20/10/2017 02:03, Ferruh Yigit:
> ethdev xstat get by id APIs:
> rte_eth_xstats_get_names_by_id()
> rte_eth_xstats_get_by_id()
>
> Works on ids calculated as "basic stats + device specific stats"
>
> When an application asking for id less than "basic stats count", it is
> indeed asking basic stats nothing specific to device stats.
>
> The dev_ops PMDs implements xstats_get_names_by_id and xstats_get_by_id
> works on device specific ids.
>
> This patch adds a check if all stats requested by ids can be provided
> via device and if so converts ids to device specific ones.
>
> This conversion wasn't required before commit 8c49d5f1c219, because
> _by_id dev_ops were always used to get whole stats instead of specific
> ids.
>
> Fixes: 8c49d5f1c219 ("ethdev: rework xstats retrieve by id")
It would be easier to understand if starting with a statement of bug.
> --- a/lib/librte_ether/rte_ethdev.c
> +++ b/lib/librte_ether/rte_ethdev.c
> @@ -1644,6 +1644,7 @@ rte_eth_xstats_get_names_by_id(uint16_t port_id,
> uint64_t *ids)
> {
> struct rte_eth_xstat_name *xstats_names_copy;
> + unsigned int all_ids_from_pmd = 1;
This variable would be better renamed as "no_basic_stat_requested".
> + ids_copy[i] = ids[i] - basic_count;
This line may deserve a comment.
