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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