linux-kernel - Re: [PATCH] net: mv643xx

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Message-ID: <20130411171339.GL1910@1wt.eu>
Date:	Thu, 11 Apr 2013 19:13:39 +0200
From:	Willy Tarreau <w@....eu>
To:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
Cc:	Andrew Lunn <andrew@...n.ch>, Jason Cooper <jason@...edaemon.net>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	linux-kernel@...r.kernel.org,
	Florian Fainelli <florian@...nwrt.org>,
	Soeren Moch <smoch@....de>, Paul Mackerras <paulus@...ba.org>,
	Lennert Buytenhek <buytenh@...tstofly.org>,
	Dale Farnsworth <dale@...nsworth.org>, netdev@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org,
	"David S. Miller" <davem@...emloft.net>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] net: mv643xx_eth: Add GRO support

On Thu, Apr 11, 2013 at 06:59:11PM +0200, Sebastian Hesselbarth wrote:
> On Thu, Apr 11, 2013 at 5:32 PM, Willy Tarreau <w@....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.

Perfect, thank you for testing this !

Best regards,
Willy

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