FreeBSD 8.0 ixgbe Poor Performance
Stephen Sanders
ssanders at softhammer.net
Wed Apr 21 19:52:37 UTC 2010
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 at gmail.com>wrote:
>
>
>> On Wed, Apr 21, 2010 at 9:32 AM, Stephen Sanders
>> <ssanders at 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
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