Date: Sat, 25 Nov 2006 15:31:51 -0600 From: "Jeremy Messenger" <mezz7@cox.net> To: "Andre Oppermann" <andre@freebsd.org> Cc: freebsd-net@freebsd.org, freebsd-current@freebsd.org Subject: Re: Automatic TCP send socker buffer sizing Message-ID: <op.tjlcrdsx9aq2h7@mezz.mezzweb.com> In-Reply-To: <455DC0F4.1070309@freebsd.org> References: <455CB311.8040301@freebsd.org> <455DC0F4.1070309@freebsd.org>
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On Fri, 17 Nov 2006 08:02:28 -0600, Andre Oppermann <andre@freebsd.org> = = wrote: > Andre Oppermann wrote: >> With automatic TCP send socket buffers we can start with a small buff= er >> and quickly grow it in parallel with the TCP congestion window to mat= ch >> real network conditions. > > >> The patch is available here: >> http://people.freebsd.org/~andre/tcp_auto_sndbuf-20061116.diff >> Any testers, especially with busy FTP servers, are very welcome. > > A RELENG_6 version (for FreeBSD 6.x) of the patch is here: > > http://people.freebsd.org/~andre/tcp_auto_sndbuf-20061116-RELENG_6.d= iff > > Just apply this patch and recompile your kernel. It is activated by = > default. > Be aware that all socket buffer sizing events get logged to syslog und= er > LOG_DEBUG. This may affect overall system performance and you may wan= t = > to > disable logging to disk of this in syslogd.conf. Is this relate with net.inet.tcp.sendspace? I reset my sysctl config bac= k = to default that was for wine+utorrent, so tested with wine+utorrent on = today (Nov 25th) RELENG_6 and works fine so far. [...] Nov 25 14:35:22 mezz kernel: tcp_output: inc sockbuf, old 65612, new = 73804, sb_cc 58553, snd_wnd 149760, sendwnd 36719 Nov 25 14:35:27 mezz kernel: tcp_output: inc sockbuf, old 73804, new = 81996, sb_cc 65608, snd_wnd 148896, sendwnd 38283 Nov 25 14:35:27 mezz kernel: tcp_output: inc sockbuf, old 81996, new = 90188, sb_cc 72604, snd_wnd 148896, sendwnd 38283 Nov 25 14:35:29 mezz kernel: tcp_output: inc sockbuf, old 90188, new = 98380, sb_cc 79093, snd_wnd 149760, sendwnd 39988 [...goes on...] A bit off point, I have to setup this below in sysctl to get wine+utorre= nt = download/upload very fast and ustable without hog the CPU. kern.ipc.maxsockbuf=3D2097152 net.inet.tcp.recvspace=3D262144 net.inet.tcp.sendspace=3D262144 Cheers, Mezz -- = mezz7@cox.net - mezz@FreeBSD.org FreeBSD GNOME Team - FreeBSD Multimedia Hat (ports, not src) http://www.FreeBSD.org/gnome/ - gnome@FreeBSD.org http://wiki.freebsd.org/multimedia - multimedia@FreeBSD.org
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