From owner-freebsd-hackers Fri Dec 15 11:00:44 1995 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id LAA11197 for hackers-outgoing; Fri, 15 Dec 1995 11:00:44 -0800 (PST) Received: from godzilla.zeta.org.au (godzilla.zeta.org.au [203.2.228.19]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id LAA11190 for ; Fri, 15 Dec 1995 11:00:41 -0800 (PST) Received: (from bde@localhost) by godzilla.zeta.org.au (8.6.9/8.6.9) id FAA26342; Sat, 16 Dec 1995 05:59:54 +1100 Date: Sat, 16 Dec 1995 05:59:54 +1100 From: Bruce Evans Message-Id: <199512151859.FAA26342@godzilla.zeta.org.au> To: nate@rocky.sri.MT.net, wilko@yedi.iaf.nl Subject: Re: sio overruns on 2.0.5R Cc: FreeBSD-hackers@FreeBSD.org Sender: owner-hackers@FreeBSD.org Precedence: bulk >> After I switched to a Asus P55TP4XE 90Mc I see things like >> >> sio0: 5 more silo overflows (total 7) >> >> The Asus supposedly has 16550A UARTs, of which I use one. >> >> On my previous MB, a 25Mc 486DX >> I used an AST/4 with 16550A chips without a single silo overflow. >> I also have the impression the UUCP datarate is now slower than >> before. >> >> This is a 14K4 modem BTW, on a 57600 baud line. >I hate to sound like a broken record, but are you *sure* you're using >flow-control? Can you use stty on the connected end to make sure? Er, flow control has no effect on silo overflows. Perhaps the problem is a downgrade to a bus-hogging DMA controller. Bruce