Date: Wed, 21 Apr 2010 11:13:53 -0700 From: Jack Vogel <jfvogel@gmail.com> To: Brandon Gooch <jamesbrandongooch@gmail.com> Cc: freebsd-performance@freebsd.org, Stephen Sanders <ssanders@softhammer.net> Subject: Re: FreeBSD 8.0 ixgbe Poor Performance Message-ID: <x2j2a41acea1004211113kf8e4de95s9ff5c1669156b82c@mail.gmail.com> In-Reply-To: <y2y179b97fb1004210804s6ca12944qf194f3a6d8c33cfe@mail.gmail.com> References: <4BCF0C9A.10005@softhammer.net> <y2y179b97fb1004210804s6ca12944qf194f3a6d8c33cfe@mail.gmail.com>
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When you get into the 10G world your performance will only be as good as your weakest link, what I mean is if you connect to something that has less than stellar bus and/or memory performance it is going to throttle everything. Running back to back with two good systems you should be able to get near line rate (9K range). Things that can effect that: 64 bit kernel, TSO, LRO, how many queues come to mind. The default driver config should get you there, so tell me more about your hardware/os config?? Jack On Wed, Apr 21, 2010 at 8:04 AM, Brandon Gooch <jamesbrandongooch@gmail.com>wrote: > On Wed, Apr 21, 2010 at 9:32 AM, Stephen Sanders > <ssanders@softhammer.net> wrote: > > I am running speed tests on a pair of systems equipped with Intel 10Gbps > > cards and am getting poor performance. > > > > iperf and tcpdump testing indicates that the card is running at roughly > > 2.5Gbps max transmit/receive. > > > > My attempts at turning fiddling with netisr, polling, and varying the > > buffer sizes has been fruitless. I'm sure there is something that I'm > > missing so I'm hoping for suggestions. > > > > There are two systems that are connected head to head via cross over > > cable. The two systems have the same hardware configuration. The > > hardware is as follows: > > > > 2 Intel E5430 (Quad core) @ 2.66 Ghz > > Intel S5000PAL Motherboard > > 16GB Memory > > > > My iperf command line for the client is: > > > > iperf -t 10 -c 169.0.0.1 -w 2.5M -l 2.5M > > > > My TCP dump test command lines are: > > > > tcpdump -i ix0 -w/dev/null > > tcpreplay -i ix0 -t -l 0 -K ./test.pcap > > If you're running 8.0-RELEASE, you might try updating to 8-STABLE. > Jack Vogel recently committed updated Intel NIC driver code: > > http://svn.freebsd.org/viewvc/base/stable/8/sys/dev/ixgbe/ > > -Brandon > _______________________________________________ > freebsd-performance@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-performance > To unsubscribe, send any mail to " > freebsd-performance-unsubscribe@freebsd.org" >
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