From: Dave Taht <dave.t...@bufferbloat.net> 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. So this leaves westwood enabled, but no longer the default. 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. --- target/linux/generic/config-3.3 | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/target/linux/generic/config-3.3 b/target/linux/generic/config-3.3 index f98ddd6..3c4843d 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 @@ -2875,7 +2875,7 @@ 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 -- 1.7.9.5 _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
