On Fri, Apr 15, 2005 at 11:13:00AM +0000, tino@wildenhain.de wrote:
> after boot, beginning use of the network interfaces causes
> these messages:
> tlp0: transmit underrun; new threshold: 96/256 bytes
> tlp0: transmit underrun; new threshold: 128/512 bytes
> tlp0: transmit underrun; new threshold: 160/1024 bytes
> 
> this is immediately after few packets, ttcp measures
> about 5MB/s
> 
> after some MB of traffic:
> tlp0: transmit underrun; new threshold: store and forward mode
> 
> now performance drops to around 4MB/s
> 
> I compared with linux2.6.8 on that hardware, where 
> no problem appears in the log (may depend on the
> driver) and performance is around 8-9MB/s

FWIW, the tlp driver always end in store and forward mode on my hardware.
But I see decent network performances anyway.
tlp0 at pci0 dev 10 function 0: DECchip 21140A Ethernet, pass 2.2
tlp0: interrupting at physical irq 10, irq 6
tlp0: Ethernet address 00:80:c8:7f:d4:06
lxtphy0 at tlp0 phy 0: LXT970 10/100 media interface, rev. 0

-- 
Manuel Bouyer <bouyer@antioche.eu.org>
     NetBSD: 26 ans d'experience feront toujours la difference
--