From a5c684de26f4eea3aac7f164dd641b93332099be Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Wed, 27 Jun 2012 22:32:47 +0000 Subject: [PATCH] =?utf8?q?kernel:=20switch=20openwrt=20default=20to=20TCP?= =?utf8?q?=20cubic=20from=20westwood=20(patch=20by=20Dave=20T=C3=A4ht)?= MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Despite Westwood's theoretical advantages, in nearly every benchmark we ran last year, TCP cubic won, whether it be on correct RTT estimates, amount of buffering, responsiveness, etc. on current hardware and software designs. (both need timestamps on to work well, besides) TCP cubic is better maintained and understood than westwood, also. While a scenario where westwood would win possibly exists, there is too much buffering in the wifi stack in particular at present, to see any improvement. If you wish to exercise various TCPs under contention, the current svn head of netperf (2.6) has options to switch congestion control agorithms on the fly, as does iperf. SVN-Revision: 32514 --- target/linux/generic/config-3.3 | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/target/linux/generic/config-3.3 b/target/linux/generic/config-3.3 index 44968ef77c69..2ddce18c4fd9 100644 --- a/target/linux/generic/config-3.3 +++ b/target/linux/generic/config-3.3 @@ -575,8 +575,8 @@ CONFIG_DEFAULT_MMAP_MIN_ADDR=4096 # CONFIG_DEFAULT_RENO is not set CONFIG_DEFAULT_SECURITY="" CONFIG_DEFAULT_SECURITY_DAC=y -CONFIG_DEFAULT_TCP_CONG="westwood" -CONFIG_DEFAULT_WESTWOOD=y +CONFIG_DEFAULT_TCP_CONG="cubic" +CONFIG_DEFAULT_CUBIC=y CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config" # CONFIG_DEPRECATED_PARAM_STRUCT is not set # CONFIG_DETECT_HUNG_TASK is not set @@ -2876,7 +2876,7 @@ CONFIG_SYSVIPC_SYSCTL=y # CONFIG_TCIC is not set CONFIG_TCP_CONG_ADVANCED=y # CONFIG_TCP_CONG_BIC is not set -# CONFIG_TCP_CONG_CUBIC is not set +CONFIG_TCP_CONG_CUBIC=y # CONFIG_TCP_CONG_HSTCP is not set # CONFIG_TCP_CONG_HTCP is not set # CONFIG_TCP_CONG_HYBLA is not set @@ -2885,7 +2885,7 @@ CONFIG_TCP_CONG_ADVANCED=y # CONFIG_TCP_CONG_SCALABLE is not set # CONFIG_TCP_CONG_VEGAS is not set # CONFIG_TCP_CONG_VENO is not set -CONFIG_TCP_CONG_WESTWOOD=y +# CONFIG_TCP_CONG_WESTWOOD is not set # CONFIG_TCP_CONG_YEAH is not set # CONFIG_TCP_MD5SIG is not set # CONFIG_TEHUTI is not set -- 2.30.2