From: Stephen Hemminger <shemminger@vyatta.com>
To: "David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org, Sangtae Ha <sangtae.ha@gmail.com>
Subject: [PATCH 6/7] tcp_cubic: make the delay threshold of HyStart less sensitive
Date: Mon, 14 Mar 2011 10:52:17 -0700 [thread overview]
Message-ID: <20110314175439.750357121@vyatta.com> (raw)
In-Reply-To: 20110314175211.788224699@vyatta.com
[-- Attachment #1: tcp-cubic-increase-delay.patch --]
[-- Type: text/plain, Size: 795 bytes --]
From: Sangtae Ha <sangtae.ha@gmail.com>
Make HyStart less sensitive to abrupt delay variations due to buffer bloat.
Signed-off-by: Sangtae Ha <sangtae.ha@gmail.com>
Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Reported-by: Lucas Nussbaum <lucas.nussbaum@loria.fr>
---
net/ipv4/tcp_cubic.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
--- a/net/ipv4/tcp_cubic.c 2011-03-14 08:27:24.435852847 -0700
+++ b/net/ipv4/tcp_cubic.c 2011-03-14 08:27:29.043872578 -0700
@@ -39,7 +39,7 @@
/* Number of delay samples for detecting the increase of delay */
#define HYSTART_MIN_SAMPLES 8
-#define HYSTART_DELAY_MIN (2U<<3)
+#define HYSTART_DELAY_MIN (4U<<3)
#define HYSTART_DELAY_MAX (16U<<3)
#define HYSTART_DELAY_THRESH(x) clamp(x, HYSTART_DELAY_MIN, HYSTART_DELAY_MAX)
next prev parent reply other threads:[~2011-03-14 18:02 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-14 17:52 [PATCH 0/7] TCP CUBIC Hystart fixes Stephen Hemminger
2011-03-14 17:52 ` [PATCH 1/7] tcp: fix RTT for quick packets in congestion control Stephen Hemminger
2011-03-14 17:52 ` [PATCH 2/7] tcp_cubic: fix comparison of jiffies Stephen Hemminger
2011-03-14 17:52 ` [PATCH 3/7] tcp_cubic: make ack train delta value a parameter Stephen Hemminger
2011-03-14 17:52 ` [PATCH 4/7] tcp_cubic: fix clock dependency Stephen Hemminger
2011-03-14 18:51 ` Eric Dumazet
2011-03-14 21:21 ` Stephen Hemminger
2011-03-14 21:37 ` Eric Dumazet
2011-03-14 17:52 ` [PATCH 5/7] tcp_cubic: enable high resolution ack time if needed Stephen Hemminger
2011-03-14 17:52 ` Stephen Hemminger [this message]
2011-03-14 17:52 ` [PATCH 7/7] tcp_cubic: fix low utilization of CUBIC with HyStart Stephen Hemminger
2011-03-14 22:58 ` [PATCH 0/7] TCP CUBIC Hystart fixes David Miller
2011-03-22 11:34 ` Lucas Nussbaum
2011-03-22 11:35 ` Lucas Nussbaum
2011-03-22 12:05 ` David Miller
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