* 2.4 kern: want to print TCP cwnd with every packet
@ 2006-05-06 14:19 George P Nychis
2006-05-08 17:31 ` Stephen Hemminger
0 siblings, 1 reply; 2+ messages in thread
From: George P Nychis @ 2006-05-06 14:19 UTC (permalink / raw)
To: netdev
Hi,
I'd like to print the TCP cwnd for the sender, with every packet before it is sent out. This way i could plot the sender window over time to show TCP's behavior in certain conditions.
I see in tcp_input.c several places where i could print the current window, but i'd have to add code in multiple places. I was wondering if there is any 1 place, right before a packet is sent out, that i could printk() tp->snd_cwnd
Thanks!
George
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: 2.4 kern: want to print TCP cwnd with every packet
2006-05-06 14:19 2.4 kern: want to print TCP cwnd with every packet George P Nychis
@ 2006-05-08 17:31 ` Stephen Hemminger
0 siblings, 0 replies; 2+ messages in thread
From: Stephen Hemminger @ 2006-05-08 17:31 UTC (permalink / raw)
To: George P Nychis; +Cc: netdev
On Sat, 6 May 2006 10:19:16 -0400 (EDT)
"George P Nychis" <gnychis@cmu.edu> wrote:
> Hi,
>
> I'd like to print the TCP cwnd for the sender, with every packet before it is sent out. This way i could plot the sender window over time to show TCP's behavior in certain conditions.
>
> I see in tcp_input.c several places where i could print the current window, but i'd have to add code in multiple places. I was wondering if there is any 1 place, right before a packet is sent out, that i could printk() tp->snd_cwnd
>
> Thanks!
> George
>
> -
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Look at http://developer.osdl.org/shemminger/prototypes/tcpprobe.tar.gz
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