Date: Wed, 12 Feb 2014 11:52:37 -0500 From: Mike Tancsa <mike@sentex.net> To: Nikolay Denev <nike_d@cytexbg.com> Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: forwarding performance (was Re: missing missing packets in igb stats ?) Message-ID: <52FBA6D5.7010308@sentex.net> In-Reply-To: <CA%2BP_MZEZMe8Z8yJ83AQHdsM82hXTTG9rCe0OHogqRYn_PG60wg@mail.gmail.com> References: <52EC573B.109@sentex.net> <CA%2BP_MZEZMe8Z8yJ83AQHdsM82hXTTG9rCe0OHogqRYn_PG60wg@mail.gmail.com>
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On 2/2/2014 6:49 AM, Nikolay Denev wrote: > > Just a guess, but this might be happening before the driver. > Anything interesting in "netstat -s" for ip and udp? > > There is some inbound traffic on igb0. Are these ICMP udp port unreach? In that example it was. I was overwhelming the traffic sink on the other side I think. Anyways, I have managed to generate errors on the forwarding box. I setup a number of vlan interfaces and using fast boxes on the edge, I can generate errors. Now I have been trying to tweak the forwarding performance of the box as a router/firewall. The one box I am testing (igb nics) seems to max out at around 1.2Mpps kern.random.sys.harvest.ethernet=0 kern.random.sys.harvest.interrupt=0 net.inet.ip.fastforwarding=1 net.inet.ip.redirect=0 kern.random.sys.harvest.point_to_point=0 and hw.igb.max_interrupt_rate=64000 This is a Xeon E31220 @ 3.10GHz. -- ------------------- Mike Tancsa, tel +1 519 651 3400 Sentex Communications, mike@sentex.net Providing Internet services since 1994 www.sentex.net Cambridge, Ontario Canada http://www.tancsa.com/
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