I'm actually using a hacked up version of pktgen nicely driven by our
GUI tool, but the crux is that you need to set min and max src IP to some large
range.
We are driving pktgen from a separate machine. Stock pktgen isn't good at
reporting
received pkts last I checked, so it may be more difficult to easily view the
problem.
I'll be happy to set up my tool on your Fedora 24 or similar VM or machine if
you
want.
Thanks,
Ben
On 03/16/2017 07:35 PM, Alexander Duyck wrote:
Can you include the pktgen script you are running?
Also when you say you are driving traffic through the bridge are you
sending from something external on the system or are you actually
directing the traffic from pktgen into the bridge directly?
- Alex
On Thu, Mar 16, 2017 at 3:49 PM, Ben Greear <gree...@candelatech.com> wrote:
Hello,
We notice that when using two igb ports as a bridge, if we use pktgen to
drive traffic through the bridge and randomize (or use a very large range)
for the source IP addr in pktgen, then performance of igb is very poor (like
150Mbps
throughput instead of 1Gbps). It runs right at line speed if we use same
src/dest
IP addr in pktgen. So, seems it is related to lots of src/dest IP
addresses.
We see same problem when using pktgen to send to itself, and we see this in
several different kernels. We specifically tested bridge mode in this stock
Fedora kernel:
Linux lfo350-59cc 4.9.13-101.fc24.x86_64 #1 SMP Tue Mar 7 23:48:32 UTC 2017
x86_64 x86_64 x86_64 GNU/Linux
e1000e does not show this problem in our testing.
Any ideas what the issue might be and how to fix it?
Thanks,
Ben
--
Ben Greear <gree...@candelatech.com>
Candela Technologies Inc http://www.candelatech.com
--
Ben Greear <gree...@candelatech.com>
Candela Technologies Inc http://www.candelatech.com
