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authorIlpo Järvinen <ilpo.jarvinen@helsinki.fi>2009-02-28 04:44:37 +0000
committerDavid S. Miller <davem@davemloft.net>2009-03-02 03:00:15 -0800
commit758ce5c8d11d6fc57fe5f1dbc237aa8ff6386eac (patch)
tree45b3dff5ca179712d50cdeae45846db8ffd51caa /net/ipv4/tcp_scalable.c
parent571a5dd8d01f2a7e279c502fa220a69262d73694 (diff)
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_scalable.c')
-rw-r--r--net/ipv4/tcp_scalable.c10
1 files changed, 2 insertions, 8 deletions
diff --git a/net/ipv4/tcp_scalable.c b/net/ipv4/tcp_scalable.c
index 4660b088a8ce..a76513779e2b 100644
--- a/net/ipv4/tcp_scalable.c
+++ b/net/ipv4/tcp_scalable.c
@@ -24,14 +24,8 @@ static void tcp_scalable_cong_avoid(struct sock *sk, u32 ack, u32 in_flight)
if (tp->snd_cwnd <= tp->snd_ssthresh)
tcp_slow_start(tp);
- else {
- tp->snd_cwnd_cnt++;
- if (tp->snd_cwnd_cnt > min(tp->snd_cwnd, TCP_SCALABLE_AI_CNT)){
- if (tp->snd_cwnd < tp->snd_cwnd_clamp)
- tp->snd_cwnd++;
- tp->snd_cwnd_cnt = 0;
- }
- }
+ else
+ tcp_cong_avoid_ai(tp, min(tp->snd_cwnd, TCP_SCALABLE_AI_CNT));
}
static u32 tcp_scalable_ssthresh(struct sock *sk)