Date: Fri, 05 Apr 1996 10:20:16 -0700 From: Warner Losh <imp@village.org> To: Joe Greco <jgreco@brasil.moneng.mei.com> Cc: nate@sri.MT.net, root@deadline.snafu.de, current@FreeBSD.org Subject: Re: tty-level buffer overflows - what to do? Message-ID: <199604051720.KAA16235@rover.village.org> In-Reply-To: Your message of Fri, 05 Apr 1996 10:59:11 CST
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: 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. I forgot to mention that we run a locally hacked IPFILT as well on our gateway and have about two dozen rules or so in our rule base. We still get about 2500-3000cps for binary data on our 28.8k modems depending more on line quality that day than on anything else.... We're so happy with this that we're thinking about putting a couple of ISDN modems on fast serial (or SYNC) cards and upgrading to 128Kbps service to our members. At least as they can afford it. Right now it seems like we have plenty of CPU to spare... Does anyone anticipate that this will be a problem? Would a SYNC card (ala Denis' company) put a smaller load on the machine than a bunch of 16550A's? Right now the load average is about 0.01 most of the time (most of that is the gated load: 35 seconds per day. We do about 450k packets to our ISP a day and about 1/10 that to the member's SLIP connections. We do about 550k packets a day on the etherent. We have about 45M interrupts on our main serial card (or about 500/s) per day. Our other connections have a more modest rate of 5-10/. Likewise, our ethernet is at about 10/s as well. These numbers are averaged over a 10 day period. Warner
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