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From: Andy Furniss <andy.furniss@dsl.pipex.com>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] tbf latency problems!
Date: Sat, 09 Apr 2005 20:28:35 +0000	[thread overview]
Message-ID: <42583AF3.3070804@dsl.pipex.com> (raw)
In-Reply-To: <20050406150437.50265.qmail@web54707.mail.yahoo.com>

Alaios wrote:
> Hi i have found a problem related with tbf and the
> latency that the tbf calculates.. I have used the
> following parameters for burst and limit
> burst 100Kbit limit 500Kbit  lat81.8ms
> burst 6Kbit   limit 6Kbit    lat 0us
> burst 200Kbit limit 100Kbit  lat 4294.9s

What is the full command you used to get those?

> 
> As u can see in the 3rd column the latency for 100Kbit
> burst and 500Kbit limit is 81.8ms but for 200Kbit and
> limit 100Kbit is 4294.9s!!! How  could be possible???
> I want to find a way to caclulate the latency for a
> packet entering my tbf.. What do u suggest me to do?

latency is worked out from rate and limit (you can also specify latency 
and let tbf work out limit (it approximates, though)).

> 
> Ah! I use the tc -s qdisc ls dev eth1 command for the
> tbf statistics

Could be a stats bug that is fixed now, what kernel/tc version do you use.

Andy.

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  reply	other threads:[~2005-04-09 20:28 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-04-06 15:04 [LARTC] tbf latency problems! Alaios
2005-04-09 20:28 ` Andy Furniss [this message]
2005-04-13  9:17 ` Alaios
2005-04-18 13:12 ` Andy Furniss

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