From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pablo de Lara Subject: [PATCH 1/3] hash: reorganize bucket structure Date: Fri, 26 Aug 2016 22:34:45 +0100 Message-ID: <1472247287-167011-2-git-send-email-pablo.de.lara.guarch@intel.com> References: <1472247287-167011-1-git-send-email-pablo.de.lara.guarch@intel.com> Cc: bruce.richardson@intel.com, Byron Marohn , Saikrishna Edupuganti To: dev@dpdk.org Return-path: Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by dpdk.org (Postfix) with ESMTP id 7B09D58C5 for ; Fri, 26 Aug 2016 23:33:57 +0200 (CEST) In-Reply-To: <1472247287-167011-1-git-send-email-pablo.de.lara.guarch@intel.com> List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" From: Byron Marohn Move current signatures of all entries together in the bucket and same with all alternative signatures, instead of having current and alternative signatures together per entry in the bucket. This will be benefitial in the next commits, where a vectorized comparison will be performed, achieving better performance. Signed-off-by: Byron Marohn Signed-off-by: Saikrishna Edupuganti --- lib/librte_hash/rte_cuckoo_hash.c | 43 ++++++++++++++++++----------------- lib/librte_hash/rte_cuckoo_hash.h | 17 ++++---------- lib/librte_hash/rte_cuckoo_hash_x86.h | 20 ++++++++-------- 3 files changed, 37 insertions(+), 43 deletions(-) diff --git a/lib/librte_hash/rte_cuckoo_hash.c b/lib/librte_hash/rte_cuckoo_hash.c index dd0290f..9d507b6 100644 --- a/lib/librte_hash/rte_cuckoo_hash.c +++ b/lib/librte_hash/rte_cuckoo_hash.c @@ -420,7 +420,7 @@ make_space_bucket(const struct rte_hash *h, struct rte_hash_bucket *bkt) */ for (i = 0; i < RTE_HASH_BUCKET_ENTRIES; i++) { /* Search for space in alternative locations */ - next_bucket_idx = bkt->signatures[i].alt & h->bucket_bitmask; + next_bucket_idx = bkt->sig_alt[i] & h->bucket_bitmask; next_bkt[i] = &h->buckets[next_bucket_idx]; for (j = 0; j < RTE_HASH_BUCKET_ENTRIES; j++) { if (next_bkt[i]->key_idx[j] == EMPTY_SLOT) @@ -433,8 +433,8 @@ make_space_bucket(const struct rte_hash *h, struct rte_hash_bucket *bkt) /* Alternative location has spare room (end of recursive function) */ if (i != RTE_HASH_BUCKET_ENTRIES) { - next_bkt[i]->signatures[j].alt = bkt->signatures[i].current; - next_bkt[i]->signatures[j].current = bkt->signatures[i].alt; + next_bkt[i]->sig_alt[j] = bkt->sig_current[i]; + next_bkt[i]->sig_current[j] = bkt->sig_alt[i]; next_bkt[i]->key_idx[j] = bkt->key_idx[i]; return i; } @@ -460,8 +460,8 @@ make_space_bucket(const struct rte_hash *h, struct rte_hash_bucket *bkt) */ bkt->flag[i] = 0; if (ret >= 0) { - next_bkt[i]->signatures[ret].alt = bkt->signatures[i].current; - next_bkt[i]->signatures[ret].current = bkt->signatures[i].alt; + next_bkt[i]->sig_alt[ret] = bkt->sig_current[i]; + next_bkt[i]->sig_current[ret] = bkt->sig_alt[i]; next_bkt[i]->key_idx[ret] = bkt->key_idx[i]; return i; } else @@ -543,8 +543,8 @@ __rte_hash_add_key_with_hash(const struct rte_hash *h, const void *key, /* Check if key is already inserted in primary location */ for (i = 0; i < RTE_HASH_BUCKET_ENTRIES; i++) { - if (prim_bkt->signatures[i].current == sig && - prim_bkt->signatures[i].alt == alt_hash) { + if (prim_bkt->sig_current[i] == sig && + prim_bkt->sig_alt[i] == alt_hash) { k = (struct rte_hash_key *) ((char *)keys + prim_bkt->key_idx[i] * h->key_entry_size); if (rte_hash_cmp_eq(key, k->key, h) == 0) { @@ -563,8 +563,8 @@ __rte_hash_add_key_with_hash(const struct rte_hash *h, const void *key, /* Check if key is already inserted in secondary location */ for (i = 0; i < RTE_HASH_BUCKET_ENTRIES; i++) { - if (sec_bkt->signatures[i].alt == sig && - sec_bkt->signatures[i].current == alt_hash) { + if (sec_bkt->sig_alt[i] == sig && + sec_bkt->sig_current[i] == alt_hash) { k = (struct rte_hash_key *) ((char *)keys + sec_bkt->key_idx[i] * h->key_entry_size); if (rte_hash_cmp_eq(key, k->key, h) == 0) { @@ -610,8 +610,8 @@ __rte_hash_add_key_with_hash(const struct rte_hash *h, const void *key, for (i = 0; i < RTE_HASH_BUCKET_ENTRIES; i++) { /* Check if slot is available */ if (likely(prim_bkt->key_idx[i] == EMPTY_SLOT)) { - prim_bkt->signatures[i].current = sig; - prim_bkt->signatures[i].alt = alt_hash; + prim_bkt->sig_current[i] = sig; + prim_bkt->sig_alt[i] = alt_hash; prim_bkt->key_idx[i] = new_idx; break; } @@ -631,8 +631,8 @@ __rte_hash_add_key_with_hash(const struct rte_hash *h, const void *key, */ ret = make_space_bucket(h, prim_bkt); if (ret >= 0) { - prim_bkt->signatures[ret].current = sig; - prim_bkt->signatures[ret].alt = alt_hash; + prim_bkt->sig_current[ret] = sig; + prim_bkt->sig_alt[ret] = alt_hash; prim_bkt->key_idx[ret] = new_idx; if (h->add_key == ADD_KEY_MULTIWRITER) rte_spinlock_unlock(h->multiwriter_lock); @@ -706,7 +706,7 @@ __rte_hash_lookup_with_hash(const struct rte_hash *h, const void *key, /* Check if key is in primary location */ for (i = 0; i < RTE_HASH_BUCKET_ENTRIES; i++) { - if (bkt->signatures[i].current == sig && + if (bkt->sig_current[i] == sig && bkt->key_idx[i] != EMPTY_SLOT) { k = (struct rte_hash_key *) ((char *)keys + bkt->key_idx[i] * h->key_entry_size); @@ -729,8 +729,8 @@ __rte_hash_lookup_with_hash(const struct rte_hash *h, const void *key, /* Check if key is in secondary location */ for (i = 0; i < RTE_HASH_BUCKET_ENTRIES; i++) { - if (bkt->signatures[i].current == alt_hash && - bkt->signatures[i].alt == sig) { + if (bkt->sig_current[i] == alt_hash && + bkt->sig_alt[i] == sig) { k = (struct rte_hash_key *) ((char *)keys + bkt->key_idx[i] * h->key_entry_size); if (rte_hash_cmp_eq(key, k->key, h) == 0) { @@ -784,7 +784,8 @@ remove_entry(const struct rte_hash *h, struct rte_hash_bucket *bkt, unsigned i) unsigned lcore_id, n_slots; struct lcore_cache *cached_free_slots; - bkt->signatures[i].sig = NULL_SIGNATURE; + bkt->sig_current[i] = NULL_SIGNATURE; + bkt->sig_alt[i] = NULL_SIGNATURE; if (h->hw_trans_mem_support) { lcore_id = rte_lcore_id(); cached_free_slots = &h->local_free_slots[lcore_id]; @@ -822,7 +823,7 @@ __rte_hash_del_key_with_hash(const struct rte_hash *h, const void *key, /* Check if key is in primary location */ for (i = 0; i < RTE_HASH_BUCKET_ENTRIES; i++) { - if (bkt->signatures[i].current == sig && + if (bkt->sig_current[i] == sig && bkt->key_idx[i] != EMPTY_SLOT) { k = (struct rte_hash_key *) ((char *)keys + bkt->key_idx[i] * h->key_entry_size); @@ -847,7 +848,7 @@ __rte_hash_del_key_with_hash(const struct rte_hash *h, const void *key, /* Check if key is in secondary location */ for (i = 0; i < RTE_HASH_BUCKET_ENTRIES; i++) { - if (bkt->signatures[i].current == alt_hash && + if (bkt->sig_current[i] == alt_hash && bkt->key_idx[i] != EMPTY_SLOT) { k = (struct rte_hash_key *) ((char *)keys + bkt->key_idx[i] * h->key_entry_size); @@ -956,8 +957,8 @@ lookup_stage2(unsigned idx, hash_sig_t prim_hash, hash_sig_t sec_hash, prim_hash_matches = 1 << RTE_HASH_BUCKET_ENTRIES; sec_hash_matches = 1 << RTE_HASH_BUCKET_ENTRIES; for (i = 0; i < RTE_HASH_BUCKET_ENTRIES; i++) { - prim_hash_matches |= ((prim_hash == prim_bkt->signatures[i].current) << i); - sec_hash_matches |= ((sec_hash == sec_bkt->signatures[i].current) << i); + prim_hash_matches |= ((prim_hash == prim_bkt->sig_current[i]) << i); + sec_hash_matches |= ((sec_hash == sec_bkt->sig_current[i]) << i); } key_idx = prim_bkt->key_idx[__builtin_ctzl(prim_hash_matches)]; diff --git a/lib/librte_hash/rte_cuckoo_hash.h b/lib/librte_hash/rte_cuckoo_hash.h index e290dab..fe0654f 100644 --- a/lib/librte_hash/rte_cuckoo_hash.h +++ b/lib/librte_hash/rte_cuckoo_hash.h @@ -151,17 +151,6 @@ struct lcore_cache { void *objs[LCORE_CACHE_SIZE]; /**< Cache objects */ } __rte_cache_aligned; -/* Structure storing both primary and secondary hashes */ -struct rte_hash_signatures { - union { - struct { - hash_sig_t current; - hash_sig_t alt; - }; - uint64_t sig; - }; -}; - /* Structure that stores key-value pair */ struct rte_hash_key { union { @@ -174,10 +163,14 @@ struct rte_hash_key { /** Bucket structure */ struct rte_hash_bucket { - struct rte_hash_signatures signatures[RTE_HASH_BUCKET_ENTRIES]; + hash_sig_t sig_current[RTE_HASH_BUCKET_ENTRIES]; + /* Includes dummy key index that always contains index 0 */ uint32_t key_idx[RTE_HASH_BUCKET_ENTRIES + 1]; + uint8_t flag[RTE_HASH_BUCKET_ENTRIES]; + + hash_sig_t sig_alt[RTE_HASH_BUCKET_ENTRIES]; } __rte_cache_aligned; /** A hash table structure. */ diff --git a/lib/librte_hash/rte_cuckoo_hash_x86.h b/lib/librte_hash/rte_cuckoo_hash_x86.h index e16d69c..494c160 100644 --- a/lib/librte_hash/rte_cuckoo_hash_x86.h +++ b/lib/librte_hash/rte_cuckoo_hash_x86.h @@ -54,8 +54,8 @@ rte_hash_cuckoo_insert_mw_tm(struct rte_hash_bucket *prim_bkt, for (i = 0; i < RTE_HASH_BUCKET_ENTRIES; i++) { /* Check if slot is available */ if (likely(prim_bkt->key_idx == EMPTY_SLOT)) { - prim_bkt->signatures[i].current = sig; - prim_bkt->signatures[i].alt = alt_hash; + prim_bkt->sig_current[i] = sig; + prim_bkt->sig_alt[i] = alt_hash; prim_bkt->key_idx[i] = new_idx; break; } @@ -101,7 +101,7 @@ rte_hash_cuckoo_move_insert_mw_tm(const struct rte_hash *h, prev_slot = curr_node->prev_slot; prev_alt_bkt_idx - = prev_bkt->signatures[prev_slot].alt + = prev_bkt->sig_alt[prev_slot] & h->bucket_bitmask; if (unlikely(&h->buckets[prev_alt_bkt_idx] @@ -113,10 +113,10 @@ rte_hash_cuckoo_move_insert_mw_tm(const struct rte_hash *h, * Cuckoo insert to move elements back to its * primary bucket if available */ - curr_bkt->signatures[curr_slot].alt = - prev_bkt->signatures[prev_slot].current; - curr_bkt->signatures[curr_slot].current = - prev_bkt->signatures[prev_slot].alt; + curr_bkt->sig_alt[curr_slot] = + prev_bkt->sig_current[prev_slot]; + curr_bkt->sig_current[curr_slot] = + prev_bkt->sig_alt[prev_slot]; curr_bkt->key_idx[curr_slot] = prev_bkt->key_idx[prev_slot]; @@ -125,8 +125,8 @@ rte_hash_cuckoo_move_insert_mw_tm(const struct rte_hash *h, curr_bkt = curr_node->bkt; } - curr_bkt->signatures[curr_slot].current = sig; - curr_bkt->signatures[curr_slot].alt = alt_hash; + curr_bkt->sig_current[curr_slot] = sig; + curr_bkt->sig_alt[curr_slot] = alt_hash; curr_bkt->key_idx[curr_slot] = new_idx; rte_xend(); @@ -178,7 +178,7 @@ rte_hash_cuckoo_make_space_mw_tm(const struct rte_hash *h, } /* Enqueue new node and keep prev node info */ - alt_bkt = &(h->buckets[curr_bkt->signatures[i].alt + alt_bkt = &(h->buckets[curr_bkt->sig_alt[i] & h->bucket_bitmask]); head->bkt = alt_bkt; head->prev = tail; -- 2.7.4