Date: Wed, 21 Apr 2010 15:52:35 -0400 From: Stephen Sanders <ssanders@softhammer.net> To: Jack Vogel <jfvogel@gmail.com> Cc: Brandon Gooch <jamesbrandongooch@gmail.com>, freebsd-performance@freebsd.org Subject: Re: FreeBSD 8.0 ixgbe Poor Performance Message-ID: <4BCF5783.9050007@softhammer.net> In-Reply-To: <x2j2a41acea1004211113kf8e4de95s9ff5c1669156b82c@mail.gmail.com> References: <4BCF0C9A.10005@softhammer.net> <y2y179b97fb1004210804s6ca12944qf194f3a6d8c33cfe@mail.gmail.com> <x2j2a41acea1004211113kf8e4de95s9ff5c1669156b82c@mail.gmail.com>
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I'd be most pleased to get near 9k. I'm running FreeBSD 8.0 amd64 on both of the the test hosts. I've reset the configurations to system default as I was getting no where with sysctl and loader.conf settings. The motherboards have been configured to do MSI interrupts. The S5000PAL has a MSI to old style interrupt BIOS setting that confuses the driver interrupt setup. The 10Gbps cards should be plugged into the 8x PCI-E slots on both hosts. I'm double checking that claim right now and will get back later. Thanks On 4/21/2010 2:13 PM, Jack Vogel wrote: > 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" >> >> > _______________________________________________ > 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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