Date: Wed, 13 Nov 2002 23:48:31 -0500 From: Alex Newman <dolemite@psiu.dyndns.org> To: freebsd-hackers@freebsd.org Subject: tcp randomness Message-ID: <20021114044831.GA17762@ultraalex.psiu.dyndns.org>
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So i am doing an experiment which adds a random delay to tcp flows to achieve alot of the same stuff you get with RED and was planning on testing it with a divert socket. The problem is sometimes this involves adding a delay of say 2 ms for instance. Is this even possible on intel hardware. I know that thier is almost no way to get ethernet to be that accurate (I don't know about device polling maybe that will do it) but i think adding this delay to outgoing packets before it hits the card should add the entropy i am looking for. I have a couple of questions: 1) How much delay will i encour by passing the packet out through ipfw to a divert socket? 2) Does changing the HZ rate in the kernel actually cause ints to happen faster? Will this help me? -- Alex Newman Passant, comme toi j'ai passe`. dolemite@wuli.nu Le fleuve est revenu se perdre dans sa source. www.wuli.nu/users/dolemite Fais silence; assieds-toi sur ce marbre brise`. Pose un instant le poids qui fatigue ta course; J'eus de me^me un fardeau qu'ici j'ai de`pose`. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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