vxlan: improve encap performance
1. For vxlan, prefetching one cacheline is enough.
2. Reduce vlib_increment_combined_counter functtion calling
if possible.
@@ -116,8 +116,8 @@ vxlan_encap_inline (vlib_main_t * vm,
vlib_prefetch_buffer_header (p2, LOAD);
vlib_prefetch_buffer_header (p3, LOAD);
- CLIB_PREFETCH (p2->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
- CLIB_PREFETCH (p3->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
+ CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD);
+ CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, LOAD);
}
u32 bi0 = to_next[0] = from[0];
@@ -292,10 +292,18 @@ vxlan_encap_inline (vlib_main_t * vm,
udp1->checksum = 0xffff;
}
+ if (sw_if_index0 == sw_if_index1)
+ {
+ vlib_increment_combined_counter (tx_counter, thread_index,
+ sw_if_index0, 2, len0 + len1);
+ }
+ else
+ {
vlib_increment_combined_counter (tx_counter, thread_index,
sw_if_index0, 1, len0);
vlib_increment_combined_counter (tx_counter, thread_index,
sw_if_index1, 1, len1);
+ }
pkts_encapsulated += 2;
if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
