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To: Olivier MATZ <olivier.matz@6wind.com>,
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From: "Hunt, David" <david.hunt@intel.com>
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Date: Thu, 16 Jun 2016 08:47:46 +0100
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Subject: Re: [dpdk-dev] [PATCH v12 0/3] mempool: add external mempool manager
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On 15/6/2016 5:40 PM, Olivier MATZ wrote:
>
>
> On 06/15/2016 06:34 PM, Hunt, David wrote:
>>
>>
>> On 15/6/2016 1:03 PM, Olivier MATZ wrote:
>>> [...]
>>>
>>> The opaque pointer would be saved in mempool structure, and used
>>> when the mempool is populated (calling mempool_ops_alloc).
>>> The type of the structure pointed by the opaque has to be defined
>>> (and documented) into each mempool_ops manager.
>>>
>>>
>>> Olivier
>>
>>
>> OK, just to be sure before I post another patchset.....
>>
>> For the rte_mempool_struct:
>>          struct rte_mempool_memhdr_list mem_list; /**< List of memory
>> chunks */
>> +       void *ops_args;                  /**< optional args for ops
>> alloc. */
>>
>> (at the end of the struct, as it's just on the control path, not to
>> affect fast path)
>
> Hmm, I would put it just after pool_data.
>

When I move it to just after pool data, the performance of the 
mempool_perf_autotest drops by 2% on my machine for the local cache tests.
I think I should leave it where I suggested.

Regards,
David.