#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>
vlib_combined_counter_main_t *cm = &load_balance_main.lbm_to_counters;
u32 n_left_from, n_left_to_next, *from, *to_next;
ip_lookup_next_t next;
- u32 thread_index = vlib_get_thread_index ();
+ u32 thread_index = vm->thread_index;
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE];
+ vlib_buffer_t **b = bufs;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
next = node->cached_next_index;
+ vlib_get_buffers (vm, from, bufs, n_left_from);
while (n_left_from > 0)
{
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;
/* Prefetch next iteration. */
{
- vlib_buffer_t *p4, *p5, *p6, *p7;
-
- p4 = vlib_get_buffer (vm, from[4]);
- p5 = vlib_get_buffer (vm, from[5]);
- p6 = vlib_get_buffer (vm, from[6]);
- p7 = vlib_get_buffer (vm, from[7]);
-
- vlib_prefetch_buffer_header (p4, LOAD);
- vlib_prefetch_buffer_header (p5, LOAD);
- vlib_prefetch_buffer_header (p6, LOAD);
- vlib_prefetch_buffer_header (p7, LOAD);
-
- CLIB_PREFETCH (p4->data, sizeof (ip0[0]), LOAD);
- CLIB_PREFETCH (p5->data, sizeof (ip0[0]), LOAD);
- CLIB_PREFETCH (p6->data, sizeof (ip0[0]), LOAD);
- CLIB_PREFETCH (p7->data, sizeof (ip0[0]), LOAD);
+ vlib_prefetch_buffer_header (b[4], LOAD);
+ vlib_prefetch_buffer_header (b[5], LOAD);
+ vlib_prefetch_buffer_header (b[6], LOAD);
+ vlib_prefetch_buffer_header (b[7], LOAD);
+
+ CLIB_PREFETCH (b[4]->data, sizeof (ip0[0]), LOAD);
+ CLIB_PREFETCH (b[5]->data, sizeof (ip0[0]), LOAD);
+ CLIB_PREFETCH (b[6]->data, sizeof (ip0[0]), LOAD);
+ CLIB_PREFETCH (b[7]->data, sizeof (ip0[0]), LOAD);
}
pi0 = to_next[0] = from[0];
n_left_to_next -= 4;
n_left_from -= 4;
- p0 = vlib_get_buffer (vm, pi0);
- p1 = vlib_get_buffer (vm, pi1);
- p2 = vlib_get_buffer (vm, pi2);
- p3 = vlib_get_buffer (vm, pi3);
+ p0 = b[0];
+ p1 = b[1];
+ p2 = b[2];
+ p3 = b[3];
+ b += 4;
ip0 = vlib_buffer_get_current (p0);
ip1 = vlib_buffer_get_current (p1);
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_prefetch_buffer_header (b[2], LOAD);
+ vlib_prefetch_buffer_header (b[3], LOAD);
+
+ CLIB_PREFETCH (b[2]->data, sizeof (ip0[0]), LOAD);
+ CLIB_PREFETCH (b[3]->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 = b[0];
+ p1 = b[1];
+ b += 2;
+
+ 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;
pi0 = from[0];
to_next[0] = pi0;
- p0 = vlib_get_buffer (vm, pi0);
+ p0 = b[0];
+ b += 1;
+
ip0 = vlib_buffer_get_current (p0);
dst_addr0 = &ip0->dst_address;
ip_lookup_set_buffer_fib_index (im->fib_index_by_sw_if_index, p0);
Code Review / vpp.git / blobdiff