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authorDave Barach <dave@barachs.net>2017-02-15 09:01:01 -0500
committerDamjan Marion <damarion@cisco.com>2017-02-17 13:32:42 +0100
commit681abe46c9ea30e5c386db74c997714433470c4c (patch)
tree748946309bca26c11ebaa460689ba91a66d2313a /src/vnet/l2/l2_output.c
parent6e9cf3b9b53e69408514f9451235119a31045ed6 (diff)
l2 input: avoid per-packet trace checks in the fast path
Change-Id: Ib0c8572773499d8dd4d81b3a565c24412ccc3510 Signed-off-by: Dave Barach <dave@barachs.net>
Diffstat (limited to 'src/vnet/l2/l2_output.c')
-rw-r--r--src/vnet/l2/l2_output.c19
1 files changed, 13 insertions, 6 deletions
diff --git a/src/vnet/l2/l2_output.c b/src/vnet/l2/l2_output.c
index 953fcb0222a..acfe3abad90 100644
--- a/src/vnet/l2/l2_output.c
+++ b/src/vnet/l2/l2_output.c
@@ -140,9 +140,9 @@ l2output_vtr (vlib_node_runtime_t * node, l2_output_config_t * config,
static vlib_node_registration_t l2output_node;
-static uword
-l2output_node_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node, vlib_frame_t * frame)
+static_always_inline uword
+l2output_node_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * frame, int do_trace)
{
u32 n_left_from, *from, *to_next;
l2output_next_t next_index;
@@ -214,7 +214,7 @@ l2output_node_fn (vlib_main_t * vm,
sw_if_index2 = vnet_buffer (b2)->sw_if_index[VLIB_TX];
sw_if_index3 = vnet_buffer (b3)->sw_if_index[VLIB_TX];
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
+ if (do_trace)
{
h0 = vlib_buffer_get_current (b0);
h1 = vlib_buffer_get_current (b1);
@@ -378,8 +378,7 @@ l2output_node_fn (vlib_main_t * vm,
sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ if (do_trace && PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
{
l2output_trace_t *t =
vlib_add_trace (vm, node, b0, sizeof (*t));
@@ -434,6 +433,14 @@ l2output_node_fn (vlib_main_t * vm,
return frame->n_vectors;
}
+static uword
+l2output_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
+ return l2output_node_inline (vm, node, frame, 1 /* do_trace */ );
+ return l2output_node_inline (vm, node, frame, 0 /* do_trace */ );
+}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (l2output_node,static) = {