On Oct 28, 2012, at 14:56, Andre Oppermann <an...@freebsd.org> wrote:
> On 28.10.2012 22:34, Rui Paulo wrote: >> On 28 Oct 2012, at 12:02, Andre Oppermann <an...@freebsd.org> wrote: >> >>> Author: andre >>> Date: Sun Oct 28 19:02:07 2012 >>> New Revision: 242261 >>> URL: http://svn.freebsd.org/changeset/base/242261 >>> >>> Log: >>> For retransmits of SYN|ACK from the syncache use the slightly more >>> aggressive special tcp_syn_backoff[] retransmit schedule instead of >>> the normal tcp_backoff[] schedule for established connections. >> >> >> How did you came up with the values for tcp_syn_backoff? I obviously > > understand the aggressiveness, but did you measure any significant > > improvement in connection establishment time and if so, on what type of > > links? > > I didn't come up with the values. tcp_syn_backoff[] was introduced > almost 12 years ago by jlemon. For syncache it got lost somewhere > along the line. Oh, I see. I read it backwards. > > There has been recent talk by some large FreeBSD web server operators > of reducing SYN|ACK retransmit timeouts. This change fixes a part of > the problem. The recent RFC on reducing the RTO will fix the other > part. Which RFC? I'm only aware of draft-hurtig-tcpm-rtorestart. _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
