[dpdk-users] [dpdk-dev] QoS: The difference of traffic class between subport and pipe in QoS

[lvenyong at 1218.com.cn]

Thanks for your answer!  But i haved not understand it. 
what is the role of traffic class in subport, and the  relationship with the traffic class in pipe ?
The  traffic class in function of rte_sched_port_pkt_write is subport's or pipe's ?
void rte_sched_port_pkt_write(struct rte_mbuf *pkt,
 uint32_t subport, uint32_t pipe, uint32_t traffic_class,
 uint32_t queue, enum rte_meter_color color);



lvenyong at 1218.com.cn
 
From: Dumitrescu, Cristian
Date: 2016-09-01 01:44
To: lvenyong; dev at dpdk.org
CC: users at dpdk.org
Subject: RE: [dpdk-dev] QoS: The difference of traffic class between subport and pipe in QoS
 
 
> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of lvenyong
> Sent: Wednesday, August 31, 2016 12:34 PM
> To: dev at dpdk.org
> Cc: users at dpdk.org
> Subject: [dpdk-dev] QoS: The difference of traffic class between subport and
> pipe in QoS
> 
> HI !
> 
> Is there difference of traffic class between subport and pipe in QOS ?
> 
> After read prog_guide-2.2.pdf we kown that the scheduling hierarchy is port,
> subport, pipe, traffic class and queue. But the traffic class both in
> subport and pipe appeared in example of qos_sched .
> 
> [subport 0]
> tb rate = 1250000000           ; Bytes per second
> tb size = 1000000              ; Bytes
> tc 0 rate = 1250000000         ; Bytes per second
> tc 1 rate = 1250000000         ; Bytes per second
> tc 2 rate = 1250000000         ; Bytes per second
> tc 3 rate = 1250000000         ; Bytes per second
> tc period = 10                 ; Milliseconds
> pipe 0-4095 = 0                ; These pipes are configured with pipe
> profile 0
> ; Pipe configuration
> [pipe profile 0]
> tb rate = 305175               ; Bytes per second
> tb size = 1000000              ; Bytes
> tc 0 rate = 305175             ; Bytes per second
> tc 1 rate = 305175             ; Bytes per second
> tc 2 rate = 305175             ; Bytes per second
> tc 3 rate = 305175             ; Bytes per second
> tc period = 40                 ; Milliseconds
> 
> Thanks
> 
> 
 
There are 4x traffic classes. You can enforce a limit on the amount of traffic belonging to each traffic class at the subport level, as well as at the level of each pipe if you want.