diff options
| author |   Stephen Hemminger <shemminger@osdl.org> | 2005-11-10 17:07:24 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2005-11-10 17:07:24 -0800 |
| commit | 7faffa1c7fb9b8e8917e3225d4e2638270c0a48b (patch) | |
| tree | 3c9f998639bc2374a86b1f2251ae421e625c1e9d /net/ipv4/tcp_htcp.c | |
| parent | [TCP]: simplify microsecond rtt sampling (diff) | |
| download | linux-dev-7faffa1c7fb9b8e8917e3225d4e2638270c0a48b.tar.xz linux-dev-7faffa1c7fb9b8e8917e3225d4e2638270c0a48b.zip | |
[TCP]: add tcp_slow_start helper
Move all the code that does linear TCP slowstart to one
inline function to ease later patch to add ABC support.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_htcp.c')
| -rw-r--r-- | net/ipv4/tcp_htcp.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/net/ipv4/tcp_htcp.c b/net/ipv4/tcp_htcp.c index 404a326ba345..3284cfb993e6 100644 --- a/net/ipv4/tcp_htcp.c +++ b/net/ipv4/tcp_htcp.c @@ -210,11 +210,10 @@ static void htcp_cong_avoid(struct sock *sk, u32 ack, u32 rtt, if (!tcp_is_cwnd_limited(sk, in_flight)) return; - if (tp->snd_cwnd <= tp->snd_ssthresh) { - /* In "safe" area, increase. */ - if (tp->snd_cwnd < tp->snd_cwnd_clamp) - tp->snd_cwnd++; - } else { + if (tp->snd_cwnd <= tp->snd_ssthresh) + tcp_slow_start(tp); + else { + measure_rtt(sk); /* keep track of number of round-trip times since last backoff event */ @@ -224,7 +223,7 @@ static void htcp_cong_avoid(struct sock *sk, u32 ack, u32 rtt, htcp_alpha_update(ca); } - /* In dangerous area, increase slowly. + /* In dangerous area, increase slowly. * In theory this is tp->snd_cwnd += alpha / tp->snd_cwnd */ if ((tp->snd_cwnd_cnt++ * ca->alpha)>>7 >= tp->snd_cwnd) { |