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

[Thomas Monjalon]

16/10/2020 14:16, 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?

Acked-by: Thomas Monjalon <thomas at monjalon.net>