From owner-freebsd-current Fri Apr 5 09:00:12 1996 Return-Path: owner-current Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id JAA25331 for current-outgoing; Fri, 5 Apr 1996 09:00:12 -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 JAA25308 for ; Fri, 5 Apr 1996 09:00:05 -0800 (PST) Received: (from jgreco@localhost) by brasil.moneng.mei.com (8.7.Beta.1/8.7.Beta.1) id KAA04780; Fri, 5 Apr 1996 10:59:12 -0600 From: Joe Greco Message-Id: <199604051659.KAA04780@brasil.moneng.mei.com> Subject: Re: tty-level buffer overflows - what to do? To: imp@village.org (Warner Losh) Date: Fri, 5 Apr 1996 10:59:11 -0600 (CST) Cc: nate@sri.MT.net, jgreco@brasil.moneng.mei.com, root@deadline.snafu.de, current@FreeBSD.org In-Reply-To: <199604042231.PAA13355@rover.village.org> from "Warner Losh" at Apr 4, 96 03:31:16 pm X-Mailer: ELM [version 2.4 PL24] Content-Type: text Sender: owner-current@FreeBSD.org X-Loop: FreeBSD.org Precedence: bulk > : With 2 lines going full blast (sup updates!) I see *NO* overflows on my > : box. Again, my box is running with about 6MB of free memory all the > : time, so I rarely hit the disk, but I've done compiles on the machine to > : upgrade software with no noticeable degradation of serial speed. > > We have 4 SLIP lines going full blast from time to time on our 386 > DX-40 (with 387 math co) 8M memory and a 40MB IDE drive. There is > also a SMC Ethernet card to boot that all of our mail and news travels > out of. While there is little disk activity, we've never had a > overflow in our logs. All the internal modems that we use have 16550A > UARTs on them (or clones). This is a 1.1.5.1R system, but I doubt > that matters. All of the serial lines are locked at 115200 bps. This is my experience as well, most of my routers and infrastructure is made out of 386/40 class machines with 8MB RAM and 100-300MB IDE hard disks. I recently brought a 486DX2/50 into service to see how well I could handle more lines (6-12) on a single machine, I want to be running a more extensive firewall ruleset and the 386/40 will start to huff and puff under serious load with 3 or 4 lines active with a dozen or two IPFW rules. Heck, I ran a 386sx/16 at 115200 with 16450's, one SLIP link, and was getting 5000cps :-) ... Joe ------------------------------------------------------------------------------- Joe Greco - Systems Administrator jgreco@ns.sol.net Solaria Public Access UNIX - Milwaukee, WI 414/546-7968