Date: Mon, 6 Apr 2009 17:01:22 +0000 (UTC) From: "Bjoern A. Zeeb" <bz@FreeBSD.org> To: sthaug@nethelp.no Cc: freebsd-net@freebsd.org Subject: Re: IPv6 window scaling factor always 1 on initial SYN Message-ID: <20090406165933.C15361@maildrop.int.zabbadoz.net> In-Reply-To: <20090406.121959.74751582.sthaug@nethelp.no> References: <20090405.231044.74688369.sthaug@nethelp.no> <20090405214757.E15361@maildrop.int.zabbadoz.net> <20090405215842.C15361@maildrop.int.zabbadoz.net> <20090406.121959.74751582.sthaug@nethelp.no>
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On Mon, 6 Apr 2009, sthaug@nethelp.no wrote: >> Ok, both versions had: < so->so_rcv.sb_hiwat) >> >> http://svn.freebsd.org/viewvc/base?view=revision&revision=166403 >> >> changed it for IPv4 the first time, >> >> http://svn.freebsd.org/viewvc/base?view=revision&revision=172795 >> >> changed it a second time for IPv4. >> >> Noone changed the IPv6 version. >> >> The syncache already seems to do it for both v4/v6 (common code). >> >> Can you try changing it to < sb_max) for IPv6 as well and see if >> things work (better) for you? > > I changed it, and that worked like a dream. Now I get basically the > same throughput with IPv4 and IPv6. That sounds great! :-) > There are of course still issues > like lots of IPv6 tunnels that add extra latency - but that's not the > fault of FreeBSD. > Anyway, thanks for your work. Below is a context diff (against 7-STABLE > cvsupped last night). Do we need a PR to get this into FreeBSD? No, not even the context diff would have been needed;-) I'll commit it as soon as I find a few quiet minutes and a src tree;-) /bz -- Bjoern A. Zeeb The greatest risk is not taking one.
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