From: Eric Dumazet <eric.dumazet@gmail.com>
To: Hannes Frederic Sowa <hannes@stressinduktion.org>
Cc: Emmanuel Jeanvoine <emmanuel.jeanvoine@inria.fr>, netdev@vger.kernel.org
Subject: Re: Poor TCP bandwidth between network namespaces
Date: Fri, 08 Feb 2013 18:17:10 -0800 [thread overview]
Message-ID: <1360376230.6696.7.camel@edumazet-glaptop> (raw)
In-Reply-To: <1360373618.6696.2.camel@edumazet-glaptop>
On Fri, 2013-02-08 at 17:33 -0800, Eric Dumazet wrote:
> Another thing to consider is the default MTU value :
>
> 65536 for lo, and 1500 for veth
>
> It easily explains half performance for veth
>
> One another thing is the tx-nocache-copy setting, this can explain some
> extra percents.
By the way I get crashes when doing :
# ip link add name veth1 type veth peer name veth0
# rmmod veth
I'll submit a patch.
prev parent reply other threads:[~2013-02-09 2:17 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-04 14:43 Poor TCP bandwidth between network namespaces Emmanuel Jeanvoine
2013-02-04 22:52 ` Hannes Frederic Sowa
2013-02-09 1:33 ` Eric Dumazet
2013-02-09 1:54 ` Rick Jones
2013-02-09 2:17 ` Eric Dumazet [this message]
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