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| author | Stephen Hemminger <shemminger@linux-foundation.org> | 2007-04-23 22:26:16 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-04-25 22:29:45 -0700 |
| commit | 164891aadf1721fca4dce473bb0e0998181537c6 (patch) | |
| tree | 991393ec7306da475cb306fcc7cb084f737ebadc /net/ipv4/tcp_vegas.c | |
| parent | 65d1b4a7e73fe0e1f5275ad7d2d3547981480886 (diff) | |
| download | linux-164891aadf1721fca4dce473bb0e0998181537c6.tar.gz linux-164891aadf1721fca4dce473bb0e0998181537c6.tar.bz2 linux-164891aadf1721fca4dce473bb0e0998181537c6.zip | |
[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_vegas.c')
| -rw-r--r-- | net/ipv4/tcp_vegas.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/net/ipv4/tcp_vegas.c b/net/ipv4/tcp_vegas.c index 87e72bef6d08..f4104eeb5f26 100644 --- a/net/ipv4/tcp_vegas.c +++ b/net/ipv4/tcp_vegas.c @@ -120,10 +120,13 @@ static void tcp_vegas_init(struct sock *sk) * o min-filter RTT samples from a much longer window (forever for now) * to find the propagation delay (baseRTT) */ -static void tcp_vegas_rtt_calc(struct sock *sk, u32 usrtt) +static void tcp_vegas_pkts_acked(struct sock *sk, u32 cnt, ktime_t last) { struct vegas *vegas = inet_csk_ca(sk); - u32 vrtt = usrtt + 1; /* Never allow zero rtt or baseRTT */ + u32 vrtt; + + /* Never allow zero rtt or baseRTT */ + vrtt = (ktime_to_ns(net_timedelta(last)) / NSEC_PER_USEC) + 1; /* Filter to find propagation delay: */ if (vrtt < vegas->baseRTT) @@ -353,11 +356,12 @@ static void tcp_vegas_get_info(struct sock *sk, u32 ext, } static struct tcp_congestion_ops tcp_vegas = { + .flags = TCP_CONG_RTT_STAMP, .init = tcp_vegas_init, .ssthresh = tcp_reno_ssthresh, .cong_avoid = tcp_vegas_cong_avoid, .min_cwnd = tcp_reno_min_cwnd, - .rtt_sample = tcp_vegas_rtt_calc, + .pkts_acked = tcp_vegas_pkts_acked, .set_state = tcp_vegas_state, .cwnd_event = tcp_vegas_cwnd_event, .get_info = tcp_vegas_get_info, |