From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jesper Dangaard Brouer Subject: Re: Loopback performance from kernel 2.6.12 to 2.6.37 Date: Wed, 10 Nov 2010 09:49:16 +0100 Message-ID: <1289378956.15004.22.camel@firesoul.comx.local> References: <4CD9BE9C.30003@gmail.com> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org To: Xose Vazquez Perez Return-path: Received: from lanfw001a.cxnet.dk ([87.72.215.196]:41539 "EHLO lanfw001a.cxnet.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753196Ab0KJItR (ORCPT ); Wed, 10 Nov 2010 03:49:17 -0500 In-Reply-To: <4CD9BE9C.30003@gmail.com> Sender: netdev-owner@vger.kernel.org List-ID: 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