[dpdk-dev] Traffic scheduling in DPDK

Singh, Jasvinder jasvinder.singh at intel.com
Wed Jan 6 13:57:09 CET 2016



> -----Original Message-----
> From: ravulakollu.kumar at wipro.com [mailto:ravulakollu.kumar at wipro.com]
> Sent: Wednesday, January 6, 2016 12:40 PM
> To: Singh, Jasvinder
> Cc: dev at dpdk.org
> Subject: RE: [dpdk-dev] Traffic scheduling in DPDK
> 
> Thanks Jasvinder,
> 
> Does this application works on systems with multiple NUMA Nodes ?
> 

It does. 

> Thanks,
> Uday
> 
> -----Original Message-----
> From: Singh, Jasvinder [mailto:jasvinder.singh at intel.com]
> Sent: Tuesday, January 05, 2016 3:40 PM
> To: Ravulakollu Udaya Kumar (WT01 - Product Engineering Service)
> Cc: dev at dpdk.org
> Subject: RE: [dpdk-dev] Traffic scheduling in DPDK
> 
> Hi Uday,
> 
> >
> > Thanks Jasvinder , I am running the below command
> >
> > ./build/qos_sched -c 0xe -n 1  -- --pfc "0,1,3,2" --cfg ./profile.cfg
> >
> > Bound two 1G physical ports to DPDK , and started running the above
> > command with the default profile mentioned in profile.cfg .
> > I am using lcore 3 and 2 for RX and TX. It was not successful, getting
> > the below error.
> >
> > APP: Initializing port 0... PMD: eth_igb_rx_queue_setup():
> > sw_ring=0x7f5b20ba2240 hw_ring=0x7f5b20ba2680
> dma_addr=0xbf87a2680
> > PMD: eth_igb_tx_queue_setup(): To improve 1G driver performance,
> > consider setting the TX WTHRESH value to 4, 8, or 16.
> > PMD: eth_igb_tx_queue_setup(): sw_ring=0x7f5b20b910c0
> > hw_ring=0x7f5b20b92100 dma_addr=0xbf8792100
> > PMD: eth_igb_start(): <<
> > done:  Link Up - speed 1000 Mbps - full-duplex
> > APP: Initializing port 1... PMD: eth_igb_rx_queue_setup():
> > sw_ring=0x7f5b20b80a40 hw_ring=0x7f5b20b80e80
> dma_addr=0xbf8780e80
> > PMD: eth_igb_tx_queue_setup(): To improve 1G driver performance,
> > consider setting the TX WTHRESH value to 4, 8, or 16.
> > PMD: eth_igb_tx_queue_setup(): sw_ring=0x7f5b20b6f8c0
> > hw_ring=0x7f5b20b70900 dma_addr=0xbf8770900
> > PMD: eth_igb_start(): <<
> > done:  Link Up - speed 1000 Mbps - full-duplex
> > SCHED: Low level config for pipe profile 0:
> >     Token bucket: period = 3277, credits per period = 8, size = 1000000
> >     Traffic classes: period = 5000000, credits per period = [12207,
> > 12207, 12207, 12207]
> >     Traffic class 3 oversubscription: weight = 0
> >     WRR cost: [1, 1, 1, 1], [1, 1, 1, 1], [1, 1, 1, 1], [1, 1, 1, 1]
> > EAL: Error - exiting with code: 1
> >   Cause: Unable to config sched subport 0, err=-2
> 
> 
> In default profile.cfg, It is assumed that all the nic ports have 10 Gbps rate.
> The above error occurs when subport's  tb_rate (10Gbps) is found more than
> NIC port's capacity (1 Gbps). Therefore, you need to use either 10 Gbps ports
> in your application or have to amend the profile.cfg to work with 1 Gbps port.
> Please refer to  DPDK QoS framework document for more details on various
> parameters - http://dpdk.org/doc/guides/prog_guide/qos_framework.html
> 
> 
> > -----Original Message-----
> > From: Singh, Jasvinder [mailto:jasvinder.singh at intel.com]
> > Sent: Monday, January 04, 2016 9:26 PM
> > To: Ravulakollu Udaya Kumar (WT01 - Product Engineering Service);
> > dev at dpdk.org
> > Subject: RE: [dpdk-dev] Traffic scheduling in DPDK
> >
> > Hi Uday,
> >
> >
> > > I have an issue in running qos_sched application in DPDK .Could
> > > someone tell me how to run the command  and what each parameter
> does
> > > In the below mentioned text.
> > >
> > > Application mandatory parameters:
> > >     --pfc "RX PORT, TX PORT, RX LCORE, WT LCORE" : Packet flow
> > configuration
> > >            multiple pfc can be configured in command line
> >
> >
> > RX PORT - Specifies the packets receive port TX PORT - Specifies the
> > packets transmit port RXCORE - Specifies the  Core used for Packet
> > reception and Classification stage of the QoS application.
> > WTCORE-  Specifies the  Core used for Packet enqueue/dequeue operation
> > (QoS scheduling)  and subsequently transmitting the packets out.
> >
> > Multiple pfc  can be specified depending upon the number of instances
> > of qos sched required in application.  For example- in order to run
> > two instance, following can be used-
> >
> > ./build/qos_sched -c 0x7e -n 4 -- --pfc "0,1,2,3,4" --pfc "2,3,5,6"
> > --cfg "profile.cfg"
> >
> > First instance of qos sched receives packets from port 0 and transmits
> > its packets through port 1 ,while second qos sched will receives
> > packets from port 2 and transmit through port 3. In case of single qos
> > sched instance, following can be used-
> >
> > ./build/qos_sched -c 0x1e -n 4 -- --pfc "0,1,2,3,4" --cfg "profile.cfg"
> >
> >
> > Thanks,
> > Jasvinder
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