Re: [dpdk-users] performance difference between ixgbe and i40e

["János Pauer" <janos.pauer@ericsson.com>]

Hi Tom,

Thank you for your reply. All the cards are in a PCIe 3x slot, but my setup is overall 10G. I have 1x 10G on the generator side, and 2x10G on the echo side, using bond mode. Did you do some meadurement in 1X10G environment?

Thanks and Regards,
János

-----Original Message-----
From: tom.barbette@uliege.be [mailto:tom.barbette@uliege.be] 
Sent: 2018. január 16., kedd 17:28
To: János Pauer <janos.pauer@ericsson.com>
Cc: users@dpdk.org
Subject: Re: [dpdk-users] performance difference between ixgbe and i40e

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@ericsson.com>
> À: users@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