From owner-freebsd-current Thu Apr 4 09:24:54 1996 Return-Path: owner-current Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id JAA12214 for current-outgoing; Thu, 4 Apr 1996 09:24:54 -0800 (PST) Received: from brasil.moneng.mei.com (brasil.moneng.mei.com [151.186.109.160]) by freefall.freebsd.org (8.7.3/8.7.3) with ESMTP id JAA12199 for ; Thu, 4 Apr 1996 09:24:48 -0800 (PST) Received: (from jgreco@localhost) by brasil.moneng.mei.com (8.7.Beta.1/8.7.Beta.1) id LAA01512; Thu, 4 Apr 1996 11:24:03 -0600 From: Joe Greco Message-Id: <199604041724.LAA01512@brasil.moneng.mei.com> Subject: Re: tty-level buffer overflows - what to do? To: root@deadline.snafu.de (Andreas S. Wetzel) Date: Thu, 4 Apr 1996 11:24:02 -0600 (CST) Cc: current@freebsd.org In-Reply-To: from "Andreas S. Wetzel" at Apr 4, 96 05:17:42 pm X-Mailer: ELM [version 2.4 PL24] Content-Type: text Sender: owner-current@freebsd.org X-Loop: FreeBSD.org Precedence: bulk > Hi! > --- > > On a relatively fresh installed -current Box which serves as a modem > server for two V34+ modems and one V34 Modem on our local LAN, I get > lots of messages on the sysconsole when doing high-speed transfers: > > sio2: 1988 more tty-level buffer overflows (total 23215) > etc... > > This especially happens when transferring pure ASCII data which gets > quite good compressed by the two modems so that I actually transfer > at bitrates of about 50kbit and higher. > > Can I do anything about that (i.e. increase memory on this machine) or is > this a problem related to the sio driver? > > Thankful for any advice What are you doing? rz/sz? What kind of machine is it? (a 386sx/16 has much less CPU than a P90..) Are you using hardware flow control correctly? What kind of drives? IDE drives bite, particularly if they are being used at the same time as the serial port... etc, etc. "More data, please!" :-) ... Joe ------------------------------------------------------------------------------- Joe Greco - Systems Administrator jgreco@ns.sol.net Solaria Public Access UNIX - Milwaukee, WI 414/546-7968