Re: [ns] Meaning of 'r' in Trace File

[Lloyd Wood <l.wood@eim.surrey.ac.uk>]

On Mon, 17 Dec 2001, jie zhang wrote:

>    I generated a tracefile,some entries like this:
>
>    1:   r 0.51032 0 2 tcp 40 ------- 1 0.0 3.0 0 0
>    2:   + 0.51032 2 3 tcp 40 ------- 1 0.0 3.0 0 0
>    3:   - 0.51032 2 3 tcp 40 ------- 1 0.0 3.0 0 0
>    4:   r 0.52064 2 3 tcp 40 ------- 1 0.0 3.0 0 0
>    5:   + 0.52064 3 2 ack 40 ------- 1 3.0 0.0 0 1
>    6:   - 0.52064 3 2 ack 40 ------- 1 3.0 0.0 0 1
>
>    The topology is:
>
>           n0--
>                \
>                 \
>                   n2--------n3
>                 /
>                /
>            n1--
>
>    The problem is: How can I distinguish line 1 and
> line 4.

You go on to distinguish between them:

> They are both "r",but the first "r" happened
> between 0 and 2,the second "r" happened between 2 and
> 3.

You have distinguished between them.

That answers your question.

(write an awk script to evaluate $3 etc.)

L.

> From ns manual, I know "+" represents enqueue,"-"
> represents dequeue,I think "r" represent a packet
> receive at an Agent,is it right?

<L.Wood@surrey.ac.uk>PGP<http://www.ee.surrey.ac.uk/Personal/L.Wood/>