perfmon: new perfmon plugin

Type: feature
Change-Id: I2c14f82393d11fc05c6d229f5c58603ab5c0f14d
Signed-off-by: Damjan Marion <damarion@cisco.com>
diff --git a/src/vlib/main.h b/src/vlib/main.h
index 477211d..5f78b79 100644
--- a/src/vlib/main.h
+++ b/src/vlib/main.h
@@ -149,6 +149,9 @@
   /* Main loop hw / sw performance counters */
   vlib_node_runtime_perf_callback_set_t vlib_node_runtime_perf_callbacks;
 
+  /* dispatch wrapper function */
+  vlib_node_function_t *dispatch_wrapper_fn;
+
   /* Every so often we switch to the next counter. */
 #define VLIB_LOG2_MAIN_LOOPS_PER_STATS_UPDATE 7