[dpdk-dev] [RFC v2 0/3] add rx buffer size for rte_eth_rxq_info

[Ferruh Yigit]

On 7/28/2020 7:29 AM, Chengchang Tang wrote:
> Friendly ping

Hi Tang,

Sorry for not making it clear, since it is a library change, the change is
already late for this release (20.08), and it will be considered for next
release. As current release out, we can continue the discussions.

> 
> On 2020/7/22 14:38, Chengchang Tang wrote:
>> In common practice, PMD configure the rx buffer size which indicate the
>> buffer length could be used for hw in receiving packts 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 when scatter is enabled. By the way, some
>> PMDs may force to enable scatter when the MTU is bigger than the hw rx
>> buffer size.
>>
>> At present, we seem to have no way to expose relevant information to upper
>> layer users.
>>
>> So, add a field named rx_buf_size in rte_eth_rxq_info to indicate the
>> buffer size used in recieving pkts for hw. And this patchset also add hns3
>> PMD implementation and update the testpmd to clarify intention.
>>
>> v2:
>> Add hns3 implementation and update testpmd.
>>
>> Chengchang Tang (2):
>>   ethdev: add a field for rte_eth_rxq_info
>>   app/testpmd: Add RX buffer size dispaly in queue info querry
>>
>> Huisong Li (1):
>>   net/hns3: add support for query of rx/tx queue info
>>
>>  app/test-pmd/config.c             |  1 +
>>  drivers/net/hns3/hns3_ethdev.c    |  2 ++
>>  drivers/net/hns3/hns3_ethdev_vf.c |  2 ++
>>  drivers/net/hns3/hns3_rxtx.c      | 48 +++++++++++++++++++++++++++++++++++++++
>>  drivers/net/hns3/hns3_rxtx.h      |  4 ++++
>>  lib/librte_ethdev/rte_ethdev.h    |  2 ++
>>  6 files changed, 59 insertions(+)
>>
>> --
>> 2.7.4
>>
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>>
>