From owner-freebsd-questions Wed Nov 5 16:24:19 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id QAA21926 for questions-outgoing; Wed, 5 Nov 1997 16:24:19 -0800 (PST) (envelope-from owner-freebsd-questions) Received: from awfulhak.demon.co.uk (awfulhak.demon.co.uk [158.152.17.1]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id QAA21861 for ; Wed, 5 Nov 1997 16:24:03 -0800 (PST) (envelope-from brian@awfulhak.org) Received: from gate.lan.awfulhak.org (localhost [127.0.0.1]) by awfulhak.demon.co.uk (8.8.7/8.8.5) with ESMTP id AAA03991; Thu, 6 Nov 1997 00:08:53 GMT Message-Id: <199711060008.AAA03991@awfulhak.demon.co.uk> X-Mailer: exmh version 2.0zeta 7/24/97 To: Evan Champion cc: freebsd-questions@FreeBSD.ORG Subject: Re: sio buffer overflows In-reply-to: Your message of "Wed, 05 Nov 1997 10:35:38 EST." Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Thu, 06 Nov 1997 00:08:53 +0000 From: Brian Somers Sender: owner-freebsd-questions@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk > I'm on an unladen (just running X) Pentium Pro 200 with a 16650. I am What's a 16650 (is this the thing w/ the 256 byte FIFO) ? > doing iijppp over multilink PPP on this port. The port speed is set to ppp doesn't support multilink PPP yet. > 57600 (230.4K effective). The port is detected as a 16650. I am running > a very recent -current. If the port speed is set to 57600, then that's the maximum data rate (although you may get more if you're using PREDICTOR1 and/or VJ compression). If your modem is running at 14400, you shouldn't see the overflows unless there's a problem with your UART. If your modem is running at 28.8 or 33.6, you ought to up your DTR to 115200. If you still get the overflows, I'd start looking at the UART...... > One would think that such a system would have no problems keeping up with > the load, but I'm seeing these sort of things in my logs: > > sio3: 2 more silo overflows (total 2) > sio3: 1 more silo overflow (total 3) > sio3: 321 more tty-level buffer overflows (total 321) > > While installing -current over PPP I was getting hundreds of overflows. > > There aren't any IRQ conflicts so I'm at a loss to explain these. Is > there something I cna do to reduce the overflows? > > Thanks. > > Evan > -- Brian , , Don't _EVER_ lose your sense of humour....