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From: tom.barbette@uliege.be
To: "János Pauer" <janos.pauer@ericsson.com>
Cc: users@dpdk.org
Subject: Re: [dpdk-users] performance difference between ixgbe and i40e
Date: Tue, 16 Jan 2018 17:27:34 +0100 (CET)	[thread overview]
Message-ID: <1672676991.50738940.1516120054797.JavaMail.zimbra@uliege.be> (raw)
In-Reply-To: <HE1PR07MB13381E453C2D804655BDBDF48DEA0@HE1PR07MB1338.eurprd07.prod.outlook.com>

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

  reply	other threads:[~2018-01-16 16:27 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-01-16 15:01 János Pauer
2018-01-16 16:27 ` tom.barbette [this message]
2018-01-17  7:50   ` János Pauer
2018-01-17  1:01 longtb5

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