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

[Chengchang Tang <tangchengchang@huawei.com>]

Hi Ferruh,

Thank you for your reply. I'm sorry to bother you while you are busy with
the release. I know this change may only be accepted in the next release.
I'd like to know what the community thinks about it. If there is no
objection, I will send the patch after current release out.

On 2020/7/28 17:30, Ferruh Yigit wrote:
> 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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>>> .
>>>
>>
> 
> 
> .
>