Subject: Re: de0/pciide0 performance conflict?
To: Allen Briggs <briggs@ninthwonder.com>
From: Manuel Bouyer <bouyer@antioche.lip6.fr>
List: port-i386
Date: 10/03/1999 14:54:02
On Sat, Oct 02, 1999 at 10:42:09AM -0400, Allen Briggs wrote:
> I've got two NetBSD/i386 1.4.1 systems with de cards sitting next to
> each other on a 100Mbps switch (Bay 350T).  Both are configured to
> "media autoselect" and both autoselect "100baseTX full-duplex".
> 
> If I ftp base.tgz from A to B, I get 60-65 KB/sec.  If I ttcp from A to B,
> I get 7781.5 KB/sec.  If I ftp base.tgz from A to /dev/null on B, I get
> 3+ MB/sec
> 
> If I ftp base.tgz from B to A, I get 4.05 MB/sec.  If I ttcp from B to A,
> I get 6669.78 KB/sec.
> 
> A - AMD K6/233 - VIA Apollo chipset - de0 100TX/full-duplex
>   - Adaptec 2940 wide SCSI disk
> B - AMD K6/233 - VIA Apollo chipset - de0 100TX/full-duplex
>   - pciide disk (using PIO mode 4, Ultra-DMA mode 2 (using DMA data transfers))

I have pretty much the same setup (it's a K6II/350, but same chipset, and
a de0 board too), I never noticed such problems.
Could you try to have a look at the bios parameters, especially the
latency value ? A value of 32 should be reasonable ...

--
Manuel Bouyer <bouyer@antioche.eu.org>
--