Foundation, Inc.",
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"License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>",
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"This is free software: you are free to change and redistribute it.",
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"GNU $Global::progname comes with no warranty.",
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"",
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"Web site: http://www.gnu.org/software/parallel\n"
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);
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}
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sub multiply_binary_prefix {
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# Evalualte numbers with binary prefix
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# 13G = 13*1024*1024*1024 = 13958643712
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my $s = shift;
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$s =~ s/Ki?/*1024/gi;
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$s =~ s/Mi?/*1024*1024/gi;
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$s =~ s/Gi?/*1024*1024*1024/gi;
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$s =~ s/Ti?/*1024*1024*1024*1024/gi;
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$s =~ s/Pi?/*1024*1024*1024*1024*1024/gi;
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$s =~ s/Ei?/*1024*1024*1024*1024*1024*1024/gi;
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$s =~ s/Zi?/*1024*1024*1024*1024*1024*1024*1024/gi;
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$s =~ s/Yi?/*1024*1024*1024*1024*1024*1024*1024*1024/gi;
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$s =~ s/Xi?/*1024*1024*1024*1024*1024*1024*1024*1024*1024/gi;
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$s = eval $s;
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return $s;
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}
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sub max {
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# Returns:
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# Maximum value of array
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my $max;
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for (@_) {
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# Skip undefs
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defined $_ or next;
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defined $max or do { $max = $_; next; }; # Set $_ to the first non-undef
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$max = ($max > $_) ? $max : $_;
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}
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return $max;
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}
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package Process;
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sub new {
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my $class = shift;
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my $nice = shift;
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my @ARGV = @_;
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if($nice) {
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unshift(@ARGV, "nice", "-n", $nice);
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}
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return bless {
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'running' => 0, # Is the process running now?
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'command' => [@ARGV],
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}, ref($class) || $class;
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}
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sub start {
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# Start the program
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my $self = shift;
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::debug("Starting @{$self->{'command'}}\n");
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$self->{'running'} = 1;
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if($self->{'pid'} = fork) {
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# set signal handler to kill children if parent is killed
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push @{$self->{'pids'}}, $self->{'pid'};
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$Global::process = $self;
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$SIG{CHLD} = \&REAPER;
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$SIG{INT}=\&kill_child_INT;
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$SIG{TSTP}=\&kill_child_TSTP;
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$SIG{CONT}=\&kill_child_CONT;
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sleep 1; # Give child time to setpgrp(0,0);
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$self->{'pgrp'} = getpgrp $self->{'pid'};
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} else {
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setpgrp(0,0);
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::debug("Child pid: $$, pgrp: ",getpgrp $$,"\n");
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::debug("@{$self->{'command'}}\n");
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if($::opt_quote) {
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system(@{$self->{'command'}});
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} else {
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system("@{$self->{'command'}}");
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}
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::debug("Child exit\n");
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exit;
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}
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}
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use POSIX ":sys_wait_h";
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sub REAPER {
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my $stiff;
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while (($stiff = waitpid(-1, &WNOHANG)) > 0) {
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# do something with $stiff if you want
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}
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$SIG{CHLD} = \&REAPER; # install *after* calling waitpid
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}
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sub kill_child_CONT {
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my $self = $Global::process;
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::debug("SIGCONT received. Killing $self->{'pid'}\n");
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kill CONT => -getpgrp($self->{'pid'});
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}
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sub kill_child_TSTP {
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my $self = $Global::process;
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::debug("SIGTSTP received. Killing $self->{'pid'} and self ($$)\n");
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kill TSTP => -getpgrp($self->{'pid'});
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kill STOP => -$$;
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kill STOP => $$;
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}
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sub kill_child_INT {
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my $self = $Global::process;
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::debug("SIGINT received. Killing $self->{'pid'} Exit\n");
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kill INT => -getpgrp($self->{'pid'});
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exit;
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}
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sub resume {
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my $self = shift;
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::debug("Resume @{$self->{'pids'}}\n");
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if(not $self->{'running'}) {
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# - = PID group
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map { kill "CONT", -$_ } @{$self->{'pids'}};
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$self->{'running'} = 1;
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}
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}
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sub suspend {
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my $self = shift;
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::debug("Suspend @{$self->{'pids'}}\n");
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if($self->{'running'}) {
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# - = PID group
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map { kill "STOP", -$_ } @{$self->{'pids'}};
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$self->{'running'} = 0;
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}
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}
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sub is_alive {
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# The process is dead if none of the pids exist
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my $self = shift;
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my ($exists) = 0;
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for my $pid (@{$self->{'pids'}}) {
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if(kill 0 => $pid) { $exists++ }
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}
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::debug("is_alive: $exists\n");
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return $exists;
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}
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package Limit;
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sub new {
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my $class = shift;
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my %limits = @_;
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my $hard = $::opt_soft ? 0 : $::opt_hard;
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my $runio = $::opt_run_io ? ::multiply_binary_prefix($::opt_run_io) : 0;
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my $startio = $::opt_start_io ? ::multiply_binary_prefix($::opt_start_io) : 0;
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my $runload = $::opt_run_load ? ::multiply_binary_prefix($::opt_run_load) : 0;
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my $startload = $::opt_start_load ? ::multiply_binary_prefix($::opt_start_load) : 0;
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my $runmem = $::opt_run_mem ? ::multiply_binary_prefix($::opt_run_mem) : 0;
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my $startmem = $::opt_start_mem ? ::multiply_binary_prefix($::opt_start_mem) : 0;
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my $runnoswap = $::opt_run_noswap ? ::multiply_binary_prefix($::opt_run_noswap) : 0;
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my $startnoswap = $::opt_start_noswap ? ::multiply_binary_prefix($::opt_start_noswap) : 0;
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return bless {
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'hard' => $hard,
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'recheck' => 1, # Default
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'runtime' => 1, # Default
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'runio' => $runio,
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'startio' => $startio,
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'runload' => $runload,
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'startload' => $startload,
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'runmem' => $runmem,
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'startmem' => $startmem,
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'runnoswap' => $runnoswap,
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'startnoswap' => $startnoswap,
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'factor' => $::opt_factor || 1,
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'recheck' => $::opt_recheck || 1,
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'runtime' => $::opt_recheck || 1,
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'over_run_limit' => 1,
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'over_start_limit' => 1,
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'verbose' => $::opt_verbose,
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}, ref($class) || $class;
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}
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sub over_run_limit {
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my $self = shift;
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my $status = 0;
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if($self->{'runmem'}) {
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# mem should be between 0-10ish
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# 100% available => 0 (1-1)
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# 50% available => 1 (2-1)
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# 10% available => 9 (10-1)
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my $mem = $self->mem_status();
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::debug("Run memory: $self->{'runmem'}/$mem\n");
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$status += (::max(1,$self->{'runmem'}/$mem)-1);
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}
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if($self->{'runload'}) {
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# load should be between 0-10ish
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# 0 load => 0
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my $load = $self->load_status();
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$status += ::max(0,$load - $self->{'runload'});
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}
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if($self->{'runnoswap'}) {
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# swap should be between 0-10ish
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# swap in or swap out or no swap = 0
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# else log(swapin*swapout)
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my $swap = $self->swap_status();
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$status += log(::max(1, $swap - $self->{'runnoswap'}));
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}
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if($self->{'runio'}) {
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my $io = $self->io_status();
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$status += ::max(0,$io - $self->{'runio'});
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}
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$self->{'over_run_limit'} = $status;
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if(not $::opt_recheck) {
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$self->{'recheck'} = $self->{'factor'} * $self->{'over_run_limit'};
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}
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::debug("over_run_limit: $status\n");
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return $self->{'over_run_limit'};
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}
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sub over_start_limit {
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my $self = shift;
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my $status = 0;
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if($self->{'startmem'}) {
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# mem should be between 0-10ish
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# 100% available => 0 (1-1)
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# 50% available => 1 (2-1)
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# 10% available => 9 (10-1)
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my $mem = $self->mem_status();
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::debug("Start memory: $self->{'startmem'}/$mem\n");
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$status += (::max(1,$self->{'startmem'}/$mem)-1);
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}
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if($self->{'startload'}) {
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# load should be between 0-10ish
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# 0 load => 0
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my $load = $self->load_status();
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$status += ::max(0,$load - $self->{'startload'});
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}
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if($self->{'startnoswap'}) {
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# swap should be between 0-10ish
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# swap in or swap out or no swap = 0
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# else log(swapin*swapout)
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my $swap = $self->swap_status();
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$status += log(::max(1, $swap - $self->{'startnoswap'}));
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}
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if($self->{'startio'}) {
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my $io = $self->io_status();
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$status += ::max(0,$io - $self->{'startio'});
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}
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$self->{'over_start_limit'} = $status;
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if(not $::opt_recheck) {
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$self->{'recheck'} = $self->{'factor'} * $self->{'over_start_limit'};
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}
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::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 "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 "Running $self->{'runtime'}s\n";
|
|
}
|
|
::usleep(1); # For some reason this gets interrupted
|
|
::usleep(1000*$self->{'runtime'});
|
|
}
|
|
|
|
|
|
sub load_status {
|
|
# Returns:
|
|
# loadavg
|
|
my $self = shift;
|
|
# 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();
|
|
$self->{'load_status_cache_time'} = time;
|
|
}
|
|
::debug("load_status: $self->{'load_status'}\n");
|
|
return $self->{'load_status'};
|
|
}
|
|
|
|
|
|
sub load_status_linux {
|
|
my ($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/average.\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;
|
|
# Cache for some seconds
|
|
if(not defined $self->{'swap_status'} or
|
|
$self->{'swap_status_cache_time'}+$self->{'recheck'} < time) {
|
|
my $status = swap_status_linux();
|
|
$self->{'swap_status'} = ::max($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 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();
|
|
$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 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();
|
|
$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 $io/10;
|
|
}
|