From b7d7a9e3c900f0733bf2aabdd41e6dbc70eae94b Mon Sep 17 00:00:00 2001 From: Luca De Cicco Date: Sun, 11 Jun 2006 23:01:39 -0700 Subject: [TCP] Westwood: comment fixes Cleanup some comments and add more references Signed-off-by: Luca De Cicco Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller --- net/ipv4/tcp_westwood.c | 25 +++++++++++++++++++++---- 1 file changed, 21 insertions(+), 4 deletions(-) diff --git a/net/ipv4/tcp_westwood.c b/net/ipv4/tcp_westwood.c index 62a96b71b0dd..12a2cd976e3a 100644 --- a/net/ipv4/tcp_westwood.c +++ b/net/ipv4/tcp_westwood.c @@ -1,7 +1,24 @@ /* - * TCP Westwood+ + * TCP Westwood+: end-to-end bandwidth estimation for TCP * - * Angelo Dell'Aera: TCP Westwood+ support + * Angelo Dell'Aera: author of the first version of TCP Westwood+ in Linux 2.4 + * + * Support at http://c3lab.poliba.it/index.php/Westwood + * Main references in literature: + * + * - Mascolo S, Casetti, M. Gerla et al. + * "TCP Westwood: bandwidth estimation for TCP" Proc. ACM Mobicom 2001 + * + * - A. Grieco, s. Mascolo + * "Performance evaluation of New Reno, Vegas, Westwood+ TCP" ACM Computer + * Comm. Review, 2004 + * + * - A. Dell'Aera, L. Grieco, S. Mascolo. + * "Linux 2.4 Implementation of Westwood+ TCP with Rate-Halving : + * A Performance Evaluation Over the Internet" (ICC 2004), Paris, June 2004 + * + * Westwood+ employs end-to-end bandwidth measurement to set cwnd and + * ssthresh after packet loss. The probing phase is as the original Reno. */ #include @@ -93,7 +110,7 @@ static void westwood_update_window(struct sock *sk) struct westwood *w = inet_csk_ca(sk); s32 delta = tcp_time_stamp - w->rtt_win_sx; - /* Initialise w->snd_una with the first acked sequence number in order + /* Initialize w->snd_una with the first acked sequence number in order * to fix mismatch between tp->snd_una and w->snd_una for the first * bandwidth sample */ @@ -191,7 +208,7 @@ static void tcp_westwood_event(struct sock *sk, enum tcp_ca_event event) { struct tcp_sock *tp = tcp_sk(sk); struct westwood *w = inet_csk_ca(sk); - + switch(event) { case CA_EVENT_FAST_ACK: westwood_fast_bw(sk); -- cgit v1.2.3-59-g8ed1b