Hi I currently have QoS implemented in hardware and I am thinking of using DPDK's QoS feature to move it to software. Currently in the hardware,Based on the 4 class per pipe and 4 queues per class limitation, I was thinking of using 4 classes in DPDK-QoS and spread out the 8 h/w queues across the 4 classes. Let me explain with an example. Currently, this is how the h/w queue is represented Q0 - 10% b/w Q1- 10% b/w Q2- 15% b/w Q3 - 15% b/w Q4 - 15% b/w Q5 - 15% b/w Q6 - 10% b/w Q7 - 10% b/w
Translating the above config to DPDK-QoS, based on my application need, Q0 and Q1 can be logically grouped under class0 with upper b/w = 20%; Q2, Q3, Q4, Q5 can be logically grouped under class2 with upper b/w = 60%; Q6 and Q7 can be logically grouped under class 3 with super b/w = 20%. However, in the h/w, link sharing is available across all the 8 queues. DPDK materials say link sharing "typically" is enabled for last class, in this case class2. However, I also want class 1 or class 0 to use the remaining bandwidth when class2 does not have any traffic and so on. Can this be done in DPDK ? Do we have a concept of min and max b/w guarantee at the class level in DPDK-QoS ? Thanks ! -- regards sreenaath
