From owner-freebsd-current Mon May 12 00:42:20 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.5/8.8.5) id AAA04745 for current-outgoing; Mon, 12 May 1997 00:42:20 -0700 (PDT) Received: from genesis.atrad.adelaide.edu.au (genesis.atrad.adelaide.edu.au [129.127.96.120]) by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id AAA04740 for ; Mon, 12 May 1997 00:42:17 -0700 (PDT) Received: (from msmith@localhost) by genesis.atrad.adelaide.edu.au (8.8.5/8.7.3) id RAA05522; Mon, 12 May 1997 17:12:08 +0930 (CST) From: Michael Smith Message-Id: <199705120742.RAA05522@genesis.atrad.adelaide.edu.au> Subject: Re: Excessive tty-level buffer overflows In-Reply-To: <199705071343.IAA00221@zuhause.mn.org> from Bruce Albrecht at "May 7, 97 08:43:59 am" To: bruce@zuhause.mn.org (Bruce Albrecht) Date: Mon, 12 May 1997 17:12:07 +0930 (CST) Cc: msmith@atrad.adelaide.edu.au, freebsd-current@FreeBSD.ORG X-Mailer: ELM [version 2.4ME+ PL28 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-current@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk Bruce Albrecht stands accused of saying: > Michael Smith writes: > > Bruce Albrecht stands accused of saying: > > > In a five minute period while running uucp via an external sportster > > > 33K modem at 57.6 KB on /dev/cuaa1, I received over 123,000 tty-level > > > buffer overflows. This is a dual CPU Pentium Pro Tyan ATX 1668, > > > running in single CPU mode. What does this mean? Is it a shoddy > > > 16550 emulation? My kernel is from Saturday, or thereabouts. > > > > Please read the sio(4) manpage, which explains what a tty-level > > overflow is. > > > > I don't think it's the serial hardware, but you may have other > > problems. > > True. But even though I was running a make world at the time, I don't > think a Pentium Pro should not have been able to handle UUCP traffic > at 57.6K. Not necesarily; do you nice your builds around? It's possible that the UUCP job was simply starved for CPU. -- ]] Mike Smith, Software Engineer msmith@gsoft.com.au [[ ]] Genesis Software genesis@gsoft.com.au [[ ]] High-speed data acquisition and (GSM mobile) 0411-222-496 [[ ]] realtime instrument control. (ph) +61-8-8267-3493 [[ ]] Unix hardware collector. "Where are your PEZ?" The Tick [[