Subject: Re: wm0 receive overrun after adding lsi fibre channel card.
To: None <port-i386@NetBSD.org>
From: Matthias Scheler <tron@zhadum.de>
List: port-i386
Date: 02/24/2005 23:52:39
In article <20050224171435.GB6483@panix.com>,
	Jonathan Kay <jpk@panix.com> writes:
> the wm card is onboard, so can't really yank it, but if I were creative
> with a soldering iron.. :-)

That's broken hardware design. 33MHz 32Bit PCI is known to be too slow
for GbE. It's understandable to use it when the chipset on the board
doesn't offer anything better but that's not the case here.

> ... it has 1 pci bus--64/bit 33mhz.

Yes, indeed. So what you really need is a 64Bit GbE ethernet card. That
will be somewhat expensive. Desktop GbE NICs usually support 66MHz but
not 64Bit.

> I've included the whole dmesg here--just trying to save you some reading:
> 
> cpu0: Intel Pentium 4 (686-class), 3066.02 MHz, id 0xf27
[...]
> cpu1: Intel Pentium 4 (686-class), 3065.81 MHz, id 0xf27

I wouldn't use hyper threading on a machine which mostly handles I/O load.
The performance benefits of HT will be eaten up by the overhead of kernel
locking.

	Kind regards

-- 
Matthias Scheler                                  http://scheler.de/~matthias/