Date: Fri, 5 Apr 1996 10:59:11 -0600 (CST) From: Joe Greco <jgreco@brasil.moneng.mei.com> To: imp@village.org (Warner Losh) Cc: nate@sri.MT.net, jgreco@brasil.moneng.mei.com, root@deadline.snafu.de, current@FreeBSD.org Subject: Re: tty-level buffer overflows - what to do? Message-ID: <199604051659.KAA04780@brasil.moneng.mei.com> In-Reply-To: <199604042231.PAA13355@rover.village.org> from "Warner Losh" at Apr 4, 96 03:31:16 pm
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> : 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
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