The X540 is capable of line rate, the question is more does the hardware
around it support it.. traffic testing with linux, and freebsd
has shown this to be the case. I do not have specific openbsd data
regarding this.. but I know that you can peg 10 gigabit with that card.
RG
On 08/07/2013 09:40 PM, Florian Obser wrote:
On Wed, Aug 07, 2013 at 12:57:55PM -0400, Maxim Khitrov wrote:
On Wed, Aug 7, 2013 at 11:44 AM, Florian Obser <flor...@narrans.de> wrote:
On Wed, Aug 07, 2013 at 10:26:22AM -0400, Maxim Khitrov wrote:
[...]
Increasing the MTU on both ix0 interfaces to 9000 gives me ~7.2 Gbps:
you expect a lot of jumbo frames in front of / behind your firewall?
(if the answer is no, why are you testing that?)
It's a possibility. What this tells me, however, is that the the
throughput isn't the (main) problem. The per-packet processing
overhead appears to be the limiting factor, which is why I asked about
indeed, during my tests systat showed that the system is spending 99% in
interrupt handlers. Having context switches because you are running
iperf localy is not good[tm] in this situation.
checksum offloading.
anyway, I was testing an Intel 82599 system in July which will become
a border router. All of this is forwarding rate; it took me 2 days to
beg, borrow and steal enough hw to actually generate the traffic. (I
had 4 systems in front of and 4 systems behind the router, all doing
1Gb/s)
What tools were you using to generate the traffic and to calculate
bytes/packets per second? I assume interrupts per second came from
systat?
right, the interrupt rate came from systat, traffic was generated with
iperf and measured with bwm-mg in 30 second average mode.
iperf was running in dualtest mode and instructed to run for an hour
so that I had a chance to start all iperfs before the first one
would finish ;) no other switches (besides -c and -s of course).
Mit freundlichen Grüßen
Robert Garrett
Senior System Engineer
Technical Projects & Solutions
--
InterNetX GmbH
Maximilianstr. 6
93047 Regensburg
Germany
Tel. +49 941 59559-480
Fax +49 941 59559-245
www.internetx.com
www.facebook.com/InterNetX
www.twitter.com/InterNetX
Geschäftsführer/CEO: Thomas Mörz
Amtsgericht Regensburg, HRB 7142
