Re: HFSC statistic show question

Linux Advanced Routing and Traffic Control

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Thossapron Apinyapanha wrote:
> after i use "tc -s -d class ls dev eth0" will show statistic data about HFSC ,like this
>    
>   root@ubuntu:/home/shaper# tc -s -d class ls dev eth2
>   class hfsc 1: root
>   Sent 0 bytes 0 pkts (dropped 0, overlimits 0)
>   period 24 work 13844792199226589188 bytes rtwork 20937281664 bytes level 3461036864
>   class hfsc 1:11 parent 1:1 sc m1 30720Kbit d 10.0ms m2 30000bit ul m1 0bit d 0us m2 300000bit
>   Sent 332564 bytes 235 pkts (dropped 0, overlimits 0)
>   period 24 work 13844792199226589188 bytes rtwork 20937281664 bytes level 3461036864
>   class hfsc 1:1 parent 1: sc m1 0bit d 0us m2 10000bit ul m1 0bit d 0us m2 10000Kbit
>   Sent 0 bytes 0 pkts (dropped 0, overlimits 0)
>   period 24 work 13844792199226589188 bytes rtwork 20937281664 bytes level 3461036864
>   class hfsc 1:13 parent 1:1 ls m1 0bit d 0us m2 350000bit ul m1 0bit d 0us m2 500000bit
>   Sent 84 bytes 2 pkts (dropped 0, overlimits 0)
>   period 24 work 13844792199226589188 bytes rtwork 20937281664 bytes level 3461036864
>   class hfsc 1:12 parent 1:1 ls m1 0bit d 0us m2 100000bit ul m1 0bit d 0us m2 300000bit
>   Sent 0 bytes 0 pkts (dropped 0, overlimits 0)
>   period 24 work 13844792199226589188 bytes rtwork 20937281664 bytes level 3461036864
>   root@ubuntu:/home/shaper# tc -s -d qdisc ls dev eth2
>   qdisc hfsc 1: default 13
>   Sent 332648 bytes 237 pkts (dropped 0, overlimits 382)
>   root@ubuntu:/home/shaper#
>    
>   but i'm doubt what is each field mean ?? such period, work ,rtwork 
>   and what field are same like "rate" in HTB statistic command 

You're using a broken version of iproute (well, actually the kernel is
broken, but a new iproute fixes it).

The statistics mean:

period: number of times the class went to active state (no packets
queued -> packets queued)
work: number of bytes handled by real-time and link-sharing criteria
rtwork: number of bytes handled by real-time criterion
level: level in the class hierarchy

When using only linear service curves "m2" is the equivalent to rate.
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