From owner-freebsd-hackers Wed Sep 9 18:11:32 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id SAA23562 for freebsd-hackers-outgoing; Wed, 9 Sep 1998 18:04:08 -0700 (PDT) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from awfulhak.org (awfulhak.force9.co.uk [195.166.136.63]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id SAA23551 for ; Wed, 9 Sep 1998 18:04:02 -0700 (PDT) (envelope-from brian@Awfulhak.org) Received: from woof.lan.awfulhak.org (root@woof.lan.awfulhak.org [172.16.0.7]) by awfulhak.org (8.8.8/8.8.8) with ESMTP id BAA26309; Thu, 10 Sep 1998 01:23:14 +0100 (BST) (envelope-from brian@Awfulhak.org) Received: from woof.lan.awfulhak.org (brian@localhost [127.0.0.1]) by woof.lan.awfulhak.org (8.9.1/8.9.1) with ESMTP id BAA04842; Thu, 10 Sep 1998 01:21:48 +0100 (BST) (envelope-from brian@woof.lan.awfulhak.org) Message-Id: <199809100021.BAA04842@woof.lan.awfulhak.org> X-Mailer: exmh version 2.0.2 2/24/98 To: Yoav Cohen-Sivan cc: freebsd-hackers@FreeBSD.ORG Subject: Re: sio FIFO overflow? In-reply-to: Your message of "Wed, 09 Sep 1998 14:56:17 +0300." <35F66CE1.347AAE45@netvision.net.il> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Thu, 10 Sep 1998 01:21:48 +0100 From: Brian Somers Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Does this mean that PR 7755 is closable in its current incarnation ? > I think I am seeig FIFO overflows during 115200 bps transfers on a > serial port. Especially with heavy disk activity. Is there a way to flag > FIFO overflows, and is there a way to check interrupt latency? > > I've been seeing randomly-timed link lockups during almost every PPP > session I > initiate (both kernel and user). The lockups clear after hanging up and > redialling. > > I finally lowered my bps from 115200 to 57600, and voila! lockups have > disappeared. I've spent the better part of the past 3 days banging on > the link (and my phone bill) like there's no tomorrow. > > The lockups were usually during heavy link and system use, and I'm > thinking > the serial FIFO was overflowing, but the sio driver latency was too > great to respond in time. > > Could this have caused some corrupted packets to be sent to my ISP > (using Cisco 5200 equipment), causing it to ignore me for the duration > of the session? > > Yoav -- Brian , , Don't _EVER_ lose your sense of humour.... To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message