Date: Tue, 26 Feb 2008 01:43:16 +0100 (CET) From: Ingo Flaschberger <if@xip.at> To: Kevin Oberman <oberman@es.net> Cc: =?ISO-8859-15?Q?Daniel_Dias_Gon=E7alves?= <daniel@dgnetwork.com.br>, freebsd-net@freebsd.org, freebsd-performance@freebsd.org Subject: Re: FBSD 1GBit router? Message-ID: <alpine.LFD.1.00.0802260132240.9719@filebunker.xip.at> In-Reply-To: <20080226003107.54CD94500E@ptavv.es.net> References: <20080226003107.54CD94500E@ptavv.es.net>
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Dear Kevin, >>>> I upgrade to 7.0RC3 but still the same. 418Mbit is the roof. >> >> older fbsd's are faster than newer. >> >> How are the nic's connected to the cpu? >> >> lspci -v > > V7 is not (in my experience) slower than V4, v5, or v6. v6 is at least slower than v4. http://www.tancsa.com/blast.html (look at the table at the end) > I have run a lot > of tests at speeds MUCH higher than 1Gb. With 10Gb cards, I can sustain > transfer rates of over 9Gbps (assuming low RTT and suitable > hardware). 1Gbps is not even a challenge...even over a 100 ms. RTT. You can route 9Gbps - or only source or sink 9gbps? What packet size? Whats the maximum pps (with 64byte packets)? (Thats the real interesting value, not mbps) I have a 1.2Ghz Pentium-M appliance, with 4x 32bit, 33MHz pci intel e1000 cards. With maximum tuning I can "route" ~400mbps with big packets and ~80mbps with 64byte packets. around 100kpps, whats not bad for a pci architecture. To reach higher bandwiths, better busses are needed. pci-express cards are currently the best choice. one dedicated pci-express lane (1.25gbps) has more bandwith than a whole 32bit, 33mhz pci-bus. > Note that high throughput may require some tuning. Transmit and receive > windows need to be rather large if the RTT is very long at all. (See > "bandwidth-delay product" in Stevens or some other TCP reference.) I'm not shure if he's using the nic for a server or for a router? Kind regards, Ingo Flaschberger
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