From mboxrd@z Thu Jan 1 00:00:00 1970 From: Xose Vazquez Perez Subject: Re: Loopback performance from kernel 2.6.12 to 2.6.37 Date: Tue, 09 Nov 2010 22:35:24 +0100 Message-ID: <4CD9BE9C.30003@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE To: netdev@vger.kernel.org, jdb@comx.dk Return-path: Received: from mail-wy0-f174.google.com ([74.125.82.174]:49176 "EHLO mail-wy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752883Ab0KIVf2 (ORCPT ); Tue, 9 Nov 2010 16:35:28 -0500 Received: by wyb36 with SMTP id 36so5276460wyb.19 for ; Tue, 09 Nov 2010 13:35:27 -0800 (PST) Sender: netdev-owner@vger.kernel.org List-ID: Jesper Dangaard Brouer wrote: > To fix this I added "-q 0" to netcat. Thus my working commands are: >=20 > netcat -l -p 9999 >/dev/null & > time dd if=3D/dev/zero bs=3D1M count=3D10000 | netcat -q0 127.0.0.1 = 9999 >=20 > 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 ? 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/ --=20 =ABAll=E1 muevan feroz guerra, ciegos reyes por un palmo m=E1s de tierr= a; que yo aqu=ED tengo por m=EDo cuanto abarca el mar brav=EDo, a quien na= die impuso leyes. Y no hay playa, sea cualquiera, ni bandera de esplendor, que no sienta mi derecho y d=E9 pecho a mi valor.=BB