Hi All,

The program is working fine. I modified it using PERL hash. It is fast and I am happy.

This is a very late reply but I thought i can share what I did.

The logic is:
1. Look for AGT events. Then make a hash key by combining event 's' or 'r' with packet id. ( hash_key = s<pktid> or r<pktid>) and store the corresponding time as hash value)
2. The above runs through all lines of the trace file and build hashtable.
3. then calculate delay for every packet_id.

while(<DATA>)
{
    @x=split(' ');
    if($x[3] eq 'AGT')
    {
        $hash_key = $x[0].$x[5];
        $hash_value = $x[1];
        $hash_table{"$hash_key"} = $hash_value;

        if($x[5] gt $last_packet_id)
        {
            $last_packet_id = $x[5];
        }
    }
}

$simulation_time = $x[1];

for($packet_id = 0;$packet_id<=$last_packet_id;$packet_id++)
{
    $hash_key = "s".$packet_id;
        $enqueue_time = $hash_table{"$hash_key"};
        $total_enqueue_count++;
    $hash_key = "r".$packet_id;
    if(exists($hash_table{$hash_key}))
    {
        $receive_time = $hash_table{"$hash_key"};
    }
    else
    {
                $total_drop_count++;
        next;
    }
    $total_receive_count++;
    $delay = $receive_time - $enqueue_time;
    $sum_of_delay = $sum_of_delay + $delay;

#    $delay = $delay * 1000;
#       print("\nDelay:$delay");

}
[download]

Thanks a lot for your help.