Corrections inline. I blame beer.
-- Jim > On Oct 18, 2014, at 1:21 AM, Jim Thompson <j...@netgate.com> wrote: > > So, > > The only people getting a google fiber connection *today* live in Provo, UT > or Kansas City. > > Google Funer Fiber. > is being built out in Austin, but won't be available until early 2015. My > neighborhood will get it in the second pass, but I have a Grande 1Gbps/1Gbps > connection to my house today, and Grande terminates in the data center next > to pfSense World HQ. (We have a 10Gbps fiber connection to our cabinet there.) > > So I have a <10ms RTT 1Gbps path from home to work, today. In the next > couple months, I'll have two. :-) > > Neither pfSense or FreeBSD will forward at 1.488Mpps on a C2758 today, but > running the l3fwd app from DPDK on a 2 8 > core C2758 CPU fitted with a dual port 10Gbps card will run at 14.88Mpps. > > https://github.com/Pktgen/Pktgen-DPDK/tree/master/dpdk/examples/l3fwd > > (And it's trivial to make 1.488 happen in the igb ports. Don't go there.) > > A simple bridge over netmap will yield the same result. (With pkt-gen running > on either side.) > > So the problem is not (as you assert) in the hardware, but rather, in the > FreeBSD (and, honestly Linux too) stack(s). > > But I've already explained that we're working on it. > > -- Jim > >> On Oct 17, 2014, at 5:54 PM, compdoc <comp...@hotrodpc.com> wrote: >> >> I wanted to add one more thing. Maybe this will help avoid future >> misunderstandings... >> >> Ulrik Lunddahl asked: >> > "Will A SMB without L3 capable switches, that needs routing between 3-4 >> > local subnets (LAN, SERVERS, WIRELESS/GUEST, OTHER/DMZ) as close to >> > wirespeed as possible, be happy with a C2758. ?" >> >> Now, I realize that the vast majority of users and businesses in the world >> don’t need a wirespeed router, and they have no idea what one is. Their >> internet connections just aren't fast enough to require one, and they don’t >> use them internally. >> >> The fact that Ulrik was asking this question means that he not only knows >> what one is, but he has a specific requirement. >> >> I've seen others asking this same question on IRC but with a different >> requirement: they were getting Google Fiber connections and they knew enough >> to want a server powerful enough to take full advantage of the connection. >> One guy I saw chose a system with fairly expensive dual Xeon cpus. I thought >> he was crazy. >> >> Their questions made me curious, and I decided to see just which hardware I >> had on hand could reach gigabit line-rates. (pkt-gen measures this bandwidth >> as 714.23 Mbps (raw 999.92 Mbps), at 1.488Mpps) >> >> I was surprised at the results. Nics connected to the PCI bus were dogs. >> Nics connected to the PCI-e bus were lots faster, and some could reach >> 1.488Mpps. Also, nics with 4 pci-e lanes were faster than nics with 1 pci-e >> lane. >> >> Furthermore, I found that to forward packets at 1.488Mpps requires not only >> a fast NIC, but also a cpu that was capable of pushing traffic through that >> fast. >> >> The only cpus I had on hand there were capable, was an Intel i5, and a newly >> released Amd Kaveri APU. (with Steamroller cores) >> >> Anyway, Ulrik asked if he'd be happy with a C2758, and I had read on the >> BSD-RP site that the C2758 board they were testing wasn’t capable of >> 1.488Mpps. It was about half that, even though it had Intel based nics. >> >> And while that’s still blazing fast, I felt it might not be fast enough for >> the knowledgeable people asking these questions. >> >> It would be a shame for anyone to buy something so expensive and expecting >> certain results, and not getting them. >> >> Even a cheap 5 port gigabit switch can forward traffic at 1.488Mpps, so if >> the devices sold by pfSense and elsewhere are capable of full wirespeed, >> then those devices would be an excellent buy. >> >> More so, because of the tuned software and support they'd be getting along >> with it. >> >> compdoc >> >> _______________________________________________ >> List mailing list >> List@lists.pfsense.org >> https://lists.pfsense.org/mailman/listinfo/list > _______________________________________________ > List mailing list > List@lists.pfsense.org > https://lists.pfsense.org/mailman/listinfo/list
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