Re: HTB vs CoDel performance

On Tue, Sep 18, 2012 at 6:15 PM, Eric Dumazet [off-list ref] wrote:

On Tue, 2012-09-18 at 17:56 +0800, Lin Ming wrote:

quoted

I need traffic priority/traffic shaping/rate control ... actually all
QoS features on the router.
And if I just set the rate to gigabit(no other settings), for example,

# tc qdisc add dev eth10 root handle 20: htb default 1
# tc class add dev eth10 parent 20 classid 20:1 htb prio 2 rate
1024Mbit ceil 1024Mbit burst 1281408b cburst 1281408b

it should gain similar performance as pfifo_fast.

codel has no rate control. So seems I have to find way to optimize htb?

Are you really cpu limited ? You might hit some clocks artifacts.

Did you mean the cpu speed? It's an ARMv5 processor.
BogoMIPS	: 1196.03

rate limiting to 1Gbps probably need high resolution timers.

High resolution timer is enabled.

HTB is not the only way to rate limit.

I'll try other classful qdiscs.

Thanks.