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Date: Fri, 20 Mar 2009 17:01:54 +0100
From: Luigi Rizzo <rizzo@iet.unipi.it>
To: Sebastian Mellmann <sebastian.mellmann@net.t-labs.tu-berlin.de>
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Cc: freebsd-ipfw@freebsd.org
Subject: Re: ipfw dummynet - delay distributions when using config masks
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On Fri, Mar 20, 2009 at 04:53:26PM +0100, Sebastian Mellmann wrote:
> Hi!
> 
> 
> I'm using pipe masks for defining multiple queues per traffic flow, e.g.
> 
> $cmd pipe 100 config mask all bw $webclient_upload_bandwidth queue $queue_size delay $client_rtt_delay
> $cmd pipe 200 config mask all bw $webclient_download_bandwidth queue $queue_size delay $client_rtt_delay
> 
> $cmd add pipe 100 all from $client1_subnet to $server1_subnet in recv $in_if
> $cmd add pipe 200 all from $server1_subnet to $client1_subnet out xmit $in_if
> 
> 
> As you can see in the example above I'm defining a fixed delay value for
> all queues.
> Is it possible to define a delay distribution, e.g. min. 20ms, mean 50ms
> and max. 80ms for the pipe?

we do have something that does the thing you are asking for,
and should be committed soon to head (and easily backported to RELENG_7).

Please be patient a couple of week, the code is already working
and we only need to address some binary compatibility issue.

cheers
luigi