[dpdk-dev] [RFC v2 1/2] ethdev: provide device flag to bypass ethdev queue xstats

[Ferruh Yigit]

On 10/14/2020 3:26 AM, Ferruh Yigit wrote:
> Queue stats are stored in 'struct rte_eth_stats' as array and array size
> is defined by 'RTE_ETHDEV_QUEUE_STAT_CNTRS' compile time flag.
> 
> As a result of technical board discussion, decided to remove the queue
> statistics from 'struct rte_eth_stats' in the long term.
> 
> Instead PMDs should represent the queue statistics via xstats, this
> gives more flexibility on the number of the queues supported.
> 
> Currently queue stats in the xstats are filled by ethdev layer, using
> some basic stats, when queue stats removed from basic stats the
> responsibility to fill the relevant xstats will be pushed to the PMDs.
> 
> During the switch period, temporary 'RTE_ETH_DEV_AUTOFILL_QUEUE_XSTATS'
> device flag is created. Initially all PMDs using xstats set this flag.
> The PMDs implemented queue stats in the xstats should clear the flag.
> 
> When all PMDs switch to the xstats for the queue stats, queue stats
> related fields from 'struct rte_eth_stats' will be removed, as well as
> 'RTE_ETH_DEV_AUTOFILL_QUEUE_XSTATS' flag.
> Later 'RTE_ETHDEV_QUEUE_STAT_CNTRS' compile time flag also can be
> removed.
> 
> Signed-off-by: Ferruh Yigit <ferruh.yigit at intel.com>

Hi Thomas, Andrew,

What do you think having the patch for this release?


Connor, Xavier,

Are you OK to superseded your existing patch [1] with this approach?
[1] https://patches.dpdk.org/patch/78886/