From: Manikantan Ramadas (mramadas@cs.ohiou.edu)
Date: 06/24/03
Date: Tue, 24 Jun 2003 16:22:26 -0400 From: Manikantan Ramadas <mramadas@cs.ohiou.edu> Subject: Re: tcptrace RTT measurement method Message-ID: <20030624202226.GA2878@irg.cs.ohiou.edu>
>
> > > Standards mention that rtt should be calculated only when new data is
> > > acknowledged. Does RTT measurement of tcptrace follow this restriction ?
> >
> > Yes I believe this follows.
> >
> > Please check out ack_in() and rtt_ackin() functions in rexmit.c.
>
> Let's please get a definitive answer on this!
>
Well, the definite answer is yes :-).
tcptrace calculates RTT samples only when new data gets acknowledged.
Details are in ack_in() function in rexmit.c.
rtt_ackin() which calculates the RTT values, gets called from ack_in() only
if new data (a segment that has not been acknowledged before)
is getting acknowledged.
- Mani.
--
"A man is but a product of his thoughts; what he thinks, that he becomes."
- Mahatma Gandhi
____________________________________________________________________________
* Manikantan Ramadas * IRG, Ohio Univ. * http://irg.cs.ohiou.edu/~mramadas *
____________________________________________________________________________
----------------------------------------------------------------------------
To unsubscribe, send a message with body containing "unsubscribe tcptrace" to
majordomo@tcptrace.org.
This archive was generated by hypermail 2.1.7 : 06/25/03 EDT