[dpdk-dev] [dpdk-dev, PATCHv6 1/6] ethdev: enhance rte_eth_(tx|rx)q_info struct

[Amine Kherbouche]

> Yep, similar thought here:
> In the for Intel HW implementations:
> qinfo->used_desc = ixgbe_dev_rx_queue_count(dev, queue_id);
> It seems a bit redundant, as if user wants to know HW state it can call
> rte_eth_rx_queue_count() directly.
> From other side:  rte_eth_rx_queue_count() is quite heavyweight function,
> as it scans HW descriptors to check their status.
> I think it should be better to return here just a snapshot of SW state:
> how many free/used RXDs are from PMD perspective
> (by collecting info from *_rx_queue structure, without reading actual HW
> registers/descriptors - as you done for TX queue info).
>
> Konstantin
>

Yes,

Konstantin is right, it is a light solution to get an snapshot of the state
of the queues.