netdev - Re: [RFC] netem: correlated loss generation (v3)

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Message-ID: <20100519214239.GD5146@nuttenaction>
Date:	Wed, 19 May 2010 23:42:39 +0200
From:	Hagen Paul Pfeifer <hagen@...u.net>
To:	Stephen Hemminger <shemminger@...tta.com>
Cc:	Stefano Salsano <stefano.salsano@...roma2.it>,
	David Miller <davem@...emloft.net>,
	Fabio Ludovici <fabio.ludovici@...oo.it>,
	netdev@...r.kernel.org, netem@...ts.linuxfoundation.org
Subject: Re: [RFC] netem: correlated loss generation (v3)

* Stephen Hemminger | 2010-05-17 20:56:21 [-0700]:

>Subject: netem - revised correlated loss generator
>
>This is a patch originated with Stefano Salsano and Fabio Ludovici.
>It provides several alternative loss models for use with netem.
>There are two state machine based models and one table driven model.
>
>To simplify the original code:
>   * eliminated the debugging messages and statistics
>   * reformatted for clarity
>   * changed API to nested attribute relating to loss
>   * changed the table to always loop across bits
>   * only allocate parameters needed
>
>Still untested, for comment only...
>Should have tested version before 2.6.35 merge window closes.

Why mainline? I questioning the advantage for the big audience, it looks like
a academic only piece of software - correct me if I'm wrong.

The authors pointed to some weak points in the implementation of the current
loss/correlation logic. But this "fix", add another - complicated component -
and let the broken components untouched ...

HGN

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