Subject: Re: tcp bw in 2.6

From: Wayne Scott <[email-masked]>
Date: Tue, 02 Oct 2007 16:42:23 -0400 (EDT)

From: [email-masked] (Larry McVoy)
> Wayne, Linus asked for tcp dumps from just one side, with the first 100
> packets and then wait 10 seconds or so for the window to open up, and then
> a snap shot of the another 100 packets.  Do that for both directions
> and send them to the list.  Can you do that?  I want to get lunch, I'm
> starving.

OK attached are 4 raw tcpdumps of 1000 packets each.  One from the
start and one from steady state.

The slow set was done like this:

 on ia64:  netcat -l -p8888 > /dev/null
 on work:  netcat ia64 8888 < /dev/zero

 the traces were done of work with slow1 started right before the
 netcat on work was exectued.  And slow2 started after it acheved
 steady state at 18MB/s.

The fast set was done like this:

 on work:  netcat -l -p8888 > /dev/null
 on ia64:  netcat ia64 8888 < /dev/zero

 the traces were done of work with fast1 started right before the
 netcat on ia64 was exectued.  And fast2 started after it acheved
 steady state at 42MB/s.

-Wayne