On Fri, 2017-05-19 at 17:58 -0700, 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. > > 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 >
This was meant to be sent out as an RFC, but apparently that did not get conveyed when these were sent out Friday.
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