+ while (n_left_from >= 4 && n_left_to_next >= 2)
+ {
+ u32 lbi0, next0, lfib_index0, bi0, hash_c0;
+ const mpls_unicast_header_t * h0;
+ const load_balance_t *lb0;
+ const dpo_id_t *dpo0;
+ vlib_buffer_t * b0;
+ u32 lbi1, next1, lfib_index1, bi1, hash_c1;
+ const mpls_unicast_header_t * h1;
+ const load_balance_t *lb1;
+ const dpo_id_t *dpo1;
+ vlib_buffer_t * b1;
+
+ /* 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, STORE);
+ vlib_prefetch_buffer_header (p3, STORE);
+
+ CLIB_PREFETCH (p2->data, sizeof (h0[0]), STORE);
+ CLIB_PREFETCH (p3->data, sizeof (h0[0]), STORE);
+ }
+
+ bi0 = to_next[0] = from[0];
+ bi1 = to_next[1] = from[1];
+
+ from += 2;
+ n_left_from -= 2;
+ to_next += 2;
+ n_left_to_next -= 2;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+ h0 = vlib_buffer_get_current (b0);
+ h1 = vlib_buffer_get_current (b1);
+
+ lfib_index0 = vec_elt(mm->fib_index_by_sw_if_index,
+ vnet_buffer(b0)->sw_if_index[VLIB_RX]);
+ lfib_index1 = vec_elt(mm->fib_index_by_sw_if_index,
+ vnet_buffer(b1)->sw_if_index[VLIB_RX]);
+
+ lbi0 = mpls_fib_table_forwarding_lookup (lfib_index0, h0);
+ lbi1 = mpls_fib_table_forwarding_lookup (lfib_index1, h1);
+ lb0 = load_balance_get(lbi0);
+ lb1 = load_balance_get(lbi1);
+
+ hash_c0 = vnet_buffer(b0)->ip.flow_hash = 0;
+ hash_c1 = vnet_buffer(b1)->ip.flow_hash = 0;
+
+ if (PREDICT_FALSE(lb0->lb_n_buckets > 1))
+ {
+ hash_c0 = vnet_buffer (b0)->ip.flow_hash =
+ mpls_compute_flow_hash(h0, lb0->lb_hash_config);
+ }
+ if (PREDICT_FALSE(lb1->lb_n_buckets > 1))
+ {
+ hash_c1 = vnet_buffer (b1)->ip.flow_hash =
+ mpls_compute_flow_hash(h1, lb1->lb_hash_config);
+ }
+
+ 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));
+
+ dpo0 = load_balance_get_bucket_i(lb0,
+ (hash_c0 &
+ (lb0->lb_n_buckets_minus_1)));
+ dpo1 = load_balance_get_bucket_i(lb1,
+ (hash_c1 &
+ (lb1->lb_n_buckets_minus_1)));
+
+ next0 = dpo0->dpoi_next_node;
+ next1 = dpo1->dpoi_next_node;
+
+ vnet_buffer (b0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
+ vnet_buffer (b1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
+
+ vlib_increment_combined_counter
+ (cm, cpu_index, lbi0, 1,
+ vlib_buffer_length_in_chain (vm, b0));
+ vlib_increment_combined_counter
+ (cm, cpu_index, lbi1, 1,
+ vlib_buffer_length_in_chain (vm, b1));
+
+ /*
+ * pop the label that was just used in the lookup
+ */
+ vlib_buffer_advance(b0, sizeof(*h0));
+ vlib_buffer_advance(b1, sizeof(*h1));
+
+ if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ mpls_lookup_trace_t *tr = vlib_add_trace (vm, node,
+ b0, sizeof (*tr));
+ tr->next_index = next0;
+ tr->lb_index = lbi0;
+ tr->lfib_index = lfib_index0;
+ tr->hash = hash_c0;
+ tr->label_net_byte_order = h0->label_exp_s_ttl;
+ }
+
+ if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ mpls_lookup_trace_t *tr = vlib_add_trace (vm, node,
+ b1, sizeof (*tr));
+ tr->next_index = next1;
+ tr->lb_index = lbi1;
+ tr->lfib_index = lfib_index1;
+ tr->hash = hash_c1;
+ tr->label_net_byte_order = h1->label_exp_s_ttl;
+ }
+
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, bi1, next0, next1);
+ }
+