[dpdk-dev,v3] net/i40e: fix Rx statistic inconsistent

  rx_good_bytes and rx_good_packets statistic is inconsistent when port
stopped,ipackets statistic is minus the discard packets but rx_bytes
statistic not,but i40e has no statistic of discard bytes.So we check
"dev_started" flag, if the port is started we do the statistic work,if
stopped we don't.We can avoid the statistic inconsistent
problem by this way.

Fixes: 9aace75fc82e ("i40e: fix statistics")

Signed-off-by: Wei Zhao1 <wei.zhao1@intel.com>
---
 drivers/net/i40e/i40e_ethdev.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
  

On 8/9/2016 3:07 AM, Wei Zhao1 wrote:
> rx_good_bytes and rx_good_packets statistic is inconsistent when port
> stopped,ipackets statistic is minus the discard packets but rx_bytes
> statistic not,but i40e has no statistic of discard bytes.So we check
> "dev_started" flag, if the port is started we do the statistic work,if
> stopped we don't.We can avoid the statistic inconsistent
> problem by this way.
> 
> Fixes: 9aace75fc82e ("i40e: fix statistics")
> 
> Signed-off-by: Wei Zhao1 <wei.zhao1@intel.com>
> ---
>  drivers/net/i40e/i40e_ethdev.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
> index d0aeb70..47ed6e9 100644
> --- a/drivers/net/i40e/i40e_ethdev.c
> +++ b/drivers/net/i40e/i40e_ethdev.c
> @@ -2315,7 +2315,8 @@ i40e_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
>  	unsigned i;
>  
>  	/* call read registers - updates values, now write them to struct */
> -	i40e_read_stats_registers(pf, hw);
> +	if (dev->data->dev_started == 1)
> +		i40e_read_stats_registers(pf, hw);
>  
>  	stats->ipackets = pf->main_vsi->eth_stats.rx_unicast +
>  			pf->main_vsi->eth_stats.rx_multicast +
> @@ -2494,7 +2495,8 @@ i40e_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
>  	if (n < count)
>  		return count;
>  
> -	i40e_read_stats_registers(pf, hw);
> +	if (dev->data->dev_started == 1)
> +		i40e_read_stats_registers(pf, hw);
>  
>  	if (xstats == NULL)
>  		return 0;
> 

+cc i40e maintainers, can you please review the code?
  

NACK.
This patch is not required any more as we discussed offline.

@zhaowei, please change the patch's status in patchwork because no change is required now

> -----Original Message-----
> From: Yigit, Ferruh
> Sent: Wednesday, September 14, 2016 10:10 PM
> To: Zhao1, Wei; dev@dpdk.org; Zhang, Helin; Wu, Jingjing
> Subject: Re: [dpdk-dev] [PATCH v3] net/i40e: fix Rx statistic inconsistent
> 
> On 8/9/2016 3:07 AM, Wei Zhao1 wrote:
> > rx_good_bytes and rx_good_packets statistic is inconsistent when port
> > stopped,ipackets statistic is minus the discard packets but rx_bytes
> > statistic not,but i40e has no statistic of discard bytes.So we check
> > "dev_started" flag, if the port is started we do the statistic work,if
> > stopped we don't.We can avoid the statistic inconsistent problem by
> > this way.
> >
> > Fixes: 9aace75fc82e ("i40e: fix statistics")
> >
> > Signed-off-by: Wei Zhao1 <wei.zhao1@intel.com>
> > ---
> >  drivers/net/i40e/i40e_ethdev.c | 6 ++++--
> >  1 file changed, 4 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/net/i40e/i40e_ethdev.c
> > b/drivers/net/i40e/i40e_ethdev.c index d0aeb70..47ed6e9 100644
> > --- a/drivers/net/i40e/i40e_ethdev.c
> > +++ b/drivers/net/i40e/i40e_ethdev.c
> > @@ -2315,7 +2315,8 @@ i40e_dev_stats_get(struct rte_eth_dev *dev,
> struct rte_eth_stats *stats)
> >  	unsigned i;
> >
> >  	/* call read registers - updates values, now write them to struct */
> > -	i40e_read_stats_registers(pf, hw);
> > +	if (dev->data->dev_started == 1)
> > +		i40e_read_stats_registers(pf, hw);
> >
> >  	stats->ipackets = pf->main_vsi->eth_stats.rx_unicast +
> >  			pf->main_vsi->eth_stats.rx_multicast + @@ -2494,7
> +2495,8 @@
> > i40e_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat
> *xstats,
> >  	if (n < count)
> >  		return count;
> >
> > -	i40e_read_stats_registers(pf, hw);
> > +	if (dev->data->dev_started == 1)
> > +		i40e_read_stats_registers(pf, hw);
> >
> >  	if (xstats == NULL)
> >  		return 0;
> >
> 
> +cc i40e maintainers, can you please review the code?