From mboxrd@z Thu Jan 1 00:00:00 1970 From: "David Boreham" Date: Mon, 09 Dec 2002 18:39:12 +0000 Subject: Re: [LARTC] how to get the latency down on maxed out classes? Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lartc@vger.kernel.org > Similarly, I don't understand the latency issue. An application that > cares about latency will not create a large backlog. I think the problem may be that a TCP flow will create a queue of packets, behind which all other packets queue. Thus one sees 200ms latency via 'ping'. Of course this is exactly what you would see on a real connection of the specified throttled speed (e.g. a DSL line). However it seems to surprise folks that there's a relationship between throughput and latency. They expect to be able to throttle traffic to 100Kbits, but still see 5ms latency. Without special measures that isn't going to happen. _______________________________________________ LARTC mailing list / LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/