netdev - Re: Loopback performance from kernel 2.6.12 to 2.6.37

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Date:	Wed, 10 Nov 2010 09:49:16 +0100
From:	Jesper Dangaard Brouer <jdb@...x.dk>
To:	Xose Vazquez Perez <xose.vazquez@...il.com>
Cc:	netdev@...r.kernel.org
Subject: Re: Loopback performance from kernel 2.6.12 to 2.6.37

On Tue, 2010-11-09 at 22:35 +0100, Xose Vazquez Perez wrote:
> Jesper Dangaard Brouer wrote:
> 
> > To fix this I added "-q 0" to netcat.  Thus my working commands are:
> > 
> >  netcat -l -p 9999 >/dev/null &
> >  time dd if=/dev/zero bs=1M count=10000 | netcat -q0 127.0.0.1 9999
> > 
> > Running this on my "big" 10G testlab system, Dual Xeon 5550 2.67GHz,
> > kernel version 2.6.32-5-amd64 (which I usually don't use)
> > The results are 7.487 sec:
> 
> netcat flavor ?

Debian package netcat-traditional
 netcat version [v1.10-38]

>>From "aptitude show netcat-traditional":
 This is the "classic" netcat, written by *Hobbit*. It lacks many
features found in netcat-openbsd.

Didn't know there were that many flavors...

> http://nc110.sourceforge.net/
> http://nmap.org/ncat/
> http://www.dest-unreach.org/socat/
> http://cryptcat.sourceforge.net/
> http://netcat.sourceforge.net/
> http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/nc/


-- 
Med venlig hilsen / Best regards
  Jesper Brouer
  ComX Networks A/S
  Linux Network Kernel Developer
  Cand. Scient Datalog / MSc.CS
  Author of http://adsl-optimizer.dk
  LinkedIn: http://www.linkedin.com/in/brouer

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