Date: Mon, 18 Sep 2006 20:45:23 +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.tf27pxuo7fdgru@medion-8800> In-Reply-To: <20060918145122.W1253@fledge.watson.org> References: <op.tftz7jyl7fdgru@medion-8800> <20060918145122.W1253@fledge.watson.org>
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Hi,
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?
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
>> --
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