* [PATCH 1/3] tcp_cubic: fix train length comparision
@ 2011-03-14 0:03 Sangtae Ha
0 siblings, 0 replies; only message in thread
From: Sangtae Ha @ 2011-03-14 0:03 UTC (permalink / raw)
To: Lucas Nussbaum
Cc: Stephen Hemminger, David Miller, Injong Rhee, Bill Fink, netdev,
Sangtae Ha
HyStart detects the safe exit point when the ACK train length is
larger than the one-way delay. This needs to be applied after
the patches Stephen made to fix clock dependency of HyStart.
Signed-off-by: Sangtae Ha <sangtae.ha@gmail.com>
---
net/ipv4/tcp_cubic.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/net/ipv4/tcp_cubic.c b/net/ipv4/tcp_cubic.c
index 91ef5e6..ab9f888 100644
--- a/net/ipv4/tcp_cubic.c
+++ b/net/ipv4/tcp_cubic.c
@@ -356,7 +356,7 @@ static void hystart_update(struct sock *sk, u32 delay)
/* first detection parameter - ack-train detection */
if ((s32)(now - ca->last_ack) <= hystart_ack_delta) {
ca->last_ack = now;
- if ((s32)(now - ca->round_start) <= ca->delay_min >> 4)
+ if ((s32)(now - ca->round_start) > ca->delay_min >> 4)
ca->found |= HYSTART_ACK_TRAIN;
}
--
1.7.0.4
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