Date: Mon, 18 Sep 2006 21:41:14 +0200 From: Ingo <ingom-list@freenet.de> To: "Robert Watson" <rwatson@freebsd.org> Cc: freebsd-performance@freebsd.org, freebsd-stable@freebsd.org Subject: Re: network performance problem Message-ID: <op.tf3aa0pg7fdgru@medion-8800> In-Reply-To: <20060918195616.I25638@fledge.watson.org> References: <op.tftz7jyl7fdgru@medion-8800> <20060918145122.W1253@fledge.watson.org> <op.tf27pxuo7fdgru@medion-8800> <20060918195616.I25638@fledge.watson.org>
next in thread | previous in thread | raw e-mail | index | archive | help
OpenBSD uses on sis0 MTU=1500 and lo0= MTU=33224 Am 18.09.2006, 20:56 Uhr, schrieb Robert Watson <rwatson@FreeBSD.org>: > 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). >> >> Shouldn´t FreeBSD recognize, that it is it´s 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"(it´s localhost >>>> address) I get only ~2.3 MB/sec. That´s 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 >>>> I´ve 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(it´s localhost address) 1.4 Mbit/sec >>>> openbsd# netperf localhost 70MB/sec >>>> openbsd# netperf 192.168.0.11(it´s 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 (it´s localhost address) 19 Mbit/sec >>>> Freebsd# netperf localhost 67 Mbit/sec >>>> Freebsd# netperf 192.168.0.11 (it´s 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" >>
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?op.tf3aa0pg7fdgru>