[dpdk-dev] about rx checksum flags

[Olivier Matz]

Hi,

On 06/08/2016 10:22 AM, Chandran, Sugesh wrote:
>>> I guess the IP checksum also important as L4. In some cases, UDP
>>> checksum is zero and no need to validate it. But Ip checksum is
>>> present on all the packets and that must be validated all  the time.
>>> At higher packet rate, the ip checksum offload can offer slight performance
>> improvement. What do you think??
>>>
>>
>> Agree, in some situations (and this is even more true with packet types /
>> smartnics), the application could process without accessing the packet data if
>> we keep the IP cksum flags.
> [Sugesh] True, If that's the case, Will you considering to implement IP
> checksum flags as well along with L4?
> As you said , this will be useful when we offload packet lookup itself into the NICs(May be
> when using Flow director) ? 

Yes, I plan to implement the same rx status flags (good, bad, unknown,
none) for rx IP checksum too.

Regards,
Olivier