Re: Multi-threading ping of a list of hosts.....Again!

[NetWallah]

Here is some working multi-threaded ping code I wrote a while back. Works on Win32.

#!/usr/bin/perl -w
# Parallel Pinger...

use strict;
use threads;
use Thread::Queue;
use Net::Ping;

my $master = $$;
my $verbose = $ARGV[0] eq q(-v);
my $RequestQ    = Thread::Queue->new;
my $ResultQ = Thread::Queue->new;
my $threadcount = 20;
my @kids;

# Generate list of hosts to ping
my @targets;
foreach my $target (1..95) {
  $RequestQ->enqueue ('10.2.56.' . $target);
}

for (0..($threadcount - 1)){
  $RequestQ->enqueue(undef);
  push @kids, threads->new(\&Ping_it, $_);
}


foreach (threads->list){
   $_->join;
}
$ResultQ->enqueue(undef); # Last item
while (my $target = $ResultQ->dequeue){
      print "  $target\n";
}

#############################################
sub Ping_it{
    my ($work_count, $miss_count);
    my $t = shift;
    my $pinger = Net::Ping->new('icmp', 1);

    while (my $target = $RequestQ->dequeue){
      $work_count ++;
      my $retval = 0;
      $verbose and print "Child $target started\n";
      if($pinger->ping($target)) {
        # PING! Throw it in the FIFO
            $verbose and print "Found $target!\n";
        $retval=1
      }
      else {
        warn "Thread $t $target: $!\n";
            $verbose and print "No response from $target\n";
        $retval=0;
        $miss_count++;
      }

      $ResultQ->enqueue ($target . "=" . $retval);
      threads->yield();
          $verbose and  print "Child $target exiting\n";
    }
   $pinger->close();
   $ResultQ->enqueue("Thread $t processed $work_count, missed $miss_co
+unt");

}