Date: Mon, 16 Jul 2001 16:20:40 +0200 (CEST) From: Luigi Rizzo <luigi@info.iet.unipi.it> To: Tim <tim@futuresouth.com> Cc: Matt Dillon <dillon@earth.backplane.com>, Leo Bicknell <bicknell@ufp.org>, Drew Eckhardt <drew@PoohSticks.ORG>, hackers@FreeBSD.ORG Subject: Re: eXperimental bandwidth delay product code (was Re: Network performance tuning.) Message-ID: <200107161420.QAA48911@info.iet.unipi.it> In-Reply-To: <20010715061915.A59691@futuresouth.com> from Tim at "Jul 15, 2001 06:19:15 am"
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> Cool! We were just commenting that it's too bad dummynet/ALTQ really > couldn't help the interactive response for us dial-up users. Anyway, I i haven't seen the beginning of the thread but surely both altq and dummynet can help, with the CBQ/WFQ support. In the case of dummynet, you can pace incoming traffic as well, at your endpoint. This means you act after the bottleneck, but the effect is that this way you will delay acks, and so slow down the connection eating a lot of bandwidth, and in the steady state this keeps the queue very short even before the bottleneck. Much like what products like packeteer do. cheers luigi > just tried this on my dial-up connection on a fresh -STABLE but don't > really notice any appreciable difference. > > net.inet.tcp.tcp_send_dynamic_enable: 1 > net.inet.tcp.tcp_send_dynamic_min: 1024 (tried it with default 4096 too) > > My ssh response is still about 3 or 4 seconds behind my typing. What > should a dial-up user expect? > > Thanks! > > Tim > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-hackers" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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