Date: Sun, 6 Jul 2008 17:10:00 +0800 From: "Sepherosa Ziehau" <sepherosa@gmail.com> To: Paul <paul@gtcomm.net> Cc: FreeBSD Net <freebsd-net@freebsd.org>, Ingo Flaschberger <if@xip.at> Subject: Re: Freebsd IP Forwarding performance (question, and some info) [7-stable, current, em, smp] Message-ID: <ea7b9c170807060209t46ce883bybee8a67a150486d9@mail.gmail.com> In-Reply-To: <486E65E6.3060301@gtcomm.net> References: <4867420D.7090406@gtcomm.net> <486BC7F5.5070604@gtcomm.net> <20080703160540.W6369@delplex.bde.org> <486C7F93.7010308@gtcomm.net> <20080703195521.O6973@delplex.bde.org> <486D35A0.4000302@gtcomm.net> <alpine.LFD.1.10.0807041106591.19613@filebunker.xip.at> <486DF1A3.9000409@gtcomm.net> <alpine.LFD.1.10.0807041303490.20760@filebunker.xip.at> <486E65E6.3060301@gtcomm.net>
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On Sat, Jul 5, 2008 at 2:03 AM, Paul <paul@gtcomm.net> wrote: > I tried all of this :/ still, 256/512 descriptors seem to work the best. > Happy to let you log into the machine and fiddle around if you want :) I think you need to ktr the packet processing time. Standard gigabit max at ~1488095pps, which means you could be @max rate only if each packet's processing time is <= ~672ns. Since you are using fastforwarding, the calculation should be quite straightforward for you; I don't think you should expect anything beyond the calculated result. Best Regards, sephe -- Live Free or Die
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