[dpdk-users] performance difference between ixgbe and i40e

[tom.barbette at uliege.be]

Hi János,

We actually saw the reverse behavior on our end. Does dmesg complains about your card not being on a PCI Express 3 x8 port? To achieve full 40G it is a requirement (assuming you have a 4X10G setup).

Tom

----- Mail original -----
> De: "János Pauer" <janos.pauer at ericsson.com>
> À: users at dpdk.org
> Envoyé: Mardi 16 Janvier 2018 16:01:31
> Objet: [dpdk-users] performance difference between ixgbe and i40e

> Hi all,
> 
> I am using OVS with dpdk v16.11. I have two setups for performance measurement,
> which are almost identical, the only difference is that one setup has i40e
> driven 10G NICs and the other one has ixgbe driven 10G NICs.
> I have MoonGen for packet generating, and testPMD to reflect the traffic. The
> measurement results are much higher with the ixgbe-driven card. It's about +20%
> with smaller packet sizes, and more than +40% with bigger packet sizes.
> Does anyone have any idea what can cause this? Is there any significant
> difference between the mentioned drivers?
> 
> Thanks and Regards,
> János