On 04/02/2016 14:52, Olivier MATZ wrote:
> Hi David,
[snip]
Just a comment on one of your comments:
> Why not using a similar mechanism than what we have for PMDs?
>
> void rte_eal_driver_register(struct rte_driver *driver)
> {
> TAILQ_INSERT_TAIL(&dev_driver_list, driver, next);
> }
>
> To do that, you just need to add a TAILQ_ENTRY() in your
> rte_mempool_handler structure. This would avoid to duplicate the
> structure into a static array whose size is limited.
>
> Accessing to the callbacks would be easier:
>
> return mp->mp_handler->put(mp->rt_pool, obj_table, n);
One of the iterations of the code did indeed use this mechanism, however
I ran into problems with multiple processes using the same mempool. In
that case, the 'mp_handler' element of the mempool in your return
statement is only valid for one of the processes. Hence the need for
and index that's valid for all processes rather than a pointer that's
valid for only one. And it's not easy to quickly index into an element
in a queue, hence the array of 16 mempool_handler structs.
[snip]
Rgds,
Dave.
