From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andy Furniss Date: Sat, 31 Jan 2004 17:44:41 +0000 Subject: Re: [LARTC] HTB dequeueing in pairs fixed Message-Id: <401BE989.102@dsl.pipex.com> List-Id: References: <401B0773.9020005@dsl.pipex.com> In-Reply-To: <401B0773.9020005@dsl.pipex.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lartc@vger.kernel.org Stef Coene wrote: > On Saturday 31 January 2004 02:40, Andy Furniss wrote: > >>I posted earlier when I noticed that htb was releasing packets in pairs, >>even though my burst/quantums were 1 pkt. >> >>To fix I set HTB_HYSTERESIS 0 in net/sched/sch_htb.c . >> >>This gives a noticable gain in upstream worst case latency, for me with >>256kbit/s up I used to see +90 sometimes, now it's +45. For the many who >> have 128 up it should limit them to +90 rather than +180. > > Devik told me that disabling hysteresis will give you more accuracy, but you > will loose speed. I had to disable hysteresis when I did some bursts tests. > http://docum.org/stef.coene/qos/faq/cache/36.html > > Stef > Yea - I read that a while ago, it's what gave me the idea to try 0, after changing jiffies to CPU didn't help. I doubt with my low bandwidth on a P200 I will notice much difference in load, others may of course. Andy. _______________________________________________ LARTC mailing list / LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/