FreeBSD 8.0 ixgbe Poor Performance

[Jack Vogel]

Use my new driver and it will tell you when it comes up with the slot speed
is,
and if its substandard it will SQUAWK loudly at you :)

I think the S5000PAL only has Gen1 PCIE slots which is going to limit you
somewhat. Would recommend a current generation (x58 or 5520 chipset)
system if you want the full benefit of 10G.

BTW, you dont way what adapter, 82598 or 82599, you are using?

Jack


On Wed, Apr 21, 2010 at 12:52 PM, Stephen Sanders
<ssanders at softhammer.net>wrote:

> 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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> >>
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>