On 6/23/20 5:48 PM, Stephen Hemminger wrote:
> On Tue, 23 Jun 2020 14:48:54 +0800
> Chengchang Tang <tangchengch...@huawei.com> wrote:
>
>> In common practice, PMD configure the rx_buf_size according to the data
>> room size of the object in mempool. But in fact the final value is related
>> to the specifications of hw, and its values will affect the number of
>> fragments in recieving pkts.
>>
>> At present, we seem to have no way to espose relevant information to upper
>> layer users.
>>
>> Add a field named rx_bufsize in rte_eth_rxq_info to indicate the buffer
>> size used in recieving pkts for hw.
>>
>> Signed-off-by: Chengchang Tang <tangchengch...@huawei.com>
>> ---
>> lib/librte_ethdev/rte_ethdev.h | 1 +
>> 1 file changed, 1 insertion(+)
>>
>> diff --git a/lib/librte_ethdev/rte_ethdev.h b/lib/librte_ethdev/rte_ethdev.h
>> index 0f6d053..82b7e98 100644
>> --- a/lib/librte_ethdev/rte_ethdev.h
>> +++ b/lib/librte_ethdev/rte_ethdev.h
>> @@ -1306,6 +1306,7 @@ struct rte_eth_rxq_info {
>> struct rte_eth_rxconf conf; /**< queue config parameters. */
>> uint8_t scattered_rx; /**< scattered packets RX supported. */
>> uint16_t nb_desc; /**< configured number of RXDs. */
>> + uint16_t rx_bufsize; /**< size of RX buffer. */
>> } __rte_cache_min_aligned;
>>
>> /**
>> --
>> 2.7.4
>>
>
> Will have to wait until 20.11 as it is an ABI change.
>
I thought about it.
If I'm not mistaken it does not change size of the structure.
