From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hannes Ebner Date: Sun, 22 Dec 2002 02:37:49 +0000 Subject: [LARTC] HTB quantum for small rates Message-Id: List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lartc@vger.kernel.org hi devik, i have found the following you have written some time ago: > It is important to know that for precise operation quantums need to > be as small as possible and larger than MTU. Normaly you don't need > to specify quantums manualy as HTB chooses precomputed values. It > computes classe's quantum (when you add or change it) as its rate > divided by r2q global parameter. Its default value is 10 and because > typical MTU is 1500 the default is good for rates from 15 kBps (120 > kbit). For smaller minimal rates specify r2q 1 when creating qdisc - > it is good from 12 kbit which should be enough. If you will need you > can specify quantum manualy when adding or changing the class. what would be the best solution for rates smaller than 120kbit? i don't know how the higher rates are affected by scaling r2q down to 1, but would this be a solution for rates from 12kbit? would it be better to calculate the quantum for each rate or to set a small quantum for all rates? thanks in advance, hannes _______________________________________________ LARTC mailing list / LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/