diff options
Diffstat (limited to 'lib/librte_table/rte_table_hash_lru.c')
| -rw-r--r-- | lib/librte_table/rte_table_hash_lru.c | 1102 |
1 files changed, 1102 insertions, 0 deletions
diff --git a/lib/librte_table/rte_table_hash_lru.c b/lib/librte_table/rte_table_hash_lru.c new file mode 100644 index 00000000..407c62ab --- /dev/null +++ b/lib/librte_table/rte_table_hash_lru.c @@ -0,0 +1,1102 @@ +/*- + * BSD LICENSE + * + * Copyright(c) 2010-2014 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <string.h> +#include <stdio.h> + +#include <rte_common.h> +#include <rte_mbuf.h> +#include <rte_memory.h> +#include <rte_malloc.h> +#include <rte_log.h> + +#include "rte_table_hash.h" +#include "rte_lru.h" + +#define KEYS_PER_BUCKET 4 + +#ifdef RTE_TABLE_STATS_COLLECT + +#define RTE_TABLE_HASH_LRU_STATS_PKTS_IN_ADD(table, val) \ + table->stats.n_pkts_in += val +#define RTE_TABLE_HASH_LRU_STATS_PKTS_LOOKUP_MISS(table, val) \ + table->stats.n_pkts_lookup_miss += val + +#else + +#define RTE_TABLE_HASH_LRU_STATS_PKTS_IN_ADD(table, val) +#define RTE_TABLE_HASH_LRU_STATS_PKTS_LOOKUP_MISS(table, val) + +#endif + +struct bucket { + union { + struct bucket *next; + uint64_t lru_list; + }; + uint16_t sig[KEYS_PER_BUCKET]; + uint32_t key_pos[KEYS_PER_BUCKET]; +}; + +struct grinder { + struct bucket *bkt; + uint64_t sig; + uint64_t match; + uint64_t match_pos; + uint32_t key_index; +}; + +struct rte_table_hash { + struct rte_table_stats stats; + + /* Input parameters */ + uint32_t key_size; + uint32_t entry_size; + uint32_t n_keys; + uint32_t n_buckets; + rte_table_hash_op_hash f_hash; + uint64_t seed; + uint32_t signature_offset; + uint32_t key_offset; + + /* Internal */ + uint64_t bucket_mask; + uint32_t key_size_shl; + uint32_t data_size_shl; + uint32_t key_stack_tos; + + /* Grinder */ + struct grinder grinders[RTE_PORT_IN_BURST_SIZE_MAX]; + + /* Tables */ + struct bucket *buckets; + uint8_t *key_mem; + uint8_t *data_mem; + uint32_t *key_stack; + + /* Table memory */ + uint8_t memory[0] __rte_cache_aligned; +}; + +static int +check_params_create(struct rte_table_hash_lru_params *params) +{ + uint32_t n_buckets_min; + + /* key_size */ + if ((params->key_size == 0) || + (!rte_is_power_of_2(params->key_size))) { + RTE_LOG(ERR, TABLE, "%s: key_size invalid value\n", __func__); + return -EINVAL; + } + + /* n_keys */ + if ((params->n_keys == 0) || + (!rte_is_power_of_2(params->n_keys))) { + RTE_LOG(ERR, TABLE, "%s: n_keys invalid value\n", __func__); + return -EINVAL; + } + + /* n_buckets */ + n_buckets_min = (params->n_keys + KEYS_PER_BUCKET - 1) / params->n_keys; + if ((params->n_buckets == 0) || + (!rte_is_power_of_2(params->n_keys)) || + (params->n_buckets < n_buckets_min)) { + RTE_LOG(ERR, TABLE, "%s: n_buckets invalid value\n", __func__); + return -EINVAL; + } + + /* f_hash */ + if (params->f_hash == NULL) { + RTE_LOG(ERR, TABLE, "%s: f_hash invalid value\n", __func__); + return -EINVAL; + } + + return 0; +} + +static void * +rte_table_hash_lru_create(void *params, int socket_id, uint32_t entry_size) +{ + struct rte_table_hash_lru_params *p = + (struct rte_table_hash_lru_params *) params; + struct rte_table_hash *t; + uint32_t total_size, table_meta_sz; + uint32_t bucket_sz, key_sz, key_stack_sz, data_sz; + uint32_t bucket_offset, key_offset, key_stack_offset, data_offset; + uint32_t i; + + /* Check input parameters */ + if ((check_params_create(p) != 0) || + (!rte_is_power_of_2(entry_size)) || + ((sizeof(struct rte_table_hash) % RTE_CACHE_LINE_SIZE) != 0) || + (sizeof(struct bucket) != (RTE_CACHE_LINE_SIZE / 2))) { + return NULL; + } + + /* Memory allocation */ + table_meta_sz = RTE_CACHE_LINE_ROUNDUP(sizeof(struct rte_table_hash)); + bucket_sz = RTE_CACHE_LINE_ROUNDUP(p->n_buckets * sizeof(struct bucket)); + key_sz = RTE_CACHE_LINE_ROUNDUP(p->n_keys * p->key_size); + key_stack_sz = RTE_CACHE_LINE_ROUNDUP(p->n_keys * sizeof(uint32_t)); + data_sz = RTE_CACHE_LINE_ROUNDUP(p->n_keys * entry_size); + total_size = table_meta_sz + bucket_sz + key_sz + key_stack_sz + + data_sz; + + t = rte_zmalloc_socket("TABLE", total_size, RTE_CACHE_LINE_SIZE, socket_id); + if (t == NULL) { + RTE_LOG(ERR, TABLE, + "%s: Cannot allocate %u bytes for hash table\n", + __func__, total_size); + return NULL; + } + RTE_LOG(INFO, TABLE, "%s (%u-byte key): Hash table memory footprint is " + "%u bytes\n", __func__, p->key_size, total_size); + + /* Memory initialization */ + t->key_size = p->key_size; + t->entry_size = entry_size; + t->n_keys = p->n_keys; + t->n_buckets = p->n_buckets; + t->f_hash = p->f_hash; + t->seed = p->seed; + t->signature_offset = p->signature_offset; + t->key_offset = p->key_offset; + + /* Internal */ + t->bucket_mask = t->n_buckets - 1; + t->key_size_shl = __builtin_ctzl(p->key_size); + t->data_size_shl = __builtin_ctzl(entry_size); + + /* Tables */ + bucket_offset = 0; + key_offset = bucket_offset + bucket_sz; + key_stack_offset = key_offset + key_sz; + data_offset = key_stack_offset + key_stack_sz; + + t->buckets = (struct bucket *) &t->memory[bucket_offset]; + t->key_mem = &t->memory[key_offset]; + t->key_stack = (uint32_t *) &t->memory[key_stack_offset]; + t->data_mem = &t->memory[data_offset]; + + /* Key stack */ + for (i = 0; i < t->n_keys; i++) + t->key_stack[i] = t->n_keys - 1 - i; + t->key_stack_tos = t->n_keys; + + /* LRU */ + for (i = 0; i < t->n_buckets; i++) { + struct bucket *bkt = &t->buckets[i]; + + lru_init(bkt); + } + + return t; +} + +static int +rte_table_hash_lru_free(void *table) +{ + struct rte_table_hash *t = (struct rte_table_hash *) table; + + /* Check input parameters */ + if (t == NULL) + return -EINVAL; + + rte_free(t); + return 0; +} + +static int +rte_table_hash_lru_entry_add(void *table, void *key, void *entry, + int *key_found, void **entry_ptr) +{ + struct rte_table_hash *t = (struct rte_table_hash *) table; + struct bucket *bkt; + uint64_t sig; + uint32_t bkt_index, i; + + sig = t->f_hash(key, t->key_size, t->seed); + bkt_index = sig & t->bucket_mask; + bkt = &t->buckets[bkt_index]; + sig = (sig >> 16) | 1LLU; + + /* Key is present in the bucket */ + for (i = 0; i < KEYS_PER_BUCKET; i++) { + uint64_t bkt_sig = (uint64_t) bkt->sig[i]; + uint32_t bkt_key_index = bkt->key_pos[i]; + uint8_t *bkt_key = &t->key_mem[bkt_key_index << + t->key_size_shl]; + + if ((sig == bkt_sig) && (memcmp(key, bkt_key, t->key_size) + == 0)) { + uint8_t *data = &t->data_mem[bkt_key_index << + t->data_size_shl]; + + memcpy(data, entry, t->entry_size); + lru_update(bkt, i); + *key_found = 1; + *entry_ptr = (void *) data; + return 0; + } + } + + /* Key is not present in the bucket */ + for (i = 0; i < KEYS_PER_BUCKET; i++) { + uint64_t bkt_sig = (uint64_t) bkt->sig[i]; + + if (bkt_sig == 0) { + uint32_t bkt_key_index; + uint8_t *bkt_key, *data; + + /* Allocate new key */ + if (t->key_stack_tos == 0) { + /* No keys available */ + return -ENOSPC; + } + bkt_key_index = t->key_stack[--t->key_stack_tos]; + + /* Install new key */ + bkt_key = &t->key_mem[bkt_key_index << t->key_size_shl]; + data = &t->data_mem[bkt_key_index << t->data_size_shl]; + + bkt->sig[i] = (uint16_t) sig; + bkt->key_pos[i] = bkt_key_index; + memcpy(bkt_key, key, t->key_size); + memcpy(data, entry, t->entry_size); + lru_update(bkt, i); + + *key_found = 0; + *entry_ptr = (void *) data; + return 0; + } + } + + /* Bucket full */ + { + uint64_t pos = lru_pos(bkt); + uint32_t bkt_key_index = bkt->key_pos[pos]; + uint8_t *bkt_key = &t->key_mem[bkt_key_index << + t->key_size_shl]; + uint8_t *data = &t->data_mem[bkt_key_index << t->data_size_shl]; + + bkt->sig[pos] = (uint16_t) sig; + memcpy(bkt_key, key, t->key_size); + memcpy(data, entry, t->entry_size); + lru_update(bkt, pos); + + *key_found = 0; + *entry_ptr = (void *) data; + return 0; + } +} + +static int +rte_table_hash_lru_entry_delete(void *table, void *key, int *key_found, + void *entry) +{ + struct rte_table_hash *t = (struct rte_table_hash *) table; + struct bucket *bkt; + uint64_t sig; + uint32_t bkt_index, i; + + sig = t->f_hash(key, t->key_size, t->seed); + bkt_index = sig & t->bucket_mask; + bkt = &t->buckets[bkt_index]; + sig = (sig >> 16) | 1LLU; + + /* Key is present in the bucket */ + for (i = 0; i < KEYS_PER_BUCKET; i++) { + uint64_t bkt_sig = (uint64_t) bkt->sig[i]; + uint32_t bkt_key_index = bkt->key_pos[i]; + uint8_t *bkt_key = &t->key_mem[bkt_key_index << + t->key_size_shl]; + + if ((sig == bkt_sig) && + (memcmp(key, bkt_key, t->key_size) == 0)) { + uint8_t *data = &t->data_mem[bkt_key_index << + t->data_size_shl]; + + bkt->sig[i] = 0; + t->key_stack[t->key_stack_tos++] = bkt_key_index; + *key_found = 1; + memcpy(entry, data, t->entry_size); + return 0; + } + } + + /* Key is not present in the bucket */ + *key_found = 0; + return 0; +} + +static int rte_table_hash_lru_lookup_unoptimized( + void *table, + struct rte_mbuf **pkts, + uint64_t pkts_mask, + uint64_t *lookup_hit_mask, + void **entries, + int dosig) +{ + struct rte_table_hash *t = (struct rte_table_hash *) table; + uint64_t pkts_mask_out = 0; + + __rte_unused uint32_t n_pkts_in = __builtin_popcountll(pkts_mask); + RTE_TABLE_HASH_LRU_STATS_PKTS_IN_ADD(t, n_pkts_in); + + for ( ; pkts_mask; ) { + struct bucket *bkt; + struct rte_mbuf *pkt; + uint8_t *key; + uint64_t pkt_mask, sig; + uint32_t pkt_index, bkt_index, i; + + pkt_index = __builtin_ctzll(pkts_mask); + pkt_mask = 1LLU << pkt_index; + pkts_mask &= ~pkt_mask; + + pkt = pkts[pkt_index]; + key = RTE_MBUF_METADATA_UINT8_PTR(pkt, t->key_offset); + if (dosig) + sig = (uint64_t) t->f_hash(key, t->key_size, t->seed); + else + sig = RTE_MBUF_METADATA_UINT32(pkt, + t->signature_offset); + + bkt_index = sig & t->bucket_mask; + bkt = &t->buckets[bkt_index]; + sig = (sig >> 16) | 1LLU; + + /* Key is present in the bucket */ + for (i = 0; i < KEYS_PER_BUCKET; i++) { + uint64_t bkt_sig = (uint64_t) bkt->sig[i]; + uint32_t bkt_key_index = bkt->key_pos[i]; + uint8_t *bkt_key = &t->key_mem[bkt_key_index << + t->key_size_shl]; + + if ((sig == bkt_sig) && (memcmp(key, bkt_key, + t->key_size) == 0)) { + uint8_t *data = &t->data_mem[bkt_key_index << + t->data_size_shl]; + + lru_update(bkt, i); + pkts_mask_out |= pkt_mask; + entries[pkt_index] = (void *) data; + break; + } + } + } + + *lookup_hit_mask = pkts_mask_out; + RTE_TABLE_HASH_LRU_STATS_PKTS_LOOKUP_MISS(t, n_pkts_in - __builtin_popcountll(pkts_mask_out)); + return 0; +} + +/*** +* +* mask = match bitmask +* match = at least one match +* match_many = more than one match +* match_pos = position of first match +* +* ---------------------------------------- +* mask match match_many match_pos +* ---------------------------------------- +* 0000 0 0 00 +* 0001 1 0 00 +* 0010 1 0 01 +* 0011 1 1 00 +* ---------------------------------------- +* 0100 1 0 10 +* 0101 1 1 00 +* 0110 1 1 01 +* 0111 1 1 00 +* ---------------------------------------- +* 1000 1 0 11 +* 1001 1 1 00 +* 1010 1 1 01 +* 1011 1 1 00 +* ---------------------------------------- +* 1100 1 1 10 +* 1101 1 1 00 +* 1110 1 1 01 +* 1111 1 1 00 +* ---------------------------------------- +* +* match = 1111_1111_1111_1110 +* match_many = 1111_1110_1110_1000 +* match_pos = 0001_0010_0001_0011__0001_0010_0001_0000 +* +* match = 0xFFFELLU +* match_many = 0xFEE8LLU +* match_pos = 0x12131210LLU +* +***/ + +#define LUT_MATCH 0xFFFELLU +#define LUT_MATCH_MANY 0xFEE8LLU +#define LUT_MATCH_POS 0x12131210LLU + +#define lookup_cmp_sig(mbuf_sig, bucket, match, match_many, match_pos)\ +{ \ + uint64_t bucket_sig[4], mask[4], mask_all; \ + \ + bucket_sig[0] = bucket->sig[0]; \ + bucket_sig[1] = bucket->sig[1]; \ + bucket_sig[2] = bucket->sig[2]; \ + bucket_sig[3] = bucket->sig[3]; \ + \ + bucket_sig[0] ^= mbuf_sig; \ + bucket_sig[1] ^= mbuf_sig; \ + bucket_sig[2] ^= mbuf_sig; \ + bucket_sig[3] ^= mbuf_sig; \ + \ + mask[0] = 0; \ + mask[1] = 0; \ + mask[2] = 0; \ + mask[3] = 0; \ + \ + if (bucket_sig[0] == 0) \ + mask[0] = 1; \ + if (bucket_sig[1] == 0) \ + mask[1] = 2; \ + if (bucket_sig[2] == 0) \ + mask[2] = 4; \ + if (bucket_sig[3] == 0) \ + mask[3] = 8; \ + \ + mask_all = (mask[0] | mask[1]) | (mask[2] | mask[3]); \ + \ + match = (LUT_MATCH >> mask_all) & 1; \ + match_many = (LUT_MATCH_MANY >> mask_all) & 1; \ + match_pos = (LUT_MATCH_POS >> (mask_all << 1)) & 3; \ +} + +#define lookup_cmp_key(mbuf, key, match_key, f) \ +{ \ + uint64_t *pkt_key = RTE_MBUF_METADATA_UINT64_PTR(mbuf, f->key_offset);\ + uint64_t *bkt_key = (uint64_t *) key; \ + \ + switch (f->key_size) { \ + case 8: \ + { \ + uint64_t xor = pkt_key[0] ^ bkt_key[0]; \ + match_key = 0; \ + if (xor == 0) \ + match_key = 1; \ + } \ + break; \ + \ + case 16: \ + { \ + uint64_t xor[2], or; \ + \ + xor[0] = pkt_key[0] ^ bkt_key[0]; \ + xor[1] = pkt_key[1] ^ bkt_key[1]; \ + or = xor[0] | xor[1]; \ + match_key = 0; \ + if (or == 0) \ + match_key = 1; \ + } \ + break; \ + \ + case 32: \ + { \ + uint64_t xor[4], or; \ + \ + xor[0] = pkt_key[0] ^ bkt_key[0]; \ + xor[1] = pkt_key[1] ^ bkt_key[1]; \ + xor[2] = pkt_key[2] ^ bkt_key[2]; \ + xor[3] = pkt_key[3] ^ bkt_key[3]; \ + or = xor[0] | xor[1] | xor[2] | xor[3]; \ + match_key = 0; \ + if (or == 0) \ + match_key = 1; \ + } \ + break; \ + \ + case 64: \ + { \ + uint64_t xor[8], or; \ + \ + xor[0] = pkt_key[0] ^ bkt_key[0]; \ + xor[1] = pkt_key[1] ^ bkt_key[1]; \ + xor[2] = pkt_key[2] ^ bkt_key[2]; \ + xor[3] = pkt_key[3] ^ bkt_key[3]; \ + xor[4] = pkt_key[4] ^ bkt_key[4]; \ + xor[5] = pkt_key[5] ^ bkt_key[5]; \ + xor[6] = pkt_key[6] ^ bkt_key[6]; \ + xor[7] = pkt_key[7] ^ bkt_key[7]; \ + or = xor[0] | xor[1] | xor[2] | xor[3] | \ + xor[4] | xor[5] | xor[6] | xor[7]; \ + match_key = 0; \ + if (or == 0) \ + match_key = 1; \ + } \ + break; \ + \ + default: \ + match_key = 0; \ + if (memcmp(pkt_key, bkt_key, f->key_size) == 0) \ + match_key = 1; \ + } \ +} + +#define lookup2_stage0(t, g, pkts, pkts_mask, pkt00_index, pkt01_index)\ +{ \ + uint64_t pkt00_mask, pkt01_mask; \ + struct rte_mbuf *mbuf00, *mbuf01; \ + uint32_t key_offset = t->key_offset; \ + \ + pkt00_index = __builtin_ctzll(pkts_mask); \ + pkt00_mask = 1LLU << pkt00_index; \ + pkts_mask &= ~pkt00_mask; \ + mbuf00 = pkts[pkt00_index]; \ + \ + pkt01_index = __builtin_ctzll(pkts_mask); \ + pkt01_mask = 1LLU << pkt01_index; \ + pkts_mask &= ~pkt01_mask; \ + mbuf01 = pkts[pkt01_index]; \ + \ + rte_prefetch0(RTE_MBUF_METADATA_UINT8_PTR(mbuf00, key_offset));\ + rte_prefetch0(RTE_MBUF_METADATA_UINT8_PTR(mbuf01, key_offset));\ +} + +#define lookup2_stage0_with_odd_support(t, g, pkts, pkts_mask, pkt00_index, \ + pkt01_index) \ +{ \ + uint64_t pkt00_mask, pkt01_mask; \ + struct rte_mbuf *mbuf00, *mbuf01; \ + uint32_t key_offset = t->key_offset; \ + \ + pkt00_index = __builtin_ctzll(pkts_mask); \ + pkt00_mask = 1LLU << pkt00_index; \ + pkts_mask &= ~pkt00_mask; \ + mbuf00 = pkts[pkt00_index]; \ + \ + pkt01_index = __builtin_ctzll(pkts_mask); \ + if (pkts_mask == 0) \ + pkt01_index = pkt00_index; \ + \ + pkt01_mask = 1LLU << pkt01_index; \ + pkts_mask &= ~pkt01_mask; \ + mbuf01 = pkts[pkt01_index]; \ + \ + rte_prefetch0(RTE_MBUF_METADATA_UINT8_PTR(mbuf00, key_offset));\ + rte_prefetch0(RTE_MBUF_METADATA_UINT8_PTR(mbuf01, key_offset));\ +} + +#define lookup2_stage1(t, g, pkts, pkt10_index, pkt11_index) \ +{ \ + struct grinder *g10, *g11; \ + uint64_t sig10, sig11, bkt10_index, bkt11_index; \ + struct rte_mbuf *mbuf10, *mbuf11; \ + struct bucket *bkt10, *bkt11, *buckets = t->buckets; \ + uint64_t bucket_mask = t->bucket_mask; \ + uint32_t signature_offset = t->signature_offset; \ + \ + mbuf10 = pkts[pkt10_index]; \ + sig10 = (uint64_t) RTE_MBUF_METADATA_UINT32(mbuf10, signature_offset);\ + bkt10_index = sig10 & bucket_mask; \ + bkt10 = &buckets[bkt10_index]; \ + \ + mbuf11 = pkts[pkt11_index]; \ + sig11 = (uint64_t) RTE_MBUF_METADATA_UINT32(mbuf11, signature_offset);\ + bkt11_index = sig11 & bucket_mask; \ + bkt11 = &buckets[bkt11_index]; \ + \ + rte_prefetch0(bkt10); \ + rte_prefetch0(bkt11); \ + \ + g10 = &g[pkt10_index]; \ + g10->sig = sig10; \ + g10->bkt = bkt10; \ + \ + g11 = &g[pkt11_index]; \ + g11->sig = sig11; \ + g11->bkt = bkt11; \ +} + +#define lookup2_stage1_dosig(t, g, pkts, pkt10_index, pkt11_index)\ +{ \ + struct grinder *g10, *g11; \ + uint64_t sig10, sig11, bkt10_index, bkt11_index; \ + struct rte_mbuf *mbuf10, *mbuf11; \ + struct bucket *bkt10, *bkt11, *buckets = t->buckets; \ + uint8_t *key10, *key11; \ + uint64_t bucket_mask = t->bucket_mask; \ + rte_table_hash_op_hash f_hash = t->f_hash; \ + uint64_t seed = t->seed; \ + uint32_t key_size = t->key_size; \ + uint32_t key_offset = t->key_offset; \ + \ + mbuf10 = pkts[pkt10_index]; \ + key10 = RTE_MBUF_METADATA_UINT8_PTR(mbuf10, key_offset);\ + sig10 = (uint64_t) f_hash(key10, key_size, seed); \ + bkt10_index = sig10 & bucket_mask; \ + bkt10 = &buckets[bkt10_index]; \ + \ + mbuf11 = pkts[pkt11_index]; \ + key11 = RTE_MBUF_METADATA_UINT8_PTR(mbuf11, key_offset);\ + sig11 = (uint64_t) f_hash(key11, key_size, seed); \ + bkt11_index = sig11 & bucket_mask; \ + bkt11 = &buckets[bkt11_index]; \ + \ + rte_prefetch0(bkt10); \ + rte_prefetch0(bkt11); \ + \ + g10 = &g[pkt10_index]; \ + g10->sig = sig10; \ + g10->bkt = bkt10; \ + \ + g11 = &g[pkt11_index]; \ + g11->sig = sig11; \ + g11->bkt = bkt11; \ +} + +#define lookup2_stage2(t, g, pkt20_index, pkt21_index, pkts_mask_match_many)\ +{ \ + struct grinder *g20, *g21; \ + uint64_t sig20, sig21; \ + struct bucket *bkt20, *bkt21; \ + uint8_t *key20, *key21, *key_mem = t->key_mem; \ + uint64_t match20, match21, match_many20, match_many21; \ + uint64_t match_pos20, match_pos21; \ + uint32_t key20_index, key21_index, key_size_shl = t->key_size_shl;\ + \ + g20 = &g[pkt20_index]; \ + sig20 = g20->sig; \ + bkt20 = g20->bkt; \ + sig20 = (sig20 >> 16) | 1LLU; \ + lookup_cmp_sig(sig20, bkt20, match20, match_many20, match_pos20);\ + match20 <<= pkt20_index; \ + match_many20 <<= pkt20_index; \ + key20_index = bkt20->key_pos[match_pos20]; \ + key20 = &key_mem[key20_index << key_size_shl]; \ + \ + g21 = &g[pkt21_index]; \ + sig21 = g21->sig; \ + bkt21 = g21->bkt; \ + sig21 = (sig21 >> 16) | 1LLU; \ + lookup_cmp_sig(sig21, bkt21, match21, match_many21, match_pos21);\ + match21 <<= pkt21_index; \ + match_many21 <<= pkt21_index; \ + key21_index = bkt21->key_pos[match_pos21]; \ + key21 = &key_mem[key21_index << key_size_shl]; \ + \ + rte_prefetch0(key20); \ + rte_prefetch0(key21); \ + \ + pkts_mask_match_many |= match_many20 | match_many21; \ + \ + g20->match = match20; \ + g20->match_pos = match_pos20; \ + g20->key_index = key20_index; \ + \ + g21->match = match21; \ + g21->match_pos = match_pos21; \ + g21->key_index = key21_index; \ +} + +#define lookup2_stage3(t, g, pkts, pkt30_index, pkt31_index, pkts_mask_out, \ + entries) \ +{ \ + struct grinder *g30, *g31; \ + struct rte_mbuf *mbuf30, *mbuf31; \ + struct bucket *bkt30, *bkt31; \ + uint8_t *key30, *key31, *key_mem = t->key_mem; \ + uint8_t *data30, *data31, *data_mem = t->data_mem; \ + uint64_t match30, match31, match_pos30, match_pos31; \ + uint64_t match_key30, match_key31, match_keys; \ + uint32_t key30_index, key31_index; \ + uint32_t key_size_shl = t->key_size_shl; \ + uint32_t data_size_shl = t->data_size_shl; \ + \ + mbuf30 = pkts[pkt30_index]; \ + g30 = &g[pkt30_index]; \ + bkt30 = g30->bkt; \ + match30 = g30->match; \ + match_pos30 = g30->match_pos; \ + key30_index = g30->key_index; \ + key30 = &key_mem[key30_index << key_size_shl]; \ + lookup_cmp_key(mbuf30, key30, match_key30, t); \ + match_key30 <<= pkt30_index; \ + match_key30 &= match30; \ + data30 = &data_mem[key30_index << data_size_shl]; \ + entries[pkt30_index] = data30; \ + \ + mbuf31 = pkts[pkt31_index]; \ + g31 = &g[pkt31_index]; \ + bkt31 = g31->bkt; \ + match31 = g31->match; \ + match_pos31 = g31->match_pos; \ + key31_index = g31->key_index; \ + key31 = &key_mem[key31_index << key_size_shl]; \ + lookup_cmp_key(mbuf31, key31, match_key31, t); \ + match_key31 <<= pkt31_index; \ + match_key31 &= match31; \ + data31 = &data_mem[key31_index << data_size_shl]; \ + entries[pkt31_index] = data31; \ + \ + rte_prefetch0(data30); \ + rte_prefetch0(data31); \ + \ + match_keys = match_key30 | match_key31; \ + pkts_mask_out |= match_keys; \ + \ + if (match_key30 == 0) \ + match_pos30 = 4; \ + lru_update(bkt30, match_pos30); \ + \ + if (match_key31 == 0) \ + match_pos31 = 4; \ + lru_update(bkt31, match_pos31); \ +} + +/*** +* The lookup function implements a 4-stage pipeline, with each stage processing +* two different packets. The purpose of pipelined implementation is to hide the +* latency of prefetching the data structures and loosen the data dependency +* between instructions. +* +* p00 _______ p10 _______ p20 _______ p30 _______ +* ----->| |----->| |----->| |----->| |-----> +* | 0 | | 1 | | 2 | | 3 | +* ----->|_______|----->|_______|----->|_______|----->|_______|-----> +* p01 p11 p21 p31 +* +* The naming convention is: +* pXY = packet Y of stage X, X = 0 .. 3, Y = 0 .. 1 +* +***/ +static int rte_table_hash_lru_lookup( + void *table, + struct rte_mbuf **pkts, + uint64_t pkts_mask, + uint64_t *lookup_hit_mask, + void **entries) +{ + struct rte_table_hash *t = (struct rte_table_hash *) table; + struct grinder *g = t->grinders; + uint64_t pkt00_index, pkt01_index, pkt10_index, pkt11_index; + uint64_t pkt20_index, pkt21_index, pkt30_index, pkt31_index; + uint64_t pkts_mask_out = 0, pkts_mask_match_many = 0; + int status = 0; + + __rte_unused uint32_t n_pkts_in = __builtin_popcountll(pkts_mask); + RTE_TABLE_HASH_LRU_STATS_PKTS_IN_ADD(t, n_pkts_in); + + /* Cannot run the pipeline with less than 7 packets */ + if (__builtin_popcountll(pkts_mask) < 7) + return rte_table_hash_lru_lookup_unoptimized(table, pkts, + pkts_mask, lookup_hit_mask, entries, 0); + + /* Pipeline stage 0 */ + lookup2_stage0(t, g, pkts, pkts_mask, pkt00_index, pkt01_index); + + /* Pipeline feed */ + pkt10_index = pkt00_index; + pkt11_index = pkt01_index; + + /* Pipeline stage 0 */ + lookup2_stage0(t, g, pkts, pkts_mask, pkt00_index, pkt01_index); + + /* Pipeline stage 1 */ + lookup2_stage1(t, g, pkts, pkt10_index, pkt11_index); + + /* Pipeline feed */ + pkt20_index = pkt10_index; + pkt21_index = pkt11_index; + pkt10_index = pkt00_index; + pkt11_index = pkt01_index; + + /* Pipeline stage 0 */ + lookup2_stage0(t, g, pkts, pkts_mask, pkt00_index, pkt01_index); + + /* Pipeline stage 1 */ + lookup2_stage1(t, g, pkts, pkt10_index, pkt11_index); + + /* Pipeline stage 2 */ + lookup2_stage2(t, g, pkt20_index, pkt21_index, pkts_mask_match_many); + + /* + * Pipeline run + * + */ + for ( ; pkts_mask; ) { + /* Pipeline feed */ + pkt30_index = pkt20_index; + pkt31_index = pkt21_index; + pkt20_index = pkt10_index; + pkt21_index = pkt11_index; + pkt10_index = pkt00_index; + pkt11_index = pkt01_index; + + /* Pipeline stage 0 */ + lookup2_stage0_with_odd_support(t, g, pkts, pkts_mask, + pkt00_index, pkt01_index); + + /* Pipeline stage 1 */ + lookup2_stage1(t, g, pkts, pkt10_index, pkt11_index); + + /* Pipeline stage 2 */ + lookup2_stage2(t, g, pkt20_index, pkt21_index, + pkts_mask_match_many); + + /* Pipeline stage 3 */ + lookup2_stage3(t, g, pkts, pkt30_index, pkt31_index, + pkts_mask_out, entries); + } + + /* Pipeline feed */ + pkt30_index = pkt20_index; + pkt31_index = pkt21_index; + pkt20_index = pkt10_index; + pkt21_index = pkt11_index; + pkt10_index = pkt00_index; + pkt11_index = pkt01_index; + + /* Pipeline stage 1 */ + lookup2_stage1(t, g, pkts, pkt10_index, pkt11_index); + + /* Pipeline stage 2 */ + lookup2_stage2(t, g, pkt20_index, pkt21_index, pkts_mask_match_many); + + /* Pipeline stage 3 */ + lookup2_stage3(t, g, pkts, pkt30_index, pkt31_index, pkts_mask_out, + entries); + + /* Pipeline feed */ + pkt30_index = pkt20_index; + pkt31_index = pkt21_index; + pkt20_index = pkt10_index; + pkt21_index = pkt11_index; + + /* Pipeline stage 2 */ + lookup2_stage2(t, g, pkt20_index, pkt21_index, pkts_mask_match_many); + + /* Pipeline stage 3 */ + lookup2_stage3(t, g, pkts, pkt30_index, pkt31_index, pkts_mask_out, + entries); + + /* Pipeline feed */ + pkt30_index = pkt20_index; + pkt31_index = pkt21_index; + + /* Pipeline stage 3 */ + lookup2_stage3(t, g, pkts, pkt30_index, pkt31_index, pkts_mask_out, + entries); + + /* Slow path */ + pkts_mask_match_many &= ~pkts_mask_out; + if (pkts_mask_match_many) { + uint64_t pkts_mask_out_slow = 0; + + status = rte_table_hash_lru_lookup_unoptimized(table, pkts, + pkts_mask_match_many, &pkts_mask_out_slow, entries, 0); + pkts_mask_out |= pkts_mask_out_slow; + } + + *lookup_hit_mask = pkts_mask_out; + RTE_TABLE_HASH_LRU_STATS_PKTS_LOOKUP_MISS(t, n_pkts_in - __builtin_popcountll(pkts_mask_out)); + return status; +} + +static int rte_table_hash_lru_lookup_dosig( + void *table, + struct rte_mbuf **pkts, + uint64_t pkts_mask, + uint64_t *lookup_hit_mask, + void **entries) +{ + struct rte_table_hash *t = (struct rte_table_hash *) table; + struct grinder *g = t->grinders; + uint64_t pkt00_index, pkt01_index, pkt10_index, pkt11_index; + uint64_t pkt20_index, pkt21_index, pkt30_index, pkt31_index; + uint64_t pkts_mask_out = 0, pkts_mask_match_many = 0; + int status = 0; + + __rte_unused uint32_t n_pkts_in = __builtin_popcountll(pkts_mask); + RTE_TABLE_HASH_LRU_STATS_PKTS_IN_ADD(t, n_pkts_in); + + /* Cannot run the pipeline with less than 7 packets */ + if (__builtin_popcountll(pkts_mask) < 7) + return rte_table_hash_lru_lookup_unoptimized(table, pkts, + pkts_mask, lookup_hit_mask, entries, 1); + + /* Pipeline stage 0 */ + lookup2_stage0(t, g, pkts, pkts_mask, pkt00_index, pkt01_index); + + /* Pipeline feed */ + pkt10_index = pkt00_index; + pkt11_index = pkt01_index; + + /* Pipeline stage 0 */ + lookup2_stage0(t, g, pkts, pkts_mask, pkt00_index, pkt01_index); + + /* Pipeline stage 1 */ + lookup2_stage1_dosig(t, g, pkts, pkt10_index, pkt11_index); + + /* Pipeline feed */ + pkt20_index = pkt10_index; + pkt21_index = pkt11_index; + pkt10_index = pkt00_index; + pkt11_index = pkt01_index; + + /* Pipeline stage 0 */ + lookup2_stage0(t, g, pkts, pkts_mask, pkt00_index, pkt01_index); + + /* Pipeline stage 1 */ + lookup2_stage1_dosig(t, g, pkts, pkt10_index, pkt11_index); + + /* Pipeline stage 2 */ + lookup2_stage2(t, g, pkt20_index, pkt21_index, pkts_mask_match_many); + + /* + * Pipeline run + * + */ + for ( ; pkts_mask; ) { + /* Pipeline feed */ + pkt30_index = pkt20_index; + pkt31_index = pkt21_index; + pkt20_index = pkt10_index; + pkt21_index = pkt11_index; + pkt10_index = pkt00_index; + pkt11_index = pkt01_index; + + /* Pipeline stage 0 */ + lookup2_stage0_with_odd_support(t, g, pkts, pkts_mask, + pkt00_index, pkt01_index); + + /* Pipeline stage 1 */ + lookup2_stage1_dosig(t, g, pkts, pkt10_index, pkt11_index); + + /* Pipeline stage 2 */ + lookup2_stage2(t, g, pkt20_index, pkt21_index, + pkts_mask_match_many); + + /* Pipeline stage 3 */ + lookup2_stage3(t, g, pkts, pkt30_index, pkt31_index, + pkts_mask_out, entries); + } + + /* Pipeline feed */ + pkt30_index = pkt20_index; + pkt31_index = pkt21_index; + pkt20_index = pkt10_index; + pkt21_index = pkt11_index; + pkt10_index = pkt00_index; + pkt11_index = pkt01_index; + + /* Pipeline stage 1 */ + lookup2_stage1_dosig(t, g, pkts, pkt10_index, pkt11_index); + + /* Pipeline stage 2 */ + lookup2_stage2(t, g, pkt20_index, pkt21_index, pkts_mask_match_many); + + /* Pipeline stage 3 */ + lookup2_stage3(t, g, pkts, pkt30_index, pkt31_index, pkts_mask_out, + entries); + + /* Pipeline feed */ + pkt30_index = pkt20_index; + pkt31_index = pkt21_index; + pkt20_index = pkt10_index; + pkt21_index = pkt11_index; + + /* Pipeline stage 2 */ + lookup2_stage2(t, g, pkt20_index, pkt21_index, pkts_mask_match_many); + + /* Pipeline stage 3 */ + lookup2_stage3(t, g, pkts, pkt30_index, pkt31_index, pkts_mask_out, + entries); + + /* Pipeline feed */ + pkt30_index = pkt20_index; + pkt31_index = pkt21_index; + + /* Pipeline stage 3 */ + lookup2_stage3(t, g, pkts, pkt30_index, pkt31_index, pkts_mask_out, + entries); + + /* Slow path */ + pkts_mask_match_many &= ~pkts_mask_out; + if (pkts_mask_match_many) { + uint64_t pkts_mask_out_slow = 0; + + status = rte_table_hash_lru_lookup_unoptimized(table, pkts, + pkts_mask_match_many, &pkts_mask_out_slow, entries, 1); + pkts_mask_out |= pkts_mask_out_slow; + } + + *lookup_hit_mask = pkts_mask_out; + RTE_TABLE_HASH_LRU_STATS_PKTS_LOOKUP_MISS(t, n_pkts_in - __builtin_popcountll(pkts_mask_out)); + return status; +} + +static int +rte_table_hash_lru_stats_read(void *table, struct rte_table_stats *stats, int clear) +{ + struct rte_table_hash *t = (struct rte_table_hash *) table; + + if (stats != NULL) + memcpy(stats, &t->stats, sizeof(t->stats)); + + if (clear) + memset(&t->stats, 0, sizeof(t->stats)); + + return 0; +} + +struct rte_table_ops rte_table_hash_lru_ops = { + .f_create = rte_table_hash_lru_create, + .f_free = rte_table_hash_lru_free, + .f_add = rte_table_hash_lru_entry_add, + .f_delete = rte_table_hash_lru_entry_delete, + .f_add_bulk = NULL, + .f_delete_bulk = NULL, + .f_lookup = rte_table_hash_lru_lookup, + .f_stats = rte_table_hash_lru_stats_read, +}; + +struct rte_table_ops rte_table_hash_lru_dosig_ops = { + .f_create = rte_table_hash_lru_create, + .f_free = rte_table_hash_lru_free, + .f_add = rte_table_hash_lru_entry_add, + .f_delete = rte_table_hash_lru_entry_delete, + .f_add_bulk = NULL, + .f_delete_bulk = NULL, + .f_lookup = rte_table_hash_lru_lookup_dosig, + .f_stats = rte_table_hash_lru_stats_read, +}; |