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-rw-r--r--src/plugins/nat/in2out_ed.c14
-rw-r--r--src/plugins/nat/out2in_ed.c15
2 files changed, 27 insertions, 2 deletions
diff --git a/src/plugins/nat/in2out_ed.c b/src/plugins/nat/in2out_ed.c
index c59c2d4536c..080f37e7c15 100644
--- a/src/plugins/nat/in2out_ed.c
+++ b/src/plugins/nat/in2out_ed.c
@@ -943,6 +943,19 @@ nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t * vm,
ip_csum_t sum0;
b0 = *b;
+ b++;
+
+ /* Prefetch next iteration. */
+ if (PREDICT_TRUE (n_left_from >= 2))
+ {
+ vlib_buffer_t *p2;
+
+ p2 = *b;
+
+ vlib_prefetch_buffer_header (p2, LOAD);
+
+ CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD);
+ }
if (is_output_feature)
{
@@ -1158,7 +1171,6 @@ nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t * vm,
n_left_from--;
next++;
- b++;
}
vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts,
diff --git a/src/plugins/nat/out2in_ed.c b/src/plugins/nat/out2in_ed.c
index 8286e66ffda..05fc75fac71 100644
--- a/src/plugins/nat/out2in_ed.c
+++ b/src/plugins/nat/out2in_ed.c
@@ -705,6 +705,20 @@ nat44_ed_out2in_fast_path_node_fn_inline (vlib_main_t * vm,
ip_csum_t sum0;
b0 = *b;
+ b++;
+
+ /* Prefetch next iteration. */
+ if (PREDICT_TRUE (n_left_from >= 2))
+ {
+ vlib_buffer_t *p2;
+
+ p2 = *b;
+
+ vlib_prefetch_buffer_header (p2, LOAD);
+
+ CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD);
+ }
+
next[0] = vnet_buffer2 (b0)->nat.arc_next;
vnet_buffer (b0)->snat.flags = 0;
@@ -927,7 +941,6 @@ nat44_ed_out2in_fast_path_node_fn_inline (vlib_main_t * vm,
n_left_from--;
next++;
- b++;
}
vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts,