/usr/share/perl5/OAR/WindowForker.pm is in oar-server 2.5.6-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 | package OAR::WindowForker;
require Exporter;
use strict;
use warnings;
use POSIX ":sys_wait_h";
use OAR::Conf qw(init_conf get_conf is_conf get_conf_with_default_param);
use OAR::Modules::Judas qw(oar_debug oar_warn oar_error set_current_log_category);
use IPC::SysV qw(IPC_NOWAIT);
use Data::Dumper;
use OAR::IO;
# Log category
set_current_log_category('WindowForker');
# Declaration of the named pipe used by Hulot module
my $FIFO="/tmp/oar_hulot_pipe";
my $NOTIFY_HULOT = 1;
my $USE_TIME = 1;
unless (eval "use Time::HiRes qw(gettimeofday tv_interval);1"){
$USE_TIME = 0;
}
my $DEFAULT_WINDOW_SIZE = 5;
my $DEFAULT_TIMEOUT = 30;
select STDOUT;
$| = 1;
# Treate finished processes
sub register_wait_results($$$$$$$){
my ($pid,
$return_code,
$running_processes,
$process_duration,
$finished_processes,
$nb_running_processes,
$verbose) = @_;
my $exit_value = $return_code >> 8;
my $signal_num = $return_code & 127;
my $dumped_core = $return_code & 128;
if ($pid > 0){
if (defined($running_processes->{$pid})){
$process_duration->{$running_processes->{$pid}}->{"end"} = [gettimeofday()] if ($USE_TIME == 1);
warn("[VERBOSE] Child process $pid ended : exit_value = $exit_value, signal_num = $signal_num, dumped_core = $dumped_core \n") if ($verbose);
$finished_processes->{$running_processes->{$pid}} = [$exit_value,$signal_num,$dumped_core];
delete($running_processes->{$pid});
$$nb_running_processes--;
}
}
}
## launch
# Input parameters:
# - commands (ref on an array)
# - window size (scalar)
# - window time (scalar)
# - timeout (scalar)
# - verbose (0 or 1)
# - type of task (ref on a hash). Default is : %hash = ("type" => "default")
sub launch($$$$$$){
my ($commands,
$window_size,
$window_time,
$timeout,
$verbose,
$type) = @_;
my $index = 0;
my %running_processes;
my $nb_running_processes = 0;
my %finished_processes;
my %process_duration;
my $nextWindowTime = 0 ;
my $nb_launching_processes_in_window = 0 ;
# Check if there is at least one command to connect to
if ($#{$commands} < 0){
warn("/!\\ No command specified\n");
return(\%finished_processes, \%process_duration);
}
# Check window size integrity
if (!defined($window_size)){
$window_size = $DEFAULT_WINDOW_SIZE;
}elsif ($window_size < 1){
warn("/!\\ Window size $window_size too small; minimum is 1!\n");
return(\%finished_processes, \%process_duration);
}
# Check timeout
if (!defined($timeout)){
$timeout = $DEFAULT_TIMEOUT;
}elsif ($timeout <= 0){
warn("/!\\ Timeout cannot be negative; $timeout\n");
return(\%finished_processes, \%process_duration);
}
# Check Window time (in seconds)
if (!defined($window_time)){
$window_time = 0;
}elsif ($window_time < 0){
warn("/!\\ Time between each window cannot be negative; $window_time.\nMinimum is 0 for no limit between each window");
return(\%finished_processes, \%process_duration);
}
# Check window time integrity with timeout
if ($window_time >= $timeout){
warn("/!\\ Time between each window ($window_time sec) must be smaller than timeout ($timeout sec)");
return(\%finished_processes, \%process_duration);
}
if (!defined($type)){
$type = {"type" => "default"};
$NOTIFY_HULOT = 0;
}
my %forker_type = %$type;
# Check type
if (keys(%forker_type)<=0){
oar_error("[WindowForker] No type specified. Set to default type\n");
%forker_type = ("type" => "default");
}
warn("[VERBOSE] Window size : $window_size\n") if ($verbose);
warn("[VERBOSE] Timeout for each command : $timeout\n") if ($verbose);
# Start to launch subprocesses with the window limitation
my @timeout;
my $pid;
while (($index <= $#{$commands}) or ($#timeout >= 0)){
warn("[VERBOSE] ".time." | $index / $#{$commands}\n") if ($verbose);
# Check if window is full or not
while((($nb_running_processes) < $window_size) and ($index <= $#{$commands})){
# Check if previous window time is finished
if((time() >= $nextWindowTime) and ($nb_launching_processes_in_window < $window_size)){
warn("[VERBOSE] ".time." | fork process: $commands->[$index]\n") if ($verbose);
$process_duration{$index}->{"start"} = [gettimeofday()] if ($USE_TIME == 1);
$pid = fork();
warn("[VERBOSE] ".time." | $pid pid = $pid\n") if ($verbose);
if (defined($pid)){
if ($pid == 0){
#In the child
warn("[VERBOSE] ".time." | $pid Execute command : $commands->[$index]\n") if ($verbose);
if($forker_type{"type"} eq "Hulot"){
# If Hulot request
my $command_to_exec="";
(my $cmd, my $node)=split(/:/,$commands->[$index],2);
my $base = OAR::IO::connect()
or die("[Hulot] Cannot connect to the database\n");
if ($cmd eq "WAKEUP"){
$command_to_exec = "echo \"$node\" | ".get_conf("ENERGY_SAVING_NODE_MANAGER_WAKE_UP_CMD");
OAR::IO::add_new_event_with_host($base,"WAKEUP_NODE",0,"Node $node wake-up request",[$node] );
}elsif ($cmd eq "HALT"){
$command_to_exec = "echo \"$node\" | ".get_conf("ENERGY_SAVING_NODE_MANAGER_SLEEP_CMD");
OAR::IO::add_new_event_with_host($base,"HALT_NODE",0,"Node $node halt request",[$node] );
}
OAR::IO::disconnect($base);
system($command_to_exec);
if (!msgsnd($forker_type{"id_msg"}, pack($forker_type{"template"}, 1, "$node:$cmd:".$?), IPC_NOWAIT)){
oar_error("[WindowForker] Failed to send message to Hulot by msgsnd(): $!\n");
}
exit 0;
}else{
exec($commands->[$index]);
}
}
else{
$running_processes{$pid} = $index;
$nb_running_processes++;
push(@timeout, [$pid,time()+$timeout]);
$nb_launching_processes_in_window++;
if ($nb_launching_processes_in_window >= $window_size){
# This window is full and we will be ready to start a new window once the current window will finish
warn("[DEBUG WINDFORKER] [".time."] [$pid] (NB launching = $nb_launching_processes_in_window) This window is full and we will be ready to start a new window once the current window will finish\n") if ($verbose);
$nb_launching_processes_in_window=0;
$nextWindowTime = time()+$window_time;
warn("[DEBUG WINDFORKER] [".time."] [$pid] (NB launching = $nb_launching_processes_in_window) Set new nextWindowTime at $nextWindowTime)\n") if ($verbose);
}
}
}else{
warn("/!\\ fork system call failed for command: $commands->[$index]\n");
}
$index++;
}
}
# Check child endings
warn("[VERBOSE] ".time." | $pid Check child endings\n") if ($verbose);
while(($pid = waitpid(-1, WNOHANG)) > 0) {
register_wait_results($pid, $?, \%running_processes, \%process_duration, \%finished_processes, \$nb_running_processes, $verbose);
}
# Check timeouts (at least every 0.1s)
warn("[VERBOSE] ".time." | $pid Check timeouts\n") if ($verbose);
my $t = 0;
while(defined($timeout[$t]) and (($timeout[$t]->[1] < time()) or (!defined($running_processes{$timeout[$t]->[0]})))){
if (!defined($running_processes{$timeout[$t]->[0]})){
splice(@timeout,$t,1);
}else{
if ($timeout[$t]->[1] <= time()){
kill(9,$timeout[$t]->[0]);
}
}
$t++;
}
select(undef,undef,undef,0.1) if ($t == 0);
}
if ($NOTIFY_HULOT == 1){
## Here, send "CHECK signal" to Hulot by the named pipe ?
unless (open(FIFO, "> $FIFO")) {
oar_error("[WindowForker] Could not open the fifo $FIFO!\n");
return 1;
}
print FIFO "CHECK";
close(FIFO);
}
return(\%finished_processes, \%process_duration);
}
return 1;
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