From owner-freebsd-stable Sun Mar 4 13:12:42 2001 Delivered-To: freebsd-stable@freebsd.org Received: from shell.futuresouth.com (shell.futuresouth.com [198.78.58.28]) by hub.freebsd.org (Postfix) with ESMTP id 59F2B37B71A for ; Sun, 4 Mar 2001 13:12:36 -0800 (PST) (envelope-from fullermd@futuresouth.com) Received: (from fullermd@localhost) by shell.futuresouth.com (8.11.1/8.11.1) id f24LCYJ25266; Sun, 4 Mar 2001 15:12:34 -0600 (CST) Date: Sun, 4 Mar 2001 15:12:34 -0600 From: "Matthew D. Fuller" To: Rich Wales Cc: freebsd-stable@FreeBSD.ORG Subject: Re: Silo overflows Message-ID: <20010304151234.A19983@futuresouth.com> References: <20010304065203.30478.richw@wyattearp.stanford.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <20010304065203.30478.richw@wyattearp.stanford.edu>; from richw@webcom.com on Sat, Mar 03, 2001 at 11:14:25PM -0800 X-OS: FreeBSD Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Sat, Mar 03, 2001 at 11:14:25PM -0800, a little birdie told me that Rich Wales remarked > I'm running 4.2-RELEASE on an 800-MHz Athlon system. One of the > serial ports on this machine is connected to the serial console port > on a second machine (my home firewall/bridge, running 4.2-STABLE). > > The firewall's serial console speed is set to 115200. The builtin > serial ports on both machines are 16550A's. > > I'm getting lots and lots of silo overflows on the Athlon when I > generate a large amount of output from the firewall (e.g., if I do > "ls -ls", the output is badly garbled, and I get kernel messages on > the Athlon about silo overflows). FWIW, I'm seeing the same thing on my main system (dual PPro 200, mid-Jan -CURRENT snap) when I have my laptop hooked up (115200 SLIP), though the laptop (a lowly P133) doesn't get any overflows that I've seen. I have a hard time believing the PPro doesn't have enough grunt to push a high-power 12k/sec data stream. I've been suspecting some of the changes in -CURRENT and interrupt handling on SMP, and I get an overflow maybe every 10 or 20 seconds under full-throttle data pushing, so I haven't worried about it too much. Back under 2.2-STABLE and/or 3.0-CURRENT I remember having some hacks on the sio driver that made the problem much rarer, but I think as 3.0 became -STABLE something changed and they stopped being meaningful. -- Matthew Fuller (MF4839) | fullermd@over-yonder.net Unix Systems Administrator | fullermd@futuresouth.com Specializing in FreeBSD | http://www.over-yonder.net/ "The only reason I'm burning my candle at both ends, is because I haven't figured out how to light the middle yet" To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message