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Date:      Wed, 4 Apr 2001 02:13:32 +0200
From:      "Karsten W. Rohrbach" <karsten@rohrbach.de>
To:        Mike Smith <msmith@freebsd.org>
Cc:        "Jason T. Luttgens" <lucky@lansters.com>, 'Doug Hardie' <bc979@lafn.org>, freebsd-stable@FreeBSD.ORG, "'David W. Chapman Jr.'" <dwcjr@inethouston.net>
Subject:   Re: Network performance question
Message-ID:  <20010404021332.F71262@mail.webmonster.de>
In-Reply-To: <200104022315.f32NFO702856@mass.dis.org>; from msmith@freebsd.org on Mon, Apr 02, 2001 at 04:15:23PM -0700
References:  <000001c0bbc9$cc97b990$0200010a@lucky> <200104022315.f32NFO702856@mass.dis.org>

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Mike Smith(msmith@freebsd.org)@2001.04.02 16:15:23 +0000:
> It's a reasonable assumption; it sounds like you haven't tuned the 
> FreeBSD box very well, so it's doing a lot of disk I/O.
> 
> > I tried the test under FreeBSD with the NetGear card too - in addition to
> > the 3COM. It's kinda strange, but when using the NetGear card and outputting
> > tcpdump to /dev/null there were no problems, not even many interface errors
> > (where as writing to a file causes the network to go down and tons of
> > interface errors about halfway through the capture).
> 
> This sounds like the NetGear card has issues with other PCI bus activity.
> 
what exactly is the mainboard hardware? in which slot is the card?
i recall having had severe problems on some bx tyan board with 5 pci
slots. when i used slot 1 or 5 i had dropped interrupts since they were
shared with i tink the onboard scsi. using the middle 3 slots the
problem was gone. linux seems to handle interrupt sharing on pci
differently from feebsd.

/k

-- 
> Experiments must be reproducible; they should all fail in the same way.
KR433/KR11-RIPE -- http://www.webmonster.de -- ftp://ftp.webmonster.de


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