Date: Wed, 18 Aug 2010 18:05:54 +0000 (UTC) From: Andre Oppermann <andre@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/netinet tcp_output.c tcp_var.h Message-ID: <201008181806.o7II63Hb066860@repoman.freebsd.org>
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andre 2010-08-18 18:05:54 UTC
FreeBSD src repository
Modified files:
sys/netinet tcp_output.c tcp_var.h
Log:
SVN rev 211464 on 2010-08-18 18:05:54Z by andre
If a TCP connection has been idle for one retransmit timeout or more
it must reset its congestion window back to the initial window.
RFC3390 has increased the initial window from 1 segment to up to
4 segments.
The initial window increase of RFC3390 wasn't reflected into the
restart window which remained at its original defaults of 4 segments
for local and 1 segment for all other connections. Both values are
controllable through sysctl net.inet.tcp.local_slowstart_flightsize
and net.inet.tcp.slowstart_flightsize.
The increase helps TCP's slow start algorithm to open up the congestion
window much faster.
Reviewed by: lstewart
MFC after: 1 week
Revision Changes Path
1.170 +26 -15 src/sys/netinet/tcp_output.c
1.188 +2 -0 src/sys/netinet/tcp_var.h
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