On Sat, Dec 29, 2012 at 09:40:28AM -0800, Eric Dumazet wrote:

On Sat, 2012-12-29 at 18:50 +0400, Andrew Vagin wrote:

quoted

On Sat, Dec 29, 2012 at 05:53:23AM -0800, Eric Dumazet wrote:

quoted

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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 [off-list ref] 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 ;)

I have rebooted the host and a speed in a netns is again about 1.7MB/s. I
don't know why it was 4MB/s in the previous time.

new tcpdump and netstat are attached

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