[dpdk-dev] [PATCH v2] mbuf: optimize rte_mbuf_refcnt_update

[Olivier MATZ]

Hi Hanoch,

On 01/05/2016 12:11 PM, Hanoch Haim (hhaim) wrote:
> Hi Oliver,
> Thank you for the fast response and it would be great to open a discussion on that.
> In general our project can leverage your optimization and I think it is great (we should have thought about it) . We can use it using the workaround I described.
> However, for me it  seems odd that  rte_pktmbuf_attach () that does not *change* anything in m_const, except of the *atomic* ref counter does not work in parallel.
> The example I gave is a classic use case of rte_pktmbuf_attach  (multicast ) and I don't see why it wouldn't work after your optimization.
>
> Do you have a pointer to the documentation that state that that you can't call the atomic ref counter from more than one thread?

Unfortunately it's not documented yet, but it's something we should
better describe.

Regards,
Olivier