diff options
Diffstat (limited to 'src/vnet')
| -rw-r--r-- | src/vnet/ip/ip4_forward.h | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/src/vnet/ip/ip4_forward.h b/src/vnet/ip/ip4_forward.h index b1294fdf2c3..2219b577b2a 100644 --- a/src/vnet/ip/ip4_forward.h +++ b/src/vnet/ip/ip4_forward.h @@ -40,6 +40,7 @@ #ifndef __included_ip4_forward_h__ #define __included_ip4_forward_h__ +#include <vppinfra/cache.h> #include <vnet/fib/ip4_fib.h> #include <vnet/dpo/load_balance_map.h> @@ -70,6 +71,7 @@ ip4_lookup_inline (vlib_main_t * vm, { vlib_get_next_frame (vm, node, next, to_next, n_left_to_next); +#if (CLIB_N_PREFETCHES >= 8) while (n_left_from >= 8 && n_left_to_next >= 4) { vlib_buffer_t *p0, *p1, *p2, *p3; @@ -283,7 +285,145 @@ ip4_lookup_inline (vlib_main_t * vm, pi0, pi1, pi2, pi3, next0, next1, next2, next3); } +#elif (CLIB_N_PREFETCHES >= 4) + while (n_left_from >= 4 && n_left_to_next >= 2) + { + vlib_buffer_t *p0, *p1; + ip4_header_t *ip0, *ip1; + ip_lookup_next_t next0, next1; + const load_balance_t *lb0, *lb1; + ip4_fib_mtrie_t *mtrie0, *mtrie1; + ip4_fib_mtrie_leaf_t leaf0, leaf1; + ip4_address_t *dst_addr0, *dst_addr1; + u32 pi0, pi1, lb_index0, lb_index1; + flow_hash_config_t flow_hash_config0, flow_hash_config1; + u32 hash_c0, hash_c1; + const dpo_id_t *dpo0, *dpo1; + + /* Prefetch next iteration. */ + { + vlib_buffer_t *p2, *p3; + + p2 = vlib_get_buffer (vm, from[2]); + p3 = vlib_get_buffer (vm, from[3]); + + vlib_prefetch_buffer_header (p2, LOAD); + vlib_prefetch_buffer_header (p3, LOAD); + + CLIB_PREFETCH (p2->data, sizeof (ip0[0]), LOAD); + CLIB_PREFETCH (p3->data, sizeof (ip0[0]), LOAD); + } + + pi0 = to_next[0] = from[0]; + pi1 = to_next[1] = from[1]; + + from += 2; + to_next += 2; + n_left_to_next -= 2; + n_left_from -= 2; + + p0 = vlib_get_buffer (vm, pi0); + p1 = vlib_get_buffer (vm, pi1); + + ip0 = vlib_buffer_get_current (p0); + ip1 = vlib_buffer_get_current (p1); + + dst_addr0 = &ip0->dst_address; + dst_addr1 = &ip1->dst_address; + + ip_lookup_set_buffer_fib_index (im->fib_index_by_sw_if_index, p0); + ip_lookup_set_buffer_fib_index (im->fib_index_by_sw_if_index, p1); + + if (!lookup_for_responses_to_locally_received_packets) + { + mtrie0 = &ip4_fib_get (vnet_buffer (p0)->ip.fib_index)->mtrie; + mtrie1 = &ip4_fib_get (vnet_buffer (p1)->ip.fib_index)->mtrie; + + leaf0 = ip4_fib_mtrie_lookup_step_one (mtrie0, dst_addr0); + leaf1 = ip4_fib_mtrie_lookup_step_one (mtrie1, dst_addr1); + } + + if (!lookup_for_responses_to_locally_received_packets) + { + leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0, dst_addr0, 2); + leaf1 = ip4_fib_mtrie_lookup_step (mtrie1, leaf1, dst_addr1, 2); + } + + if (!lookup_for_responses_to_locally_received_packets) + { + leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0, dst_addr0, 3); + leaf1 = ip4_fib_mtrie_lookup_step (mtrie1, leaf1, dst_addr1, 3); + } + if (lookup_for_responses_to_locally_received_packets) + { + lb_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_RX]; + lb_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_RX]; + } + else + { + lb_index0 = ip4_fib_mtrie_leaf_get_adj_index (leaf0); + lb_index1 = ip4_fib_mtrie_leaf_get_adj_index (leaf1); + } + + ASSERT (lb_index0 && lb_index1); + lb0 = load_balance_get (lb_index0); + lb1 = load_balance_get (lb_index1); + + ASSERT (lb0->lb_n_buckets > 0); + ASSERT (is_pow2 (lb0->lb_n_buckets)); + ASSERT (lb1->lb_n_buckets > 0); + ASSERT (is_pow2 (lb1->lb_n_buckets)); + + /* Use flow hash to compute multipath adjacency. */ + hash_c0 = vnet_buffer (p0)->ip.flow_hash = 0; + hash_c1 = vnet_buffer (p1)->ip.flow_hash = 0; + if (PREDICT_FALSE (lb0->lb_n_buckets > 1)) + { + flow_hash_config0 = lb0->lb_hash_config; + hash_c0 = vnet_buffer (p0)->ip.flow_hash = + ip4_compute_flow_hash (ip0, flow_hash_config0); + dpo0 = + load_balance_get_fwd_bucket (lb0, + (hash_c0 & + (lb0->lb_n_buckets_minus_1))); + } + else + { + dpo0 = load_balance_get_bucket_i (lb0, 0); + } + if (PREDICT_FALSE (lb1->lb_n_buckets > 1)) + { + flow_hash_config1 = lb1->lb_hash_config; + hash_c1 = vnet_buffer (p1)->ip.flow_hash = + ip4_compute_flow_hash (ip1, flow_hash_config1); + dpo1 = + load_balance_get_fwd_bucket (lb1, + (hash_c1 & + (lb1->lb_n_buckets_minus_1))); + } + else + { + dpo1 = load_balance_get_bucket_i (lb1, 0); + } + + next0 = dpo0->dpoi_next_node; + vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index; + next1 = dpo1->dpoi_next_node; + vnet_buffer (p1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index; + + vlib_increment_combined_counter + (cm, thread_index, lb_index0, 1, + vlib_buffer_length_in_chain (vm, p0)); + vlib_increment_combined_counter + (cm, thread_index, lb_index1, 1, + vlib_buffer_length_in_chain (vm, p1)); + + vlib_validate_buffer_enqueue_x2 (vm, node, next, + to_next, n_left_to_next, + pi0, pi1, next0, next1); + } +#endif while (n_left_from > 0 && n_left_to_next > 0) { vlib_buffer_t *p0; |