From: Timo Teras <timo.teras@iki.fi>
To: Ben Hutchings <bhutchings@solarflare.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>, <netdev@vger.kernel.org>,
Francois Romieu <romieu@fr.zoreil.com>
Subject: Re: linux-3.0.18+r8169+ipv4/tcp forwarding = tso/gso weirdness and performance degration
Date: Wed, 14 Mar 2012 21:51:42 +0200 [thread overview]
Message-ID: <20120314215142.655ae607@vostro> (raw)
In-Reply-To: <1331753354.2564.7.camel@bwh-desktop.uk.solarflarecom.com>
On Wed, 14 Mar 2012 19:29:14 +0000 Ben Hutchings
<bhutchings@solarflare.com> wrote:
> On Wed, 2012-03-14 at 19:29 +0200, Timo Teras wrote:
> [...]
> > gro off. I am even trying now with:
> >
> > Offload parameters for eth2:
> > rx-checksumming: off
> > tx-checksumming: off
> > scatter-gather: off
> > tcp segmentation offload: off
> > udp fragmentation offload: off
> > generic segmentation offload: off
> [...]
>
> GRO isn't even reported there! Apparently you need a newer version of
> ethtool.
Very good point. I thought gso also enabled gro, but seems that my
ethtool was old.
And GRO was enabled along with some other stuff. Turning GRO off made
my tcp performance immediately a lot better; jumped from 2MB/s to 8MB/s
or so (not ideal yet, though; but the remainder of the difference could
be related to other issue).
So something is definitely broke in 3.0.x with GRO enabled, but GSO off.
next prev parent reply other threads:[~2012-03-14 19:52 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-14 17:01 linux-3.0.18+r8169+ipv4/tcp forwarding = tso/gso weirdness and performance degration Timo Teras
2012-03-14 17:15 ` Eric Dumazet
2012-03-14 17:29 ` Timo Teras
2012-03-14 18:25 ` Eric Dumazet
2012-03-14 19:29 ` Ben Hutchings
2012-03-14 19:51 ` Timo Teras [this message]
2012-03-14 20:12 ` Eric Dumazet
2012-03-14 20:33 ` Timo Teras
2012-03-14 20:52 ` Eric Dumazet
2012-03-14 20:53 ` Francois Romieu
2012-03-15 6:06 ` Timo Teras
2012-03-15 15:11 ` Timo Teras
2012-03-15 16:11 ` Eric Dumazet
2012-03-15 18:47 ` Timo Teras
2012-03-15 19:11 ` Francois Romieu
2012-03-16 20:15 ` Timo Teras
2012-03-17 9:56 ` Timo Teras
2012-03-17 11:35 ` Francois Romieu
2012-03-17 22:20 ` Francois Romieu
2012-03-18 7:00 ` Timo Teras
2012-03-20 15:31 ` Timo Teras
2012-03-20 18:20 ` Francois Romieu
2012-03-14 21:16 ` Francois Romieu
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