netdev - Re: [PATCH net-next] net_sched: red: split red

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Message-ID: <1325828822.2748.27.camel@edumazet-laptop>
Date:	Fri, 06 Jan 2012 06:47:02 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Dave Taht <dave.taht@...il.com>
Cc:	David Miller <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>,
	Stephen Hemminger <shemminger@...tta.com>
Subject: Re: [PATCH net-next] net_sched: red: split red_parms into parms and
 vars

Le jeudi 05 janvier 2012 à 14:39 +0100, Eric Dumazet a écrit :

> Problems of RED are :
> 
> 1) the 'average' on highly variable trafic : It means nothing
> interesting at all.
> 
> 2) the idle time management requires to specify the link bandwidth, as a
> fixed value. This is a problem.

A third problem is that ECN marking is performed on the packet we add to
the tail of the queue. It's very late...

I am currently testing my SFQRED and I try to add ECN in the first
packet in queue so that TCP can react faster.



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