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From: Eric Dumazet <erdnetdev@gmail.com>
To: Andrew Vagin <avagin@parallels.com>
Cc: netdev@vger.kernel.org, vvs@parallels.com,
	"Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Subject: Re: Slow speed of tcp connections in a network namespace
Date: Sat, 29 Dec 2012 09:40:28 -0800	[thread overview]
Message-ID: <1356802828.21409.4623.camel@edumazet-glaptop> (raw)
In-Reply-To: <20121229145030.GA7959@paralelels.com>

On Sat, 2012-12-29 at 18:50 +0400, Andrew Vagin wrote:
> On Sat, Dec 29, 2012 at 05:53:23AM -0800, Eric Dumazet wrote:
> > > 3.8-rc1 is used for experiments.
> > > 
> > > Do you have any ideas where is a problem?
> > 
> > veth has absolutely no offload features
> > 
> > It needs some care...
> > 
> > At the very miminum, let TCP coalesce do its job by allowing SG
> > 
> > CC Michał Mirosław <mirq-linux@rere.qmqm.pl> for insights.
> > 
> > Please try following patch :
> 
> Hello Eric,
> 
> Thanks for your feedback.
> 
> With this patch the results is a bit better (~4MB/s), but it's much less
> than in the root netns.

Please post your new tcpdump then ;)

also post "netstat -s" from root and test ns after your wgets

  reply	other threads:[~2012-12-29 17:40 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-12-29  9:24 Slow speed of tcp connections in a network namespace Andrew Vagin
2012-12-29 13:53 ` Eric Dumazet
2012-12-29 14:50   ` Andrew Vagin
2012-12-29 17:40     ` Eric Dumazet [this message]
2012-12-29 18:29       ` Andrew Vagin
2012-12-29 18:58       ` Eric Dumazet
2012-12-29 19:41         ` Eric Dumazet
2012-12-29 20:08           ` Andrew Vagin
2012-12-29 20:20             ` Eric Dumazet
2012-12-29 21:07               ` Andrew Vagin
2012-12-29 21:12             ` Eric Dumazet
2012-12-29 21:19               ` Andrew Vagin
2012-12-29 21:15         ` Andrew Vagin
2012-12-29 16:01   ` Michał Mirosław
2012-12-30  2:26     ` [PATCH] veth: extend device features Eric Dumazet
2012-12-30 10:32       ` David Miller

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