Date: Mon, 18 Sep 2006 14:52:12 +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: <20060918145122.W1253@fledge.watson.org> In-Reply-To: <op.tftz7jyl7fdgru@medion-8800> References: <op.tftz7jyl7fdgru@medion-8800>
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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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