Re: [dpdk-dev] RTE Ring removing

[Igor Ryzhov <iryzhov@arccn.ru>]

It seems to be a good idea, thank you, Olivier!

But a few questions:
1. Will this changes affect performance?
2. In PATCH 2/2 you have a small bug:

In file rte_ring.h, in comments describing rte_ring_init function you have:

+ * @param name
+ *   The size of the ring.

But it is name of the ring, not size.

Best regards,
Igor Ryzhov

07.05.2014 15:39, Olivier MATZ пишет:
> Hi Igor,
>
> On 05/07/2014 09:54 AM, Igor Ryzhov wrote:
>> I noticed that in Memzone realization there is a special global variable
>> "free_memseg" containing pointers on free memory segments.
>> An memzone reserve function just finst the best segment for allocation
>> from this "free_memseg" variable.
>>
>> So I think there is a possibility to unreserve already reserved memory
>> back to "free_memseg", and impossibility of unreserving memory is just
>> because there is no function for that, not because it is impossible in
>> principle.
>> Am I right? Or there are any restrictions?
>
> I think that implementing a freeing of memory segment is feasible, but
> it would require some work to properly merge freed zones to avoid memory
> fragmentation.
>
> Another solution is to allocate/free rings in standard memory (malloc
> for instance) instead of rte_memzones. Let me know if the patches I've
> just sent on the mailing list solves your issue.
>
> By the way, I plan to do the same thing for mempools in the coming
> weeks but there is much more work.
>
> Regards,
> Olivier
>