On Wed, 20 Feb 2019 at 10:09, Pavel Popa <pashinho1990@xxxxxxxxx> wrote:
>
> Hi all,
>
> I'd like to know a detail regarding the handling of AF_XDP's
> <producer, consumer> ring pairs (i.e <fill, rx>, <completion, tx>).
> When writing in a producer ring the values {0, 1, 2, 3} exactly in
> this order and updating the head pointer by += 4, will the consumer
> ring will be populated with these values {0, 1, 2, 3} in exactly this
> order?
>
No, items completion/rx can be in a different order than tx/fill. IOW,
in-order cannot be assumed.
Björn
> Thanks
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