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Date: Thu, 11 Apr 2013 18:59:11 +0200
Message-ID: <CABJ1b_QaEJbuBsqx+J1Pkc7o66S_Rboa7Trnko1mXSK6-UZhfg@mail.gmail.com>
Subject: Re: [PATCH] net: mv643xx_eth: Add GRO support
From: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
To: Willy Tarreau <w@1wt.eu>
Cc: Andrew Lunn <andrew@lunn.ch>, Jason Cooper <jason@lakedaemon.net>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        linux-kernel@vger.kernel.org, Florian Fainelli <florian@openwrt.org>,
        Soeren Moch <smoch@web.de>, Paul Mackerras <paulus@samba.org>,
        Lennert Buytenhek <buytenh@wantstofly.org>,
        Dale Farnsworth <dale@farnsworth.org>, netdev@vger.kernel.org,
        linuxppc-dev@lists.ozlabs.org, "David S. Miller" <davem@davemloft.net>,
        linux-arm-kernel@lists.infradead.org
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On Thu, Apr 11, 2013 at 5:32 PM, Willy Tarreau <w@1wt.eu> wrote:
> On Thu, Apr 11, 2013 at 05:27:03PM +0200, Sebastian Hesselbarth wrote:
>> I don't have a strong opinion on whether Soeren's or your proposal should
>> be submitted. But I insist on having one of them in, as GRO significantly
>> improves the common use case, is enabled by default, and not as
>> constrained as LRO.
>
> I agree, use yours first, but we should keep an eye on this. Since you have
> everything to run a test, please try to see if you can get netperf to run
> over IPv6, I'm sure the NIC doesn't handle it.

Willy,

out of curiosity I replayed all tests using netperf/netserver with -6 which
enables ipv6. The overall results remain quite the same here:
enabling support for GRO gives a huge improvement in achievable
throughput, and the difference between Soeren's and your patch is
neglectible.

Sebastian
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