Date: Mon, 18 Sep 2006 19:56:47 +0100 (BST) From: Robert Watson <rwatson@FreeBSD.org> To: Ingo <ingom-list@freenet.de> Cc: freebsd-performance@freebsd.org, freebsd-stable@freebsd.org Subject: Re: network performance problem Message-ID: <20060918195616.I25638@fledge.watson.org> In-Reply-To: <op.tf27pxuo7fdgru@medion-8800> References: <op.tftz7jyl7fdgru@medion-8800> <20060918145122.W1253@fledge.watson.org> <op.tf27pxuo7fdgru@medion-8800>
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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: <UP,DONE,CLONING> > recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu > expire > 0 0 0 0 0 0 1500 -69 > > I set the lo0 interface as you recommended from 16384 to 1500. Now I have > the same thoughput as with the IP (~2.3MB/s). > > Shouldnīt FreeBSD recognize, that it is itīs local address, like openbsd > does? What MTU does OpenBSD use on its loopback interface as compared to the network interface? Robert N M Watson Computer Laboratory University of Cambridge > > > Greetings > > > Am 18.09.2006, 15:52 Uhr, schrieb Robert Watson <rwatson@FreeBSD.org>: > >> >> On Wed, 13 Sep 2006, Ingo wrote: >> >>> I`ve some problems with the network performance on my Soekris NET 4801. >>> (Freebsd 6.1 release-p3) >>> >>> When I start "netio" on the soekris and do a "netio localhost", I get >>> about >>> 8.4 MB/sec, and when I start with "netio 192.168.0.11"(itīs localhost >>> address) I get only ~2.3 MB/sec. Thatīs what top says when I do: >> >> What does "route get 192.168.0.11" return? >> >> What happens if you force the localhost MTU from whatever the default is >> (most >> likely 16k) to the same as the ethernet interface? >> >> Robert N M Watson >> Computer Laboratory >> University of Cambridge >> >>> >>> localhost >>> CPU states: 2.3% user, 0.0% nice, 72.5% system, 25.2% interrupt, 0.0% >>> idle >>> >>> 192.168.0.11 >>> CPU states: 1.2% user, 0.0% nice, 46.3% system, 52.5% interrupt, 0.0% >>> idle >>> >>> As you can see, the interrupt load is more than doubled when I use the Ip >>> address, and >>> Iīve no idea why. >>> >>> >>> Here are some other throughput results of the soekris: >>> >>> openbsd# ftp 192.16.8.0.20 2.0 MB/sec >>> openbsd# iperf localhost 1.4 Mbit/sec >>> openbsd# iperf 192.168.0.11(itīs localhost address) 1.4 Mbit/sec >>> openbsd# netperf localhost 70MB/sec >>> openbsd# netperf 192.168.0.11(itīs localhost address) 70MB/sec >>> >>> freebsd# ftp 192.168.0.20 2.3 MB/sec >>> Freebsd# iperf localhost 45 Mbit/sec >>> Freebsd# iperf 192.168.0.11 (itīs localhost address) 19 Mbit/sec >>> Freebsd# netperf localhost 67 Mbit/sec >>> Freebsd# netperf 192.168.0.11 (itīs localhost address) 19 Mbit/sec >>> >>> >>> What causes the difference between localhost and the ip address on >>> Freebsd? >>> On Openbsd there is no diffenerce at all. >>> >>> >>> Greetings >>> -- >>> Erstellt mit Operas revolutionärem E-Mail-Modul: >>> 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" > >
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