[ns] thrpughtput BUG??
Thu, 18 Jan 2001 07:08:36 -0800 (PST)
--- Lloyd Wood <firstname.lastname@example.org> wrote:
> On Wed, 17 Jan 2001, Jacky Lee wrote:
> > I found that when I traced the trace file, the
> > bytes sent indicated in the trace file was
> > to [$tcp set ndatabytes_] (total bytes sent from
> > Anyone can tell me why?
> 1) Packet drops/reordering, leading to TCP resends.
I have counted the resend packets from the trace file
Moreover, after I detach the tcp agent from the node
$ns at 10 "$ns detach-agent n0 tcp0"
[$tcp set ndatabytes_] at t=11 is not equal to
[$tcp set ndatabytes_] at t=20.
> 2) Header overhead (depends on the TCP variant used;
> FullTcp simulates
> this most accurately.)
> If you snoop on data being delivered by the receiver
> sink to the
> application (I posted a simple recv() method a while
> back) you should
> see overall correspondence with ndatabytes_
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