Date: Sat, 16 Aug 2003 01:16:21 -0700 From: Peter Losher <Peter_Losher@isc.org> To: freebsd-ipfw@freebsd.org Subject: piping killing performance on 5.1-REL-p2 Message-ID: <200308160116.22010.Peter_Losher@isc.org>
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Hi - On several of our servers that provide name service to the local network, we normally have pipes in our ipfw/ipfw2 rules as such: add pipe 1 udp from any to any 53 in pipe 1 config mask src-ip 0xffffffff buckets 1024 bw 10Kbit/s queue 3 add pipe 2 tcp from any to any 53 in pipe 2 config mask src-ip 0xffffffff buckets 1024 bw 100Kbit/s queue 3 to make sure outsiders don't slam us too hard, etc... This setup has worked fine for us in the past under 4.x, but we have now turned up our first 5.1-REL box (5.1-REL-p2 to be exact) and while the pipes work, they are killing the response times. dig queries that normally take a couple of milliseconds from another host on the same subnet now take 40-50 milliseconds. Remove the rules, and the response time goes back down to a couple of milliseconds. Note that this same configuration on a 4.x system shows very little degradation with the pipes on-line. Has the syntax changed between ipfw and ipfw2, and have others experienced this "slowness" issue. (I looked in the archives beforehand) Best Wishes - Peter -- Peter_Losher@isc.org | ISC | OpenPGP 0xE8048D08 | "The bits must flow"
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