netdev - Re: [BUG] net: performance regression on ixgbe (Intel 82599EB 10-Gigabit NIC)

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Message-ID: <B1166ACF-986A-418C-953F-9B5F68D44C36@intel.com>
Date:	Fri, 4 Dec 2015 21:31:58 +0000
From:	"Rustad, Mark D" <mark.d.rustad@...el.com>
To:	Otto Sabart <osabart@...hat.com>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>,
	Jirka Hladky <jhladky@...hat.com>,
	"Adam Okuliar" <aokuliar@...hat.com>,
	Kamil Kolakowski <kkolakow@...hat.com>
Subject: Re: [BUG] net: performance regression on ixgbe (Intel 82599EB
 10-Gigabit NIC)

Otto Sabart <osabart@...hat.com> wrote:

> I probably found a performance regression on ixgbe (Intel 82599EB
> 10-Gigabit NIC) on v4.4-rc3. I am able to see this problem since
> v4.4-rc1.
> 
> The bug report you can find here [0].
> 
> Can somebody take a look at it?
> 
> [0] https://bugzilla.redhat.com/show_bug.cgi?id=1288124

A recent patch has disabled LRO by default because it is incompatible with forwarding. If you aren't interested in forwarding, you might try enabling lro with ethtool.

--
Mark Rustad, Networking Division, Intel Corporation

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