Date: Wed, 25 Jun 2003 09:16:21 +0100 From: Karl Pielorz <kpielorz@tdx.co.uk> To: Shawn Ramsey <shawn@cpl.net> Cc: freebsd-questions@freebsd.org Subject: Re: Network Performace Message-ID: <57377156.1056532581@raptor> In-Reply-To: <20030624170155.A46097@cpl.net> References: <009701c339ed$b89daf40$85dd75d8@shawn> <512328439.1056443294@Study.tdx.com> <20030624170155.A46097@cpl.net>
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--On 24 June 2003 17:01 -0700 Shawn Ramsey <shawn@cpl.net> wrote: >> 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... That's certainly a step in the right direction :) > 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... The only thing I can suggest is try different PCI slots, or Gigabit cards, or, worst case a different system. Having NIC's on separate PCI busses (as opposed to both on the same PCI bus) may help it [But that's probably going to need a new board etc.] You don't say what Gigabit nic's your using? - I've had a lot of varied results with different nic's, with surprisingly cheap 10/100/1000Mbit cards giving 'reasonable' performance - but get left standing for dust by other more expensive cards. The only other thing I can think of is, check the duplex/media options are all setup properly on the cards / switches etc. - or try forcing things to fdx etc. -Kp
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