Re: [ns] What is difference between +(enque) operation and r(receive) operation in Trace File Format?

[Hyunah Park <hyunahpa@isi.edu>]

What you miss is the 3rd and 4th columns of trace format.
Those fields indicate between which 2 nodes tracing is happened.
The first 3 operations on 610 happen between 0 and 2,
and the next 2 (+,d) are between 2 and 3.
- Hyunah

> Hi. I want to get q length of each flow.
> So Try to make some perl script useing queue monitors output
> Here are NS Manual's example
> + 1.84375 0 2 cbr 210 ------- 0 0.0 3.1 225 610
> - 1.84375 0 2 cbr 210 ------- 0 0.0 3.1 225 610
> r 1.84471 2 1 cbr 210 ------- 1 3.0 1.0 195 600
> r 1.84566 2 0 ack 40 ------- 2 3.2 0.1 82 602
> + 1.84566 0 2 tcp 1000 ------- 2 0.1 3.2 102 611
> - 1.84566 0 2 tcp 1000 ------- 2 0.1 3.2 102 611
> r 1.84609 0 2 cbr 210 ------- 0 0.0 3.1 225 610
> + 1.84609 2 3 cbr 210 ------- 0 0.0 3.1 225 610
> d 1.84609 2 3 cbr 210 ------- 0 0.0 3.1 225 610
> - 1.8461 2 3 cbr 210 ------- 0 0.0 3.1 192 511
> r 1.84612 3 2 cbr 210 ------- 1 3.0 1.0 196 603
> + 1.84612 2 1 cbr 210 ------- 1 3.0 1.0 196 603
> - 1.84612 2 1 cbr 210 ------- 1 3.0 1.0 196 603
> + 1.84625 3 2 cbr 210 ------- 1 3.0 1.0 199 612
>
> Ok. last field is packet identifier right? and it's unique.
> But 1st line 610 packet enque and next deque. but 7th line 610 packet againe
> received and enque and dropped.
> How can this happen? packet identifier is not unique?
> or... What is differnece between +, r operation?
> How can I get q length??? I think using +, -, q field enough. Do I miss
> something?
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