[dpdk-dev] [PATCH v2] mempool: replace c memcpy code semantics with optimized rte_memcpy

Olivier Matz olivier.matz at 6wind.com
Fri Jun 17 12:40:23 CEST 2016


Hi Jerin,

On 06/03/2016 09:02 AM, Jerin Jacob wrote:
> On Thu, Jun 02, 2016 at 11:16:16PM +0200, Olivier MATZ wrote:
> Hi Olivier,
> 
>> This is probably more a measure of the pure CPU cost of the mempool
>> function, without considering the memory cache aspect. So, of course,
>> a real use-case test should be done to confirm or not that it increases
>> the performance. I'll manage to do a test and let you know the result.
> 
> OK
> 
> IMO, put rte_memcpy makes sense(this patch) as their no behavior change.
> However, if get rte_memcpy with behavioral changes makes sense some platform
> then we can enable it on conditional basics(I am OK with that)
> 
>>
>> By the way, not all drivers are allocating or freeing the mbufs by
>> bulk, so this modification would only affect these ones. What driver
>> are you using for your test?
> 
> I have tested with ThunderX nicvf pmd(uses the bulk mode).
> Recently sent out driver in ml for review

Just to let you know I do not forget this. I still need to
find some time to do a performance test.

Regards,
Olivier


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