From owner-freebsd-performance@FreeBSD.ORG Mon Sep 18 18:56:51 2006 Return-Path: X-Original-To: freebsd-performance@freebsd.org Delivered-To: freebsd-performance@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 2E0F716A416; Mon, 18 Sep 2006 18:56:51 +0000 (UTC) (envelope-from rwatson@FreeBSD.org) Received: from cyrus.watson.org (cyrus.watson.org [209.31.154.42]) by mx1.FreeBSD.org (Postfix) with ESMTP id A7E7B43D4C; Mon, 18 Sep 2006 18:56:47 +0000 (GMT) (envelope-from rwatson@FreeBSD.org) Received: from fledge.watson.org (fledge.watson.org [209.31.154.41]) by cyrus.watson.org (Postfix) with ESMTP id 56B3746B84; Mon, 18 Sep 2006 14:56:47 -0400 (EDT) Date: Mon, 18 Sep 2006 19:56:47 +0100 (BST) From: Robert Watson X-X-Sender: robert@fledge.watson.org To: Ingo In-Reply-To: Message-ID: <20060918195616.I25638@fledge.watson.org> References: <20060918145122.W1253@fledge.watson.org> MIME-Version: 1.0 Content-Type: MULTIPART/MIXED; BOUNDARY="0-871351975-1158605807=:25638" Cc: freebsd-performance@freebsd.org, freebsd-stable@freebsd.org Subject: Re: network performance problem X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 18 Sep 2006 18:56:51 -0000 This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --0-871351975-1158605807=:25638 Content-Type: TEXT/PLAIN; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE On Mon, 18 Sep 2006, Ingo wrote: > heres the output of route get 192.168.0.11: > > localhost# route get 192.168.0.11 > route to: 192.168.0.11 > destination: 192.168.0.0 > mask: 255.255.255.0 > interface: sis0 > flags: > recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu=20 > expire > 0 0 0 0 0 0 1500 = -69 > > I set the lo0 interface as you recommended from 16384 to 1500. Now I have= =20 > the same thoughput as with the IP (~2.3MB/s). > > Shouldn=B4t FreeBSD recognize, that it is it=B4s local address, like open= bsd=20 > does? What MTU does OpenBSD use on its loopback interface as compared to the=20 network interface? Robert N M Watson Computer Laboratory University of Cambridge > > > Greetings > > > Am 18.09.2006, 15:52 Uhr, schrieb Robert Watson : > >>=20 >> On Wed, 13 Sep 2006, Ingo wrote: >>=20 >>> I`ve some problems with the network performance on my Soekris NET 4801. >>> (Freebsd 6.1 release-p3) >>>=20 >>> When I start "netio" on the soekris and do a "netio localhost", I get= =20 >>> about >>> 8.4 MB/sec, and when I start with "netio 192.168.0.11"(it=B4s localhost >>> address) I get only ~2.3 MB/sec. That=B4s what top says when I do: >>=20 >> What does "route get 192.168.0.11" return? >>=20 >> What happens if you force the localhost MTU from whatever the default is= =20 >> (most >> likely 16k) to the same as the ethernet interface? >>=20 >> Robert N M Watson >> Computer Laboratory >> University of Cambridge >>=20 >>>=20 >>> localhost >>> CPU states: 2.3% user, 0.0% nice, 72.5% system, 25.2% interrupt, 0.0= %=20 >>> idle >>>=20 >>> 192.168.0.11 >>> CPU states: 1.2% user, 0.0% nice, 46.3% system, 52.5% interrupt, 0.0= %=20 >>> idle >>>=20 >>> As you can see, the interrupt load is more than doubled when I use the = Ip >>> address, and >>> I=B4ve no idea why. >>>=20 >>>=20 >>> Here are some other throughput results of the soekris: >>>=20 >>> openbsd# ftp 192.16.8.0.20=092.0 MB/sec >>> openbsd# iperf localhost 1.4 Mbit/sec >>> openbsd# iperf 192.168.0.11(it=B4s localhost address) 1.4 Mbit/sec >>> openbsd# netperf localhost 70MB/sec >>> openbsd# netperf 192.168.0.11(it=B4s localhost address) 70MB/sec >>>=20 >>> freebsd# ftp 192.168.0.20 2.3 MB/sec >>> Freebsd# iperf localhost 45 Mbit/sec >>> Freebsd# iperf 192.168.0.11 (it=B4s localhost address) 19 Mbit/sec >>> Freebsd# netperf localhost 67 Mbit/sec >>> Freebsd# netperf 192.168.0.11 (it=B4s localhost address) 19 Mbit/sec >>>=20 >>>=20 >>> What causes the difference between localhost and the ip address on=20 >>> Freebsd? >>> On Openbsd there is no diffenerce at all. >>>=20 >>>=20 >>> Greetings >>> -- >>> Erstellt mit Operas revolution=E4rem E-Mail-Modul:=20 >>> http://www.opera.com/mail/ >>> _______________________________________________ >>> freebsd-performance@freebsd.org mailing list >>> http://lists.freebsd.org/mailman/listinfo/freebsd-performance >>> To unsubscribe, send any mail to >>> "freebsd-performance-unsubscribe@freebsd.org" > > --0-871351975-1158605807=:25638--