On 05/19/2017 05:58 PM, Amritha Nambiar wrote: > The following series introduces a new harware offload mode in > tc/mqprio where the TCs, the queue configurations and bandwidth rate > limits are offloaded to the hardware. The i40e driver enables the new > mqprio hardware offload mechanism factoring the TCs, queue > configuration and bandwidth rates by creating HW channel VSIs. >
nice work, fix your time stamp and line wrapping though. > In this mode, the priority to traffic class mapping and the user > specified queue ranges are used to configure the traffic class when > the 'hw' option is set to 2. This is achieved by creating HW > channels(VSI). A new channel is created for each of the traffic class > configuration offloaded via mqprio framework except for the first TC > (TC0) which is for the main VSI. TC0 for the main VSI is also > reconfigured as per user provided queue parameters. Finally, > bandwidth rate limits are set on these traffic classes through the > mqprio offload framework by sending these rates in addition to the > number of TCs and the queue configurations. > Example: > # tc qdisc add dev eth0 root mqprio num_tc 2 map 0 0 0 0 1 1 1 1\ > queues 4@0 4@4 min_rate 0Mbit 0Mbit max_rate 55Mbit 60Mbit hw 2 > > To dump the bandwidth rates: > > # tc qdisc show dev eth0 > qdisc mqprio 804a: root tc 2 map 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 > queues:(0:3) (4:7) > min rates:0bit 0bit > max rates:55Mbit 60Mbit > Looks reasonable to me thanks. Previously, rate limits were being set via dcbnl but I guess this interface is slightly nicer in that it puts all configuration in one spot. IMO it would be nice to push dcbnl users over to this. Thanks, .John
