#include <rte_memory.h>
#include <rte_branch_prediction.h>
#include <rte_ring.h>
+#include <rte_memcpy.h>
+#include <rte_common.h>
#ifdef __cplusplus
extern "C" {
* A structure that stores a per-core object cache.
*/
struct rte_mempool_cache {
- unsigned len; /**< Cache len */
+ uint32_t size; /**< Size of the cache */
+ uint32_t flushthresh; /**< Threshold before we flush excess elements */
+ uint32_t len; /**< Current cache count */
/*
* Cache is allocated to this size to allow it to overflow in certain
* cases to avoid needless emptying of cache.
/**< Total size of an object (header + elt + trailer). */
};
-#define RTE_MEMPOOL_NAMESIZE 32 /**< Maximum length of a memory pool. */
+/**< Maximum length of a memory pool's name. */
+#define RTE_MEMPOOL_NAMESIZE (RTE_RING_NAMESIZE - \
+ sizeof(RTE_MEMPOOL_MZ_PREFIX) + 1)
#define RTE_MEMPOOL_MZ_PREFIX "MP_"
/* "MP_<name>" */
*/
STAILQ_HEAD(rte_mempool_objhdr_list, rte_mempool_objhdr);
+#ifdef RTE_LIBRTE_MEMPOOL_DEBUG
+
/**
* Mempool object trailer structure
*
* trailer structure containing a cookie preventing memory corruptions.
*/
struct rte_mempool_objtlr {
-#ifdef RTE_LIBRTE_MEMPOOL_DEBUG
uint64_t cookie; /**< Debug cookie. */
-#endif
};
+#endif
+
/**
* A list of memory where objects are stored
*/
* The RTE mempool structure.
*/
struct rte_mempool {
- char name[RTE_MEMPOOL_NAMESIZE]; /**< Name of mempool. */
+ /*
+ * Note: this field kept the RTE_MEMZONE_NAMESIZE size due to ABI
+ * compatibility requirements, it could be changed to
+ * RTE_MEMPOOL_NAMESIZE next time the ABI changes
+ */
+ char name[RTE_MEMZONE_NAMESIZE]; /**< Name of mempool. */
+ RTE_STD_C11
union {
void *pool_data; /**< Ring or pool to store objects. */
uint64_t pool_id; /**< External mempool identifier. */
int flags; /**< Flags of the mempool. */
int socket_id; /**< Socket id passed at create. */
uint32_t size; /**< Max size of the mempool. */
- uint32_t cache_size; /**< Size of per-lcore local cache. */
- uint32_t cache_flushthresh;
- /**< Threshold before we flush excess elements. */
+ uint32_t cache_size;
+ /**< Size of per-lcore default local cache. */
uint32_t elt_size; /**< Size of an element. */
uint32_t header_size; /**< Size of header (before elt). */
* Prototype for implementation specific data provisioning function.
*
* The function should provide the implementation specific memory for
- * for use by the other mempool ops functions in a given mempool ops struct.
+ * use by the other mempool ops functions in a given mempool ops struct.
* E.g. the default ops provides an instance of the rte_ring for this purpose.
* it will most likely point to a different type of data structure, and
* will be transparent to the application programmer.
/**
* Create a new mempool named *name* in memory.
*
- * This function uses ``memzone_reserve()`` to allocate memory. The
+ * This function uses ``rte_memzone_reserve()`` to allocate memory. The
* pool contains n elements of elt_size. Its size is set to n.
- * All elements of the mempool are allocated together with the mempool header,
- * in one physically continuous chunk of memory.
*
* @param name
* The name of the mempool.
*
* The mempool is allocated and initialized, but it is not populated: no
* memory is allocated for the mempool elements. The user has to call
- * rte_mempool_populate_*() or to add memory chunks to the pool. Once
+ * rte_mempool_populate_*() to add memory chunks to the pool. Once
* populated, the user may also want to initialize each object with
* rte_mempool_obj_iter().
*
* Add a virtually and physically contiguous memory chunk in the pool
* where objects can be instanciated.
*
+ * If the given physical address is unknown (paddr = RTE_BAD_PHYS_ADDR),
+ * the chunk doesn't need to be physically contiguous (only virtually),
+ * and allocated objects may span two pages.
+ *
* @param mp
* A pointer to the mempool structure.
* @param vaddr
rte_mempool_mem_cb_t *mem_cb, void *mem_cb_arg);
/**
- * Dump the status of the mempool to the console.
+ * Dump the status of the mempool to a file.
*
* @param f
* A pointer to a file for output
*/
void rte_mempool_dump(FILE *f, struct rte_mempool *mp);
+/**
+ * Create a user-owned mempool cache.
+ *
+ * This can be used by non-EAL threads to enable caching when they
+ * interact with a mempool.
+ *
+ * @param size
+ * The size of the mempool cache. See rte_mempool_create()'s cache_size
+ * parameter description for more information. The same limits and
+ * considerations apply here too.
+ * @param socket_id
+ * The socket identifier in the case of NUMA. The value can be
+ * SOCKET_ID_ANY if there is no NUMA constraint for the reserved zone.
+ */
+struct rte_mempool_cache *
+rte_mempool_cache_create(uint32_t size, int socket_id);
+
+/**
+ * Free a user-owned mempool cache.
+ *
+ * @param cache
+ * A pointer to the mempool cache.
+ */
+void
+rte_mempool_cache_free(struct rte_mempool_cache *cache);
+
+/**
+ * Flush a user-owned mempool cache to the specified mempool.
+ *
+ * @param cache
+ * A pointer to the mempool cache.
+ * @param mp
+ * A pointer to the mempool.
+ */
+static inline void __attribute__((always_inline))
+rte_mempool_cache_flush(struct rte_mempool_cache *cache,
+ struct rte_mempool *mp)
+{
+ rte_mempool_ops_enqueue_bulk(mp, cache->objs, cache->len);
+ cache->len = 0;
+}
+
+/**
+ * Get a pointer to the per-lcore default mempool cache.
+ *
+ * @param mp
+ * A pointer to the mempool structure.
+ * @param lcore_id
+ * The logical core id.
+ * @return
+ * A pointer to the mempool cache or NULL if disabled or non-EAL thread.
+ */
+static inline struct rte_mempool_cache *__attribute__((always_inline))
+rte_mempool_default_cache(struct rte_mempool *mp, unsigned lcore_id)
+{
+ if (mp->cache_size == 0)
+ return NULL;
+
+ if (lcore_id >= RTE_MAX_LCORE)
+ return NULL;
+
+ return &mp->local_cache[lcore_id];
+}
+
/**
* @internal Put several objects back in the mempool; used internally.
* @param mp
* @param n
* The number of objects to store back in the mempool, must be strictly
* positive.
- * @param is_mp
- * Mono-producer (0) or multi-producers (1).
+ * @param cache
+ * A pointer to a mempool cache structure. May be NULL if not needed.
+ * @param flags
+ * The flags used for the mempool creation.
+ * Single-producer (MEMPOOL_F_SP_PUT flag) or multi-producers.
*/
static inline void __attribute__((always_inline))
__mempool_generic_put(struct rte_mempool *mp, void * const *obj_table,
- unsigned n, int is_mp)
+ unsigned n, struct rte_mempool_cache *cache, int flags)
{
- struct rte_mempool_cache *cache;
- uint32_t index;
void **cache_objs;
- unsigned lcore_id = rte_lcore_id();
- uint32_t cache_size = mp->cache_size;
- uint32_t flushthresh = mp->cache_flushthresh;
/* increment stat now, adding in mempool always success */
__MEMPOOL_STAT_ADD(mp, put, n);
- /* cache is not enabled or single producer or non-EAL thread */
- if (unlikely(cache_size == 0 || is_mp == 0 ||
- lcore_id >= RTE_MAX_LCORE))
+ /* No cache provided or single producer */
+ if (unlikely(cache == NULL || flags & MEMPOOL_F_SP_PUT))
goto ring_enqueue;
/* Go straight to ring if put would overflow mem allocated for cache */
if (unlikely(n > RTE_MEMPOOL_CACHE_MAX_SIZE))
goto ring_enqueue;
- cache = &mp->local_cache[lcore_id];
cache_objs = &cache->objs[cache->len];
/*
*/
/* Add elements back into the cache */
- for (index = 0; index < n; ++index, obj_table++)
- cache_objs[index] = *obj_table;
+ rte_memcpy(&cache_objs[0], obj_table, sizeof(void *) * n);
cache->len += n;
- if (cache->len >= flushthresh) {
- rte_mempool_ops_enqueue_bulk(mp, &cache->objs[cache_size],
- cache->len - cache_size);
- cache->len = cache_size;
+ if (cache->len >= cache->flushthresh) {
+ rte_mempool_ops_enqueue_bulk(mp, &cache->objs[cache->size],
+ cache->len - cache->size);
+ cache->len = cache->size;
}
return;
* A pointer to a table of void * pointers (objects).
* @param n
* The number of objects to add in the mempool from the obj_table.
- * @param is_mp
- * Mono-producer (0) or multi-producers (1).
+ * @param cache
+ * A pointer to a mempool cache structure. May be NULL if not needed.
+ * @param flags
+ * The flags used for the mempool creation.
+ * Single-producer (MEMPOOL_F_SP_PUT flag) or multi-producers.
*/
static inline void __attribute__((always_inline))
rte_mempool_generic_put(struct rte_mempool *mp, void * const *obj_table,
- unsigned n, int is_mp)
+ unsigned n, struct rte_mempool_cache *cache, int flags)
{
__mempool_check_cookies(mp, obj_table, n, 0);
- __mempool_generic_put(mp, obj_table, n, is_mp);
+ __mempool_generic_put(mp, obj_table, n, cache, flags);
}
/**
rte_mempool_mp_put_bulk(struct rte_mempool *mp, void * const *obj_table,
unsigned n)
{
- rte_mempool_generic_put(mp, obj_table, n, 1);
+ struct rte_mempool_cache *cache;
+ cache = rte_mempool_default_cache(mp, rte_lcore_id());
+ rte_mempool_generic_put(mp, obj_table, n, cache, 0);
}
/**
rte_mempool_sp_put_bulk(struct rte_mempool *mp, void * const *obj_table,
unsigned n)
{
- rte_mempool_generic_put(mp, obj_table, n, 0);
+ rte_mempool_generic_put(mp, obj_table, n, NULL, MEMPOOL_F_SP_PUT);
}
/**
rte_mempool_put_bulk(struct rte_mempool *mp, void * const *obj_table,
unsigned n)
{
- rte_mempool_generic_put(mp, obj_table, n,
- !(mp->flags & MEMPOOL_F_SP_PUT));
+ struct rte_mempool_cache *cache;
+ cache = rte_mempool_default_cache(mp, rte_lcore_id());
+ rte_mempool_generic_put(mp, obj_table, n, cache, mp->flags);
}
/**
static inline void __attribute__((always_inline))
rte_mempool_mp_put(struct rte_mempool *mp, void *obj)
{
- rte_mempool_generic_put(mp, &obj, 1, 1);
+ struct rte_mempool_cache *cache;
+ cache = rte_mempool_default_cache(mp, rte_lcore_id());
+ rte_mempool_generic_put(mp, &obj, 1, cache, 0);
}
/**
static inline void __attribute__((always_inline))
rte_mempool_sp_put(struct rte_mempool *mp, void *obj)
{
- rte_mempool_generic_put(mp, &obj, 1, 0);
+ rte_mempool_generic_put(mp, &obj, 1, NULL, MEMPOOL_F_SP_PUT);
}
/**
* A pointer to a table of void * pointers (objects).
* @param n
* The number of objects to get, must be strictly positive.
- * @param is_mc
- * Mono-consumer (0) or multi-consumers (1).
+ * @param cache
+ * A pointer to a mempool cache structure. May be NULL if not needed.
+ * @param flags
+ * The flags used for the mempool creation.
+ * Single-consumer (MEMPOOL_F_SC_GET flag) or multi-consumers.
* @return
* - >=0: Success; number of objects supplied.
* - <0: Error; code of ring dequeue function.
*/
static inline int __attribute__((always_inline))
__mempool_generic_get(struct rte_mempool *mp, void **obj_table,
- unsigned n, int is_mc)
+ unsigned n, struct rte_mempool_cache *cache, int flags)
{
int ret;
- struct rte_mempool_cache *cache;
uint32_t index, len;
void **cache_objs;
- unsigned lcore_id = rte_lcore_id();
- uint32_t cache_size = mp->cache_size;
- /* cache is not enabled or single consumer */
- if (unlikely(cache_size == 0 || is_mc == 0 ||
- n >= cache_size || lcore_id >= RTE_MAX_LCORE))
+ /* No cache provided or single consumer */
+ if (unlikely(cache == NULL || flags & MEMPOOL_F_SC_GET ||
+ n >= cache->size))
goto ring_dequeue;
- cache = &mp->local_cache[lcore_id];
cache_objs = cache->objs;
/* Can this be satisfied from the cache? */
if (cache->len < n) {
/* No. Backfill the cache first, and then fill from it */
- uint32_t req = n + (cache_size - cache->len);
+ uint32_t req = n + (cache->size - cache->len);
/* How many do we require i.e. number to fill the cache + the request */
ret = rte_mempool_ops_dequeue_bulk(mp,
* A pointer to a table of void * pointers (objects) that will be filled.
* @param n
* The number of objects to get from mempool to obj_table.
- * @param is_mc
- * Mono-consumer (0) or multi-consumers (1).
+ * @param cache
+ * A pointer to a mempool cache structure. May be NULL if not needed.
+ * @param flags
+ * The flags used for the mempool creation.
+ * Single-consumer (MEMPOOL_F_SC_GET flag) or multi-consumers.
* @return
* - 0: Success; objects taken.
* - -ENOENT: Not enough entries in the mempool; no object is retrieved.
*/
static inline int __attribute__((always_inline))
rte_mempool_generic_get(struct rte_mempool *mp, void **obj_table, unsigned n,
- int is_mc)
+ struct rte_mempool_cache *cache, int flags)
{
int ret;
- ret = __mempool_generic_get(mp, obj_table, n, is_mc);
+ ret = __mempool_generic_get(mp, obj_table, n, cache, flags);
if (ret == 0)
__mempool_check_cookies(mp, obj_table, n, 1);
return ret;
static inline int __attribute__((always_inline))
rte_mempool_mc_get_bulk(struct rte_mempool *mp, void **obj_table, unsigned n)
{
- return rte_mempool_generic_get(mp, obj_table, n, 1);
+ struct rte_mempool_cache *cache;
+ cache = rte_mempool_default_cache(mp, rte_lcore_id());
+ return rte_mempool_generic_get(mp, obj_table, n, cache, 0);
}
/**
static inline int __attribute__((always_inline))
rte_mempool_sc_get_bulk(struct rte_mempool *mp, void **obj_table, unsigned n)
{
- return rte_mempool_generic_get(mp, obj_table, n, 0);
+ return rte_mempool_generic_get(mp, obj_table, n, NULL,
+ MEMPOOL_F_SC_GET);
}
/**
static inline int __attribute__((always_inline))
rte_mempool_get_bulk(struct rte_mempool *mp, void **obj_table, unsigned n)
{
- return rte_mempool_generic_get(mp, obj_table, n,
- !(mp->flags & MEMPOOL_F_SC_GET));
+ struct rte_mempool_cache *cache;
+ cache = rte_mempool_default_cache(mp, rte_lcore_id());
+ return rte_mempool_generic_get(mp, obj_table, n, cache, mp->flags);
}
/**
static inline int __attribute__((always_inline))
rte_mempool_mc_get(struct rte_mempool *mp, void **obj_p)
{
- return rte_mempool_generic_get(mp, obj_p, 1, 1);
+ struct rte_mempool_cache *cache;
+ cache = rte_mempool_default_cache(mp, rte_lcore_id());
+ return rte_mempool_generic_get(mp, obj_p, 1, cache, 0);
}
/**
static inline int __attribute__((always_inline))
rte_mempool_sc_get(struct rte_mempool *mp, void **obj_p)
{
- return rte_mempool_generic_get(mp, obj_p, 1, 0);
+ return rte_mempool_generic_get(mp, obj_p, 1, NULL, MEMPOOL_F_SC_GET);
}
/**
}
/**
+ * Return the number of entries in the mempool.
+ *
+ * When cache is enabled, this function has to browse the length of
+ * all lcores, so it should not be used in a data path, but only for
+ * debug purposes. User-owned mempool caches are not accounted for.
+ *
+ * @param mp
+ * A pointer to the mempool structure.
+ * @return
+ * The number of entries in the mempool.
+ */
+unsigned int rte_mempool_avail_count(const struct rte_mempool *mp);
+
+/**
+ * @deprecated
* Return the number of entries in the mempool.
*
* When cache is enabled, this function has to browse the length of
* @return
* The number of entries in the mempool.
*/
+__rte_deprecated
unsigned rte_mempool_count(const struct rte_mempool *mp);
/**
+ * Return the number of elements which have been allocated from the mempool
+ *
+ * When cache is enabled, this function has to browse the length of
+ * all lcores, so it should not be used in a data path, but only for
+ * debug purposes.
+ *
+ * @param mp
+ * A pointer to the mempool structure.
+ * @return
+ * The number of free entries in the mempool.
+ */
+unsigned int
+rte_mempool_in_use_count(const struct rte_mempool *mp);
+
+/**
+ * @deprecated
* Return the number of free entries in the mempool ring.
* i.e. how many entries can be freed back to the mempool.
*
*
* When cache is enabled, this function has to browse the length of
* all lcores, so it should not be used in a data path, but only for
- * debug purposes.
+ * debug purposes. User-owned mempool caches are not accounted for.
*
* @param mp
* A pointer to the mempool structure.
* @return
* The number of free entries in the mempool.
*/
+__rte_deprecated
static inline unsigned
rte_mempool_free_count(const struct rte_mempool *mp)
{
- return mp->size - rte_mempool_count(mp);
+ return rte_mempool_in_use_count(mp);
}
/**
*
* When cache is enabled, this function has to browse the length of all
* lcores, so it should not be used in a data path, but only for debug
- * purposes.
+ * purposes. User-owned mempool caches are not accounted for.
*
* @param mp
* A pointer to the mempool structure.
static inline int
rte_mempool_full(const struct rte_mempool *mp)
{
- return !!(rte_mempool_count(mp) == mp->size);
+ return !!(rte_mempool_avail_count(mp) == mp->size);
}
/**
*
* When cache is enabled, this function has to browse the length of all
* lcores, so it should not be used in a data path, but only for debug
- * purposes.
+ * purposes. User-owned mempool caches are not accounted for.
*
* @param mp
* A pointer to the mempool structure.
static inline int
rte_mempool_empty(const struct rte_mempool *mp)
{
- return !!(rte_mempool_count(mp) == 0);
+ return !!(rte_mempool_avail_count(mp) == 0);
}
/**