Subject: Re: SILO overflows.
To: RiscBSD mailing list <port-arm32@NetBSD.ORG>
From: Markus Baeurle <emw4maba@rghx50.gp.fht-esslingen.de>
List: port-arm32
Date: 07/05/1996 23:19:27
On Fri, 5 Jul 1996, Mark Brinicombe wrote:

>   I don;t know if others have noticed less SILO overflows since 
> I changes the interrupt system.

With 4339 I get dozens of ibuf overflows instead. Any net connections 
effectively stopped after a while. So they did not come right from the 
start, but only after a few minutes.

> THis has not removed the problem completely. One thing people
> can try and will probably be in future kernels is to
> lower the serial FIFO trigger point from 8 to 4
> (search arm32/mainbus/com.c for FIFO_8 and replace with FIFO_4)
> This is significantly reduced my SILO overflows as it will give
> more times between the serial interrupt and the FIFO actually
> filling up.

Are these changes available from the NetBSD sup server yet?

Gruss, MB