From: Andy Furniss <andy.furniss@dsl.pipex.com>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] HTB dequeueing in pairs fixed
Date: Sat, 31 Jan 2004 17:44:41 +0000 [thread overview]
Message-ID: <401BE989.102@dsl.pipex.com> (raw)
In-Reply-To: <401B0773.9020005@dsl.pipex.com>
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.
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next prev parent reply other threads:[~2004-01-31 17:44 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-31 1:40 [LARTC] HTB dequeueing in pairs fixed Andy Furniss
2004-01-31 10:03 ` Stef Coene
2004-01-31 15:16 ` Artūras Šlajus
2004-01-31 17:00 ` Alexander Clouter
2004-01-31 17:44 ` Andy Furniss [this message]
2004-02-01 9:26 ` Stef Coene
2004-02-01 10:21 ` Alexander Clouter
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