Date: Sun, 6 Jul 2008 00:10:05 +0200 (CEST) From: Ingo Flaschberger <if@xip.at> To: Paul <paul@gtcomm.net> Cc: FreeBSD Net <freebsd-net@freebsd.org> Subject: Re: Freebsd IP Forwarding performance (question, and some info) [7-stable, current, em, smp] Message-ID: <alpine.LFD.1.10.0807052356130.2145@filebunker.xip.at> In-Reply-To: <486E65E6.3060301@gtcomm.net> References: <4867420D.7090406@gtcomm.net> <486986D9.3000607@monkeybrains.net> <48699960.9070100@gtcomm.net> <ea7b9c170806302005n2a66f592h2127f87a0ba2c6d2@mail.gmail.com> <20080701033117.GH83626@cdnetworks.co.kr> <ea7b9c170806302050p2a3a5480t29923a4ac2d7c852@mail.gmail.com> <4869ACFC.5020205@gtcomm.net> <4869B025.9080006@gtcomm.net> <486A7E45.3030902@gtcomm.net> <486A8F24.5010000@gtcomm.net> <486A9A0E.6060308@elischer.org> <486B41D5.3060609@gtcomm.net> <alpine.LFD.1.10.0807021052041.557@filebunker.xip.at> <486B4F11.6040906@gtcomm.net> <alpine.LFD.1.10.0807021155280.557@filebunker.xip.at> <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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Dear Paul, > 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 :) yes, but I'm shure I will also not be able to achieve much more pps. As it seems that you hit hardware-software-level-barriers, my only idea is to test dragonfly bsd, which seems to have less software overhead. I don't think you will be able to route 64byte packets at 1gbit wirespeed (2Mpps) with a current x86 platform. I hoped to reach 1Mpps with the hardware I mentioned some mails before, but 2Mpps is far far away. Currently I get 160kpps via pci-32mbit-33mhz-1,2ghz mobile pentium. Perhaps you have some better luck at some different hardware systems (ppc, mips, ..?) or use freebsd only for routing-table-updates and special network-cards (netfpga) for real routing. Kind regards, Ingo Flaschberger
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