On 2024-09-12 13:23, Varghese, Vipin wrote:
[Public]
Snipped
To to be clear; it's something like this I think of when I say "DOM-style" API.
#ifndef RTE_HWTOPO_H
#define RTE_HWTOPO_H
struct rte_hwtopo_node;
enum rte_hwtopo_node_type {
RTE_HWTOPO_NODE_TYPE_CPU_CORE,
RTE_HWTOPO_NODE_TYPE_CACHE,
RTE_HWTOPO_NODE_TYPE_NUMA
};
int
rte_hwtopo_init(void);
struct rte_hwtopo_node *
rte_hwtopo_get_core_by_lcore(unsigned int lcore);
struct rte_hwtopo_node *
rte_hwtopo_get_core_by_id(unsigned int os_cpu_id);
struct rte_hwtopo_node *
rte_hwtopo_parent(struct rte_hwtopo_node *node);
struct rte_hwtopo_node *
rte_hwtopo_first_child(struct rte_hwtopo_node *node);
struct rte_hwtopo_node *
rte_hwtopo_next_child(struct rte_hwtopo_node *node,
struct rte_hwtopo_node *child);
struct rte_hwtopo_node *
rte_hwtopo_first_sibling(struct rte_hwtopo_node *node);
struct rte_hwtopo_node *
rte_hwtopo_next_sibling(struct rte_hwtopo_node *node,
struct rte_hwtopo_node *child);
enum rte_hwtopo_node_type
rte_hwtopo_get_type(struct rte_hwtopo_node *node);
#define RTE_HWTOPO_NODE_ATTR_CORE_FREQUENCY_NOMINAL 0 #define
RTE_HWTOPO_NODE_ATTR_CACHE_LEVEL 1 #define
RTE_HWTOPO_NODE_ATTR_CACHE_SIZE 2
int
rte_hwtopo_get_attr_int64(struct rte_hwtopo_node *node, unsigned int
attr_name,
int64_t *attr_value);
int
rte_hwtopo_get_attr_str(struct rte_hwtopo_node *node, unsigned int
attr_name,
char *attr_value, size_t capacity);
#endif
Surely, this too would be awkward (or should I say cumbersome) to use in certain scenarios.
This appears to be more like hwloc api calls, as shared in my earlier
email my intention with the API suggestion is not introduce new library.
I have certain reservations and with my current understanding I am not
able to map certain DPDK core mapping. Let discuss this in technical call.
Snipped
It still would need to be a part of EAL (so not a new library), since
EAL surely would depend on it (sooner rather than later).
If this functionality should be a new library, or a new API in an
existing library, it doesn't really matter if your original intentions
where something else, does it.
