Subject: Re: [RFT] BIC TCP delayed ack compensation

From: Hubert Tonneau <[email-masked]>
Date: Wed, 23 Feb 2005 21:54:47 GMT

Stephen Hemminger wrote:
>
> An interesting test would be to repeat the slow case: 2.6.10-ac11 over 100Mbps
> 
> With first TCP Reno (old default).
> 	sysctl -w net.ipv4.tcp_bic=0

No change.

> then TCP Westwood.
> 	sysctl -w net.ipv4.tcp_bic=0
> 	sysctl -w net.ipv4.tcp_westwood=1

No change.

Now Linux 2.6.11-rc4 with Injong Rhee abc patch:

No change.

Looks like David S. Miller is right.
Now, what I still don't understand is, if it's PSH/ACK related, why does
the gigabit connected Mac works nicely whereas the 100 Mbps connected one
does not ?