Date: Fri, 2 Jul 2010 06:20:58 +0400 From: Aleksandr A Babaylov <.@babolo.ru> To: Pyun YongHyeon <pyunyh@gmail.com> Cc: Garrett Cooper <yanefbsd@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: <20100702022058.GA32531@babolo.ru> In-Reply-To: <20100701235447.GJ7090@michelle.cdnetworks.com> References: <AANLkTinuucNtKqWscZ9IDjws-NiNcHpKrMElLgd7Sb8r@mail.gmail.com> <20100701235447.GJ7090@michelle.cdnetworks.com>
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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, > > Just an observation I made while transferring a file: > > > > # time scp floppy.img somehost: > > Password: > > floppy.img 100% 1440KB 13.7KB/s 01:45 > > > > real 1m59.400s > > user 0m0.031s > > sys 0m0.028s > > # sysctl net.inet.tcp.tso=0 > > net.inet.tcp.tso: 1 -> 0 > > # time scp floppy.img somehost: > > floppy.img 100% 1440KB 1.4MB/s 00:00 > > > > real 0m0.712s > > user 0m0.018s > > sys 0m0.018s > > > > Going ISDN speeds transferring a 1.44MB file is sad when you have > > 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
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