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authorStephen Hemminger <shemminger@linux-foundation.org>2007-04-24 09:26:16 +0400
committerDavid S. Miller <davem@sunset.davemloft.net>2007-04-26 09:29:45 +0400
commit164891aadf1721fca4dce473bb0e0998181537c6 (patch)
tree991393ec7306da475cb306fcc7cb084f737ebadc /net/ipv4/tcp_lp.c
parent65d1b4a7e73fe0e1f5275ad7d2d3547981480886 (diff)
downloadlinux-164891aadf1721fca4dce473bb0e0998181537c6.tar.xz
[TCP]: Congestion control API update.
Do some simple changes to make congestion control API faster/cleaner. * use ktime_t rather than timeval * merge rtt sampling into existing ack callback this means one indirect call versus two per ack. * use flags bits to store options/settings Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_lp.c')
-rw-r--r--net/ipv4/tcp_lp.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/net/ipv4/tcp_lp.c b/net/ipv4/tcp_lp.c
index f0ebaf0e21cb..b4e062ab24a1 100644
--- a/net/ipv4/tcp_lp.c
+++ b/net/ipv4/tcp_lp.c
@@ -218,7 +218,7 @@ static u32 tcp_lp_owd_calculator(struct sock *sk)
* 3. calc smoothed OWD (SOWD).
* Most ideas come from the original TCP-LP implementation.
*/
-static void tcp_lp_rtt_sample(struct sock *sk, u32 usrtt)
+static void tcp_lp_rtt_sample(struct sock *sk, u32 rtt)
{
struct lp *lp = inet_csk_ca(sk);
s64 mowd = tcp_lp_owd_calculator(sk);
@@ -261,11 +261,13 @@ static void tcp_lp_rtt_sample(struct sock *sk, u32 usrtt)
* newReno in increase case.
* We work it out by following the idea from TCP-LP's paper directly
*/
-static void tcp_lp_pkts_acked(struct sock *sk, u32 num_acked)
+static void tcp_lp_pkts_acked(struct sock *sk, u32 num_acked, ktime_t last)
{
struct tcp_sock *tp = tcp_sk(sk);
struct lp *lp = inet_csk_ca(sk);
+ tcp_lp_rtt_sample(sk, ktime_to_ns(net_timedelta(last)) / NSEC_PER_USEC);
+
/* calc inference */
if (tcp_time_stamp > tp->rx_opt.rcv_tsecr)
lp->inference = 3 * (tcp_time_stamp - tp->rx_opt.rcv_tsecr);
@@ -312,11 +314,11 @@ static void tcp_lp_pkts_acked(struct sock *sk, u32 num_acked)
}
static struct tcp_congestion_ops tcp_lp = {
+ .flags = TCP_CONG_RTT_STAMP,
.init = tcp_lp_init,
.ssthresh = tcp_reno_ssthresh,
.cong_avoid = tcp_lp_cong_avoid,
.min_cwnd = tcp_reno_min_cwnd,
- .rtt_sample = tcp_lp_rtt_sample,
.pkts_acked = tcp_lp_pkts_acked,
.owner = THIS_MODULE,