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Date: Thu, 2 May 2024 14:48:42 +0100
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Subject: Re: [PATCH] net/af_packet: fix statistics
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: dev@dpdk.org, "John W. Linville" <linville@tuxdriver.com>,
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References: <20240430154129.7347-1-stephen@networkplumber.org>
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On 5/1/2024 5:42 PM, Stephen Hemminger wrote:
> On Wed, 1 May 2024 17:25:59 +0100
> Ferruh Yigit <ferruh.yigit@amd.com> wrote:
> 
>> On 4/30/2024 4:39 PM, Stephen Hemminger wrote:
>>> The statistics in af_packet driver do not follow the standard
>>> practice of other drivers:
>>>
>>>  - Statistics should be maintained as 64 bit even on 32 bit.
>>>   
>>
>> ack
>>
>>>  - Remove the tx_error counter since it was not correct.
>>>    When transmit ring is full it is not an error and
>>>    the driver correctly returns only the number sent.
>>>   
>>
>> nack
>> Transmit full is not only return case here.
>> There are actual errors continue to process relying this error calculation.
>> Also there are error cases like interface down.
>> Those error cases should be handled individually if we remove this.
>> I suggest split this change to separate patch.
> 
> It is possible to get errors, but the code wasn't looking for those.
> See packet(7) man page.
>

Some of the error cases are in dpdk level, so we can't just rely on
af_packet socket error counters.