Date: Thu, 1 Jul 2010 22:32:37 -0700 From: Garrett Cooper <yanefbsd@gmail.com> To: Aleksandr A Babaylov <.@babolo.ru> Cc: Pyun YongHyeon <pyunyh@gmail.com>, net@freebsd.org Subject: Re: Poor performance with natd/ipfw and TSO enabled on bce(4) card and 8.1-PRERELEASE Message-ID: <AANLkTinJPvYJcKihX8rXAsoBilAbiornPwdYcn81glAW@mail.gmail.com> In-Reply-To: <20100702022058.GA32531@babolo.ru> References: <AANLkTinuucNtKqWscZ9IDjws-NiNcHpKrMElLgd7Sb8r@mail.gmail.com> <20100701235447.GJ7090@michelle.cdnetworks.com> <20100702022058.GA32531@babolo.ru>
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On Thu, Jul 1, 2010 at 7:20 PM, Aleksandr A Babaylov <.@babolo.ru> wrote: > On Thu, Jul 01, 2010 at 04:54:47PM -0700, Pyun YongHyeon wrote: >> On Wed, Jun 30, 2010 at 07:00:53PM -0700, Garrett Cooper wrote: >> > Hi, >> > =A0 =A0 Just an observation I made while transferring a file: >> > >> > # time scp floppy.img somehost: >> > Password: >> > floppy.img =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0= =A0 =A0 =A0100% 1440KB =A013.7KB/s =A0 01:45 >> > >> > real =A0 =A0 =A0 =A01m59.400s >> > user =A0 =A0 =A0 =A00m0.031s >> > sys 0m0.028s >> > # sysctl net.inet.tcp.tso=3D0 >> > net.inet.tcp.tso: 1 -> 0 >> > # time scp floppy.img somehost: >> > floppy.img =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0= =A0 =A0 =A0100% 1440KB =A0 1.4MB/s =A0 00:00 >> > >> > real =A0 =A0 =A0 =A00m0.712s >> > user =A0 =A0 =A0 =A00m0.018s >> > sys 0m0.018s >> > >> > =A0 =A0 Going ISDN speeds transferring a 1.44MB file is sad when you h= ave >> > a gigabit uplink :(... natd seems to be doing a LOT of spinning when >> > TSO is enabled (it's going up to 73% CPU on a dual-proc quad-core >> > machine). >> I would use pf(4) if I have to handle lots of NAT rules. > Or ipfw nat. > man ipfw | grep nat That uses the kernel module though, and that's horribly broken on my machine with 8-STABLE/9-CURRENT (see: http://www.mail-archive.com/freebsd-net@freebsd.org/msg33518.html ). I wonder if that's related to the TSO issue. Thanks! -Garrett
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