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authorIlpo Järvinen <ilpo.jarvinen@helsinki.fi>2009-02-28 07:44:37 +0300
committerDavid S. Miller <davem@davemloft.net>2009-03-02 14:00:15 +0300
commit758ce5c8d11d6fc57fe5f1dbc237aa8ff6386eac (patch)
tree45b3dff5ca179712d50cdeae45846db8ffd51caa /net/ipv4/tcp_bic.c
parent571a5dd8d01f2a7e279c502fa220a69262d73694 (diff)
downloadlinux-758ce5c8d11d6fc57fe5f1dbc237aa8ff6386eac.tar.xz
tcp: add helper for AI algorithm
It seems that implementation in yeah was inconsistent to what other did as it would increase cwnd one ack earlier than the others do. Size benefits: bictcp_cong_avoid | -36 tcp_cong_avoid_ai | +52 bictcp_cong_avoid | -34 tcp_scalable_cong_avoid | -36 tcp_veno_cong_avoid | -12 tcp_yeah_cong_avoid | -38 = -104 bytes total Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_bic.c')
-rw-r--r--net/ipv4/tcp_bic.c11
1 files changed, 1 insertions, 10 deletions
diff --git a/net/ipv4/tcp_bic.c b/net/ipv4/tcp_bic.c
index 7eb7636db0d0..3b53fd1af23f 100644
--- a/net/ipv4/tcp_bic.c
+++ b/net/ipv4/tcp_bic.c
@@ -149,16 +149,7 @@ static void bictcp_cong_avoid(struct sock *sk, u32 ack, u32 in_flight)
tcp_slow_start(tp);
else {
bictcp_update(ca, tp->snd_cwnd);
-
- /* In dangerous area, increase slowly.
- * In theory this is tp->snd_cwnd += 1 / tp->snd_cwnd
- */
- if (tp->snd_cwnd_cnt >= ca->cnt) {
- if (tp->snd_cwnd < tp->snd_cwnd_clamp)
- tp->snd_cwnd++;
- tp->snd_cwnd_cnt = 0;
- } else
- tp->snd_cwnd_cnt++;
+ tcp_cong_avoid_ai(tp, ca->cnt);
}
}