netdev - Re: Userspace network stack and netchannels.

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Date:	Wed, 26 Sep 2007 12:53:03 +0400
From:	Evgeniy Polyakov <johnpol@....mipt.ru>
To:	Robert Iakobashvili <coroberti@...il.com>
Cc:	netdev@...r.kernel.org
Subject: Re: Userspace network stack and netchannels.

Hi Robert.

On Tue, Sep 25, 2007 at 09:20:44PM +0200, Robert Iakobashvili (coroberti@...il.com) wrote:
> > 3. Gigabit send/recv benchmark for netchannels and sockets using small
> > packets.
> > http://tservice.net.ru/~s0mbre/blog/devel/networking/2006_10_26.html
> > http://tservice.net.ru/~s0mbre/blog/devel/networking/2006_12_21.html
> >
> 
> Very interesting. Are there any details of your benchmarking available,
> namely, how it was done?
> Have you some comparison profiling data (oprofile) to figure out where
> the advantages are coming from?

Those are throughput tests - one sender, one receiver with different
size of the packet being sent/received. CPU usage was determined via
/proc statistics. My analysis says that reduced number of syscalls is
main improvement factor, but different (non-rfc-compliant) congestion 
control allows faster start and faster recovery.

-- 
	Evgeniy Polyakov
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