foreach(1..$number_of_cpus)
	{
	open(TEMP_CTRL,">temp_ctrl");
	print TEMP_CTRL "$_"; # contains information for swap.pl
	close TEMP_CTRL;
	system("swap.pl"); # swap.pl reads temp_ctrl to know which part of the dataset to process
	sleep(1);
	}

##</code><code>##

system(1,"swap.pl")