Date: Sat, 28 Jun 2003 16:57:45 -0700 From: "Craig Reyenga" <craig@craig.afraid.org> To: "David Gilbert" <dgilbert@velocet.ca> Cc: freebsd-performance@freebsd.org Subject: Re: Tuning Gigabit Message-ID: <000901c33dd1$12268780$0200000a@fireball> References: <20030628190036.0E06B37B405@hub.freebsd.org> <000f01c33dad$1595a0f0$e602a8c0@flatline> <16126.9805.829406.368426@canoe.velocet.net>
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From: "David Gilbert" <dgilbert@velocet.ca> > >>>>> "Ivan" == Ivan Voras <ivoras@fer.hr> writes: > > >> Message: 5 Date: Sat, 28 Jun 2003 13:43:46 +0200 From: "Simon > >> L. Nielsen" <simon@nitro.dk> Subject: Re: Tuning Ggiabit > >> Message-ID: <20030628114342.GB401@nitro.dk> Content-Type: > >> text/plain; charset="us-ascii" > > >>> I've been trying to get my gigabit link to run as fast as > >>> possible, but I have run out of ideas. I've documented (though not > >>> very well) what I have done thus far: > >>> > >>> http://craig.afraid.org/a/b?page=computer/gigabit > >>> > >>> If there is any more I can do besides what I have already done, I > >>> would love to hear it. Please avoid suggestions that require > >>> spending money. > > Ivan> This is probably an obsolete suggestion, but have you increased > Ivan> HZ when you turned on NIC polling? (the web page doesn't mention > Ivan> it) > > Unfortunately you may have a motherboard that maxes at 300 megabit. > Our recent testing of Gigabit NICs found more than 75% of the > motherboards we tried unable to pass more than 500 megabit and 25% of > the motherboards wouldn't pass more than 100 megabit. > > 300 megabit is about where 32bit 33Mhz PCI maxes out. > > Dave. > > -- Could you tell me a little more about your tests? What boards, and what configuration? -Craig > ============================================================================ > |David Gilbert, Velocet Communications. | Two things can only be | > |Mail: dgilbert@velocet.net | equal if and only if they | > |http://daveg.ca | are precisely opposite. | > =========================================================GLO================
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