Date: Tue, 24 Jun 2003 17:01:55 -0700 From: Shawn Ramsey <shawn@cpl.net> To: Karl Pielorz <kpielorz@tdx.co.uk> Cc: freebsd-questions@freebsd.org Subject: Re: Network Performace Message-ID: <20030624170155.A46097@cpl.net> In-Reply-To: <512328439.1056443294@Study.tdx.com>; from kpielorz@tdx.co.uk on Tue, Jun 24, 2003 at 08:28:14AM %2B0100 References: <009701c339ed$b89daf40$85dd75d8@shawn> <512328439.1056443294@Study.tdx.com>
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> > with unused USB and onboard NIC which is also not used. Should I be able > > to push more than 100Mb sec with such a system? It is not doing anything > > else, no NAT, one IPFW rule. OS is FreeBSD 4.7-RELEASE. > > All depends how big the packets are etc. - 90% interrupt time is fairly > typical of x86/PC kit shoveling lots of small packets. > > Try looking into FreeBSD's "polling" mode - i.e. interrupt free Network > cards. If your shifting a lot of small packets (such as online gaming stuff > etc.) - you may find your milage pretty limited using standard PC kit - as > the x86 architecture wasn't really designed for shifting lots of small > packets around [as I've seen many a time in the past :(] This router is routing 99% NNTP traffic, so I wouldn't think small packet size would be it. I tried polling, and its greatly increased the amount of "idle CPU", and Interupt is around 20% now... But something is still very wrong performance wise. It has helped, but I still can't push in/out nearly 100Mb/sec. (100Mb in, 100Mb out I mean). A simple FTP transfer locally through the routers gigabit interface causes our internet performance to plummet. I've disabled all the onboard stuff that was sharing IRQs with PCI cards, but I didn't figure that was an issue, didn't make a difference either way. Would the fact the gigabit is on the same PCI bus have any bearing? I would expect to at least get 100BT performance even so, but I don't have any experience with gigabit ethernet...
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