elsif ($msg =~ /^open\s(.*)$/)
{
	my $thrid = threads->create("serial_logger", $n_workers, $mgr_fh);
	push(@worker_id, $thrid);
	$worker_req_q[$n_workers]->enqueue($msg);
	my $ret = $worker_ack_q[$n_workers]->dequeue;
	$mgr_ack_q->enqueue($ret);
	++$n_workers;
}
elsif ($msg eq "run")
{
	$mgr_state = "running";
	broadcast_to_workers("run");
}