diff options
Diffstat (limited to 'src/vnet/ip')
| -rw-r--r-- | src/vnet/ip/ip4_forward.c | 36 |
1 files changed, 19 insertions, 17 deletions
diff --git a/src/vnet/ip/ip4_forward.c b/src/vnet/ip/ip4_forward.c index 0dad61d45d0..7352c2e718d 100644 --- a/src/vnet/ip/ip4_forward.c +++ b/src/vnet/ip/ip4_forward.c @@ -2375,6 +2375,17 @@ ip4_rewrite_inline (vlib_main_t * vm, adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX]; adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX]; + /* + * pre-fetch the per-adjacency counters + */ + if (do_counters) + { + vlib_prefetch_combined_counter (&adjacency_counters, + cpu_index, adj_index0); + vlib_prefetch_combined_counter (&adjacency_counters, + cpu_index, adj_index1); + } + /* We should never rewrite a pkt using the MISS adjacency */ ASSERT (adj_index0 && adj_index1); @@ -2480,17 +2491,6 @@ ip4_rewrite_inline (vlib_main_t * vm, rewrite_header.max_l3_packet_bytes ? IP4_ERROR_MTU_EXCEEDED : error1); - /* - * pre-fetch the per-adjacency counters - */ - if (do_counters) - { - vlib_prefetch_combined_counter (&adjacency_counters, - cpu_index, adj_index0); - vlib_prefetch_combined_counter (&adjacency_counters, - cpu_index, adj_index1); - } - /* Don't adjust the buffer for ttl issue; icmp-error node wants * to see the IP headerr */ if (PREDICT_TRUE (error0 == IP4_ERROR_NONE)) @@ -2624,8 +2624,9 @@ ip4_rewrite_inline (vlib_main_t * vm, p0->flags &= ~VNET_BUFFER_LOCALLY_ORIGINATED; } - vlib_prefetch_combined_counter (&adjacency_counters, - cpu_index, adj_index0); + if (do_counters) + vlib_prefetch_combined_counter (&adjacency_counters, + cpu_index, adj_index0); /* Guess we are only writing on simple Ethernet header. */ vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t)); @@ -2641,10 +2642,11 @@ ip4_rewrite_inline (vlib_main_t * vm, rw_len0 = adj0[0].rewrite_header.data_bytes; vnet_buffer (p0)->ip.save_rewrite_length = rw_len0; - vlib_increment_combined_counter - (&adjacency_counters, - cpu_index, - adj_index0, 1, vlib_buffer_length_in_chain (vm, p0) + rw_len0); + if (do_counters) + vlib_increment_combined_counter + (&adjacency_counters, + cpu_index, adj_index0, 1, + vlib_buffer_length_in_chain (vm, p0) + rw_len0); /* Check MTU of outgoing interface. */ error0 = (vlib_buffer_length_in_chain (vm, p0) |