Subject: Re: tcp weirdness ?
To: None <port-sparc64@netbsd.org, uabfra@uab.ericsson.se>
From: None <eeh@netbsd.org>
List: port-sparc64
Date: 11/07/2000 16:20:37
	I installed the 1.5-BETA on an ULTRA 1 with a lance ethernet chip
	(10Mb/s).

	When i telnet to the to the Ultra from a PC running Freebsd, The netbsd
	system does not seem
	very responsive. I noticed I have an increasing retransmit counter on
	tcp (netstat -s) on
	both the Freebsd and the netbsd machines.

	I also tried to spray ping the netbsd box (ping -f) and it is almost
	looseless.

	Anybody else that have experienced the same thing, or is it something
	with my setup.

This is a known DMA issue with machines that have streaming
buffers (basically anything better than a UltraSPARC IIi).
These issues should be fixed in the current sources and
the 1.5-beta kernel.

Yes, I know that we need a more recent -current snapshot.
But it's unlikely I'll have time until after 1.5 ships, and
maybe not then either.

Eduardo