[dpdk-dev] [PATCH v6] eal: provide API for querying valid socket id's

[Thomas Monjalon]

22/03/2018 13:36, Anatoly Burakov:
> --- a/lib/librte_eal/common/include/rte_eal.h
> +++ b/lib/librte_eal/common/include/rte_eal.h
> @@ -57,6 +57,9 @@ enum rte_proc_type_t {
>  struct rte_config {
>  	uint32_t master_lcore;       /**< Id of the master lcore */
>  	uint32_t lcore_count;        /**< Number of available logical cores. */
> +	uint32_t numa_node_count;    /**< Number of detected NUMA nodes. */
> +	uint32_t numa_nodes[RTE_MAX_NUMA_NODES];
> +	/**< List of detected numa nodes. */

Please keep this comment on the same line if it's below 99 chars.


> --- a/lib/librte_eal/common/include/rte_lcore.h
> +++ b/lib/librte_eal/common/include/rte_lcore.h
> @@ -132,6 +132,36 @@ rte_lcore_index(int lcore_id)
>  unsigned rte_socket_id(void);
>  
>  /**
> + * Return number of physical sockets detected on the system.
> + *
> + * Note that number of nodes may not be correspondent to their physical id's:
> + * for example, a system may report two socket id's, but the actual socket id's
> + * may be 0 and 8.
> + *
> + * @return
> + *   the number of physical sockets as recognized by EAL
> + */
> +unsigned int __rte_experimental
> +rte_num_socket_ids(void);

I suggest rte_socket_count() as function name.


> +/**
> + * Return socket id with a particular index.
> + *
> + * This will return socket id at a particular position in list of all detected
> + * physical socket id's. For example, on a machine with sockets [0, 8], passing
> + * 1 as a parameter will return 8.
> + *
> + * @param idx
> + *   index of physical socket id to return
> + *
> + * @return
> + *   - physical socket id as recognized by EAL
> + *   - -1 on error, with errno set to EINVAL
> + */
> +int __rte_experimental
> +rte_socket_id_by_idx(unsigned int idx);

OK for this function.


> --- a/lib/librte_eal/linuxapp/eal/Makefile
> +++ b/lib/librte_eal/linuxapp/eal/Makefile
> -LIBABIVER := 6
> +LIBABIVER := 7

When changing the ABI version, you need to update the release notes.

There is also a deprecation notice to remove.


> --- a/lib/librte_eal/rte_eal_version.map
> +++ b/lib/librte_eal/rte_eal_version.map
> @@ -229,6 +229,8 @@ EXPERIMENTAL {
>  	rte_mp_request;
>  	rte_mp_request_async;
>  	rte_mp_reply;
> +	rte_num_socket_ids;
> +	rte_socket_id_by_idx;

This one is not in the alphabetical order.

>  	rte_service_attr_get;
>  	rte_service_attr_reset_all;
>  	rte_service_component_register;