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Date: Thu, 24 Feb 2000 12:04:38 +0100
From: Pascal Hofstee <daeron@shadowmere.student.utwente.nl>
To: freebsd-current@freebsd.org
Subject: dc0 wierdness with Compex Freedomline
Message-ID: <20000224120438.A24299@shadowmere.student.utwente.nl>
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Hello,

I am experiencing some weird problems with the dc-driver for a specific
ethernet-card ... the Compex Freedomline (10/100 Mbps).

The card perfectly seems to autodetect the mode it should operate on and
seems to indeed be working just fine just after the system has booted up.

--[dmesg]-------

dc0: <Intel 21143 10/100BaseTX> port 0xb400-0xb47f mem
0xdd000000-0xdd00007f irq 11 at device 12.0 on pci0 dc0: Ethernet address:
00:80:48:e7:1a:8e
miibus0: <MII bus> on dc0
dcphy0: <Intel 21143 NWAY media interface> on miibus0
dcphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto

--[ifconfig]------

sl0: flags=c010<POINTOPOINT,LINK2,MULTICAST> mtu 552
ppp0: flags=8010<POINTOPOINT,MULTICAST> mtu 1500
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
	inet 127.0.0.1 netmask 0xff000000
dc0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	inet 130.89.226.126 netmask 0xffff0000 broadcast 130.89.255.255
	ether 00:80:48:e7:1a:8e
	media: autoselect (100baseTX <full-duplex>)
	status: active
	supported media: autoselect 100baseTX <full-duplex> 100baseTX
	10baseT/UTP <full-duplex> 10baseT/UTP 100baseTX <hw-loopback> none 


Downloading an 128 MB-file from the network to /dev/null results in speeds
like 9.8 MB/s (close to the theoretical maximum for a 100 Mbps network)

After a (little) while though network performance almost comes to a halt
somewhere around 6 to 32 kB/s ... and never seems to "recover" again.

--[uname]------
FreeBSD cam043216.student.utwente.nl 4.0-CURRENT FreeBSD 4.0-CURRENT #0:
Sat Feb 19 10:29:30 CET 2000
dingo@cam043216.student.utwente.nl:/usr/src/sys/compile/DINGO  i386



Anybody that could help me out trying to figure out why the card seems to
break down like this ?

-- 
  Pascal Hofstee      < daeron @ shadowmere . student . utwente . nl >
  Managers know it must be good because the programmers hate it so much.


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