From: w@1wt•eu (Willy Tarreau)
To: linux-arm-kernel@lists•infradead.org
Subject: MVEBU and MVNETA driver
Date: Mon, 22 Apr 2013 11:08:03 +0200 [thread overview]
Message-ID: <20130422090803.GA3715@1wt.eu> (raw)
In-Reply-To: <5174F29D.5070908@itooo.com>
On Mon, Apr 22, 2013 at 10:19:41AM +0200, Greg wrote:
> I'm using SLAB allocator.
> As for offloading, I can't seem to be able to turn it on :
> >$ ethtool -K eth0 gro on
> >Cannot set device GRO settings: Operation not supported
> >$ ethtool -K eth0 gso on
> >Cannot set device generic segmentation offload settings: Operation not
> >supported
> Default values :
> >$ ethtool -k eth0
> >Offload parameters for eth0:
> >rx-checksumming: off
> >tx-checksumming: on
> >scatter-gather: on
> >tcp-segmentation-offload: off
> >udp-fragmentation-offload: off
> >generic-segmentation-offload: off
> >generic-receive-offload: off
> >large-receive-offload: off
> >rx-vlan-offload: off
> >tx-vlan-offload: off
> >ntuple-filters: off
> >receive-hashing: off
>
> I can see 1 difference between our setups, Mirabox has an Armada370, I
> have an ArmadaXP, it would be interesting to know what Gregory is using.
OK so I guess you have a kernel version prior to 3.9-rc7. There is a bug
in the driver which causes it to report tx cksum and sg but they're not
enabled. You need to disable then enable them :
ethtool -K eth0 tx off
ethtool -K eth0 sg off
ethtool -K eth0 tx on
ethtool -K eth0 sg on
Then you can enable gso/gro. And that clearly explains a significant
performance difference.
> Another difference on my setup, and something I wanted to report you :
> there is no PHY on my system. I had to instantiate a dummy PHY in the
> device tree blob and bind it to the mvneta driver because it would fail
> at init without PHY.
I think this is more something for Thomas then.
Regards,
Willy
next prev parent reply other threads:[~2013-04-22 9:08 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-19 13:07 MVEBU and MVNETA driver Greg
2013-04-19 13:12 ` Willy Tarreau
2013-04-19 14:13 ` Greg
2013-04-19 14:43 ` Willy Tarreau
2013-04-19 14:59 ` Gregory CLEMENT
2013-04-19 16:02 ` Greg
2013-04-22 6:20 ` Willy Tarreau
2013-04-22 8:19 ` Greg
2013-04-22 9:08 ` Willy Tarreau [this message]
2013-04-22 9:40 ` Greg
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