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Date:	Wed, 26 Sep 2007 17:22:34 +0400
From:	Evgeniy Polyakov <>
To:	jamal <>
Subject: Re: Userspace network stack and netchannels.

Hi Jamal.

On Wed, Sep 26, 2007 at 09:08:45AM -0400, jamal ( wrote:
> Those numbers look impressive. How mysterious do things get in SMP?
> Sorry havent had time to stare at the code. How do you measure cpu you
> quoted?

I did not checked how netchannels and userspace stack behaves on SMP
just because I do not have SMP test machines. Getting into account that
netchannels have smaller number of locks (actually only one to queue
skb) compared to sockets, it should not behave worse, but I did not test

CPU usage was obtained via /proc/$pid statistics.

	Evgeniy Polyakov
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