From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Hemminger Subject: [PATCH 6/7] tcp_cubic: make the delay threshold of HyStart less sensitive Date: Mon, 14 Mar 2011 10:52:17 -0700 Message-ID: <20110314175439.750357121@vyatta.com> References: <20110314175211.788224699@vyatta.com> Cc: netdev@vger.kernel.org, Sangtae Ha To: "David S. Miller" Return-path: Received: from suva.vyatta.com ([76.74.103.44]:58254 "EHLO suva.vyatta.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756978Ab1CNSCE (ORCPT ); Mon, 14 Mar 2011 14:02:04 -0400 Content-Disposition: inline; filename=tcp-cubic-increase-delay.patch Sender: netdev-owner@vger.kernel.org List-ID: From: Sangtae Ha Make HyStart less sensitive to abrupt delay variations due to buffer bloat. Signed-off-by: Sangtae Ha Acked-by: Stephen Hemminger Reported-by: Lucas Nussbaum --- 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)