Re: [dpdk-dev] [PATCH] net/iavf: fix Rx bytes stats

[Andrew Rybchenko <arybchenko@solarflare.com>]

On 7/17/19 7:55 AM, Stephen Hemminger wrote:
> On Wed, 17 Jul 2019 12:31:00 +0800
> Qi Zhang <qi.z.zhang@intel.com> wrote:
>
>> Exclude 4 bytes CRC for rx bytes stats.
>> This also aligned Rx stats calculation with PF.
>>
>> Fixes: f4a41a6953af ("net/avf: support stats")
>> Cc: stable@dpdk.org
>>
>> Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
>> ---
>>   drivers/net/iavf/iavf_ethdev.c | 1 +
>>   1 file changed, 1 insertion(+)
>>
>> diff --git a/drivers/net/iavf/iavf_ethdev.c b/drivers/net/iavf/iavf_ethdev.c
>> index 53dc05c78..fe75e86ab 100644
>> --- a/drivers/net/iavf/iavf_ethdev.c
>> +++ b/drivers/net/iavf/iavf_ethdev.c
>> @@ -1047,6 +1047,7 @@ iavf_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
>>   		stats->imissed = pstats->rx_discards;
>>   		stats->oerrors = pstats->tx_errors + pstats->tx_discards;
>>   		stats->ibytes = pstats->rx_bytes;
>> +		stats->ibytes -= stats->ipackets * RTE_ETHER_CRC_LEN;
>>   		stats->obytes = pstats->tx_bytes;
>>   	} else {
>>   		PMD_DRV_LOG(ERR, "Get statistics failed");
> Correct, DPDK statistics should not include CRC.

Stephen, Thomas, Ferruh,

is it documented somewhere? May be we should update fields
description and rte_eth_stats_get() which mentions these fields
as well to highlight it?

Thanks,
Andrew.