netdev - Re: Peak TCP performance

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Message-ID: <1381463075.4971.99.camel@edumazet-glaptop.roam.corp.google.com>
Date:	Thu, 10 Oct 2013 20:44:35 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Kyle Hubert <khubert@...il.com>
Cc:	netdev@...r.kernel.org
Subject: Re: Peak TCP performance

On Thu, 2013-10-10 at 23:33 -0400, Kyle Hubert wrote:

> Ah, yes, sorry. I'm on 3.0.80 (SLES SP2). And, no, I do not have that
> commit. In fact, the code looks quite different. There must have been
> a lot of changes?
> 

Probably ;)

> Also, my copy of ethtool does not recognize tx-nocache-copy. However,
> I do have control over the net device. Is there something there I can
> set, or is tx-nocache-copy also a new feature? I'll start digging.
> 

nocache-copy was added in 3.0, but I do find its not a gain for current
cpus.

You could get a fresh copy of ethtool sources :

git clone git://git.kernel.org/pub/scm/network/ethtool/ethtool.git
cd ethtool
./autogen.sh  ...


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