Date: Thu, 12 Jun 1997 09:27:50 +0200 (MET DST) From: Luigi Rizzo <luigi@labinfo.iet.unipi.it> To: poduri@scf-fs.usc.edu (poduri) Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: TCP Message-ID: <199706120727.JAA10471@labinfo.iet.unipi.it> In-Reply-To: <Pine.SV4.3.94.970611132047.27579A-100000@castor.usc.edu> from "poduri" at Jun 11, 97 01:24:54 pm
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> Hi > > I have observed that TCP as implemented in FreeBSD does not do a > proper slow start. It increases the window size by a packet size worth > bytes for each ack received until the max window size and then it's > stable. So on receiving a delayed ack say for two packets at teh same time > it still increases its window only by one packet and not two. So what is the problem, this is the way it has to be. For simplicity, some books and papers describe the slow start and cong.avoidance without using delayed acks, but the use of delayed acks _is_ supposed to make window expansion less aggressive. That's all. Cheers Luigi -----------------------------+-------------------------------------- Luigi Rizzo | Dip. di Ingegneria dell'Informazione email: luigi@iet.unipi.it | Universita' di Pisa tel: +39-50-568533 | via Diotisalvi 2, 56126 PISA (Italy) fax: +39-50-568522 | http://www.iet.unipi.it/~luigi/ _____________________________|______________________________________
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