examples/l2fwd-keepalive: skip meson build if no librt

[dpdk.git] / lib / librte_hash / rte_cuckoo_hash.h

diff --git a/lib/librte_hash/rte_cuckoo_hash.h b/lib/librte_hash/rte_cuckoo_hash.h
index 0548c97..85be49d 100644 (file)
--- a/lib/librte_hash/rte_cuckoo_hash.h
+++ b/lib/librte_hash/rte_cuckoo_hash.h
@@ -124,7 +124,7 @@ const rte_hash_cmp_eq_t cmp_jump_table[NUM_KEY_CMP_CASES] = {
 
 struct lcore_cache {
        unsigned len; /**< Cache len */
-       void *objs[LCORE_CACHE_SIZE]; /**< Cache objects */
+       uint32_t objs[LCORE_CACHE_SIZE]; /**< Cache objects */
 } __rte_cache_aligned;
 
 /* Structure that stores key-value pair */
@@ -168,6 +168,11 @@ struct rte_hash {
        struct lcore_cache *local_free_slots;
        /**< Local cache per lcore, storing some indexes of the free slots */
 
+       /* RCU config */
+       struct rte_hash_rcu_config *hash_rcu_cfg;
+       /**< HASH RCU QSBR configuration structure */
+       struct rte_rcu_qsbr_dq *dq;     /**< RCU QSBR defer queue. */
+
        /* Fields used in lookup */
 
        uint32_t key_len __rte_cache_aligned;
@@ -211,6 +216,13 @@ struct rte_hash {
        rte_rwlock_t *readwrite_lock; /**< Read-write lock thread-safety. */
        struct rte_hash_bucket *buckets_ext; /**< Extra buckets array */
        struct rte_ring *free_ext_bkts; /**< Ring of indexes of free buckets */
+       /* Stores index of an empty ext bkt to be recycled on calling
+        * rte_hash_del_xxx APIs. When lock free read-write concurrency is
+        * enabled, an empty ext bkt cannot be put into free list immediately
+        * (as readers might be using it still). Hence freeing of the ext bkt
+        * is piggy-backed to freeing of the key index.
+        */
+       uint32_t *ext_bkt_to_free;
        uint32_t *tbl_chng_cnt;
        /**< Indicates if the hash table changed from last read. */
 } __rte_cache_aligned;
@@ -223,4 +235,7 @@ struct queue_node {
        int prev_slot;               /* Parent(slot) in search path */
 };
 
+/** @internal Default RCU defer queue entries to reclaim in one go. */
+#define RTE_HASH_RCU_DQ_RECLAIM_MAX    16
+
 #endif