Re: [PATCH v3 01/10] rte: change xstats to use integer ids

[Remy Horton <remy.horton@intel.com>]

'noon,

On 08/06/2016 10:37, Thomas Monjalon wrote:
> 2016-05-30 11:48, Remy Horton:
>>   struct rte_eth_xstats {
>> +	/* FIXME: Remove name[] once remaining drivers converted */
>>   	char name[RTE_ETH_XSTATS_NAME_SIZE];
>
> What is the plan? This field must be deprecated with an attribute.
> We cannot have 2 different APIs depending of the driver.

This is where it gets logistically tricky..

Since there's an API/ABI breakage notice in place on this, my own 
preference would be to have the entire patchset quashed into a single 
patch. Problem is that rte/app changes (patches 1 & 7-9) are normally 
applied via master whereas driver changes (patches 2-6) go in via 
dpdk-next-net - it is not clear to me how patches should be submitted 
for this case..


> What are the remaining drivers to convert?

Opps, none. All relevant drivers are converted..


> This structure and the other one (rte_eth_xstats) are badly named.
> There is only one stat in each. So they should not have the plural form.
> rte_eth_xstat and rte_eth_xstat_name would be better.

I kept rte_eth_xstats as it was the name already in use within DPDK. 
Will change the other.


>> +int rte_eth_xstats_count(uint8_t port_id);
>
> This function is useless because we can have the count with
> rte_eth_xstats_get(p, NULL, 0)
> By the way it would be more consistent to have the same behaviour
> in rte_eth_xstats_names().

Feedback I got with earlier patches was that a seperate count function 
was preferable to overloading the fetch function using *data==NULL - is 
the use of the latter specifically preferred?

Other comments noted.

..Remy