commit 6c1bbf5766c410de3848fb56450d02cca103cb73
Author: Sepherosa Ziehau <[email protected]>
Date: Thu May 3 16:37:17 2012 +0800
tcp: Ignore duplicate ACK carries useless DSACK
This mainly used to avoid unnecessary early retransmit and fast
retransmit as show in the following two dumps:
http://leaf.dragonflybsd.org/~sephe/early.xpl (~4.8sec)
http://leaf.dragonflybsd.org/~sephe/fast.xpl (~12.35sec)
Summary of changes:
sys/netinet/tcp_input.c | 35 +++++++++++++++++++++++++++++++----
sys/netinet/tcp_sack.c | 19 ++++++++++++++-----
sys/netinet/tcp_var.h | 2 ++
3 files changed, 47 insertions(+), 9 deletions(-)
http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/6c1bbf5766c410de3848fb56450d02cca103cb73
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DragonFly BSD source repository
