pmd-rxq-show shows the Rx queue to pmd assignments as well as the pmd usage of each Rx queue. Up until now a tail length of 60 seconds pmd usage was shown for each Rx queue, as this is the value used during rebalance to avoid any spike affects. When debugging or tuning, it is also convenient to display the pmd usage of an Rx queue over a shorter time frame, so any changes config or traffic that impact pmd usage can be evaluated more quickly. This RFE is to provide an option for getting stats over a shorter time frame.
v1 series submitted here: https://mail.openvswitch.org/pipermail/ovs-dev/2022-October/398232.html https://mail.openvswitch.org/pipermail/ovs-dev/2022-October/398233.html https://mail.openvswitch.org/pipermail/ovs-dev/2022-October/398235.html https://mail.openvswitch.org/pipermail/ovs-dev/2022-October/398234.html https://mail.openvswitch.org/pipermail/ovs-dev/2022-October/398236.html A parameter is added that allows pmd-rxq-show stats pmd usage to be shown for a shorter time frame. Values are rounded up to the nearest 5 seconds as that is the measurement granularity and the value used is displayed. e.g. $ ovs-appctl dpif-netdev/pmd-rxq-show -secs 5 Displaying last 5 seconds pmd usage % pmd thread numa_id 0 core_id 4: isolated : false port: dpdk0 queue-id: 0 (enabled) pmd usage: 95 % overhead: 4 % The default time frame has not changed and the maximum value is limited to the maximum stored tail length (60 seconds).
This is merged for OVS 3.1. It is not available in earlier version of OVS.