netdev - Re: Using HTB over MultiQ

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Date:	Fri, 08 Nov 2013 09:55:29 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	John Fastabend <john.r.fastabend@...el.com>
Cc:	Anton 'EvilMan' Danilov <littlesmilingcloud@...il.com>,
	netdev@...r.kernel.org
Subject: Re: Using HTB over MultiQ

On Fri, 2013-11-08 at 07:11 -0800, John Fastabend wrote:

> 
> perf would be interesting but note that multiq still uses the root qdisc
> lock which you original stated you were trying to avoid.
> 
> mq and mqprio are really the only two existing qdiscs that work well for
> performance with small packet sizes and multiqueue nics at least in my
> experience/setup with these kinds of micro-benchmarks.

Right, but can we actually use HTB on MQ ?

I do not think so : following does not work.

for ETH in eth0
do
 tc qd del dev $ETH root 2>/dev/null

 tc qd add dev $ETH root handle 100: mq 
 for i in `seq 1 4`
 do
  tc qd add dev $ETH parent 100:$i handle $i htb
 done
done



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