Re: Question about seeing Latency in TCP conversations

[Martin Visser <martinvisser99 () gmail com>]

Johnny,

The easiest way is to examine the calculated field "tcp.analysis.ack_rtt".
This appears in the details window if you have TCP Sequence Analysis on.


[image: image.png]


You have to be a little careful when using this though, as Wireshark
sometimes miscalculates this in the prescence of Duplicate ACKs. The best
way to use it (taking out effects of the server processing delay), is
during the initial handshake. So what I do is filter for "tcp.flags ==
0x12" (which is the SYN/ACK) and plot tcp.analysis.ack_rtt or add it as a
column.

[image: image.png]

Regards, Martin

MartinVisser99 () gmail com


On 5 January 2012 08:20, Sheahan, John <John.Sheahan () priceline com> wrote:

> I have been given a sniffer trace by our application guys and they want me
> to look through it to see if any of the TCP conversations have higher than
> normal latencies.****
>
> The file is kind of big and too much data for me to filter and look at
> each conversation. ****
>
> ** **
>
> Is there an easy way to do this in Wireshark?****
>
> ** **
>
> Thanks****
>
> ** **
>
> Johnny****
>
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