Ethereal-users: [Ethereal-users] RTT stats for TCP segments

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From: Alexandros Papadopoulos <apapadop@xxxxxxxxxxxxxx>
Date: Mon, 24 Jan 2005 15:52:44 +0200
Hi again.

I'm trying to profile the network behavior of a client/server 
application over a relatively unstable link. It's pretty slow, and I'm 
trying to figure out who's to blame (the link or the application).

To put the link out of the question, it would be great if one had a 
measure of how long each client request took to be replied to. (of 
course that assumes that the server is ultra-fast, but it'll do)

I noticed that there is a nice field in the TCP analysis part of packet 
display, which for a certain TCP segment tells us:
[The RTT to ACK the segment was: 0.000424000 seconds]

This is precious information - it would be ideal if it was possible to 
present it somehow aggregated - either with a graph or an exportable 
ASCII table (list?) that could be further processed. The graph for 
instance could be called "Round Trip Time to ACK segments", with the Y 
axis representing the mean time to ACK all segments ACK'ed during that 
tick.

Does such a feature exist, or can this information be otherwise obtained 
in some way?

Thanks

-A