Date: Wed, 13 Nov 2002 16:00:22 +0100 Subject: tcptrace RTT caltulation Message-ID: <20021113150022.GA14834@pusa.informat.uv.es> From: uaca@alumni.uv.es
I have read rexmit.c:rtt_ackin() and I belive that RTT meassurement is the
following:
<Monitorization Host>
|
|
[Host A] ))))))))))))))))))))))))))>>>>>>>>>>>>>>>>>>>>>>>>>>> [Host B]
((((((((((((((((((((((((((<<<<<<<<<<<<<<<<<<<<<<<<<<<
")" or ">" is the data segment
"(" or "<" is the ACK segment for the corresponding data segment
Where the time meassured for RTT is the time that is the sum of ">" and "<"
I suposse here the monitorization is being done in the "middle" of the connection
That is, tcptrace's RTT is not like the RTT meassured in the "ping" utility,
in other words is not a "two full way transmision" meassurement
Thanks in advance
Ulisses
Debian GNU/Linux: a dream come true
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