vlib: fix trace number accounting

[vpp.git] / src / plugins / dpdk / device / node.c

diff --git a/src/plugins/dpdk/device/node.c b/src/plugins/dpdk/device/node.c
index 256c399..e7d836f 100644 (file)
--- a/src/plugins/dpdk/device/node.c
+++ b/src/plugins/dpdk/device/node.c
@@ -417,21 +417,28 @@ dpdk_device_input (vlib_main_t * vm, dpdk_main_t * dm, dpdk_device_t * xd,
          b0 = vlib_get_buffer (vm, buffers[0]);
          if (single_next == 0)
            next_index = next[0];
-         vlib_trace_buffer (vm, node, next_index, b0, /* follow_chain */ 0);
-
-         dpdk_rx_trace_t *t0 = vlib_add_trace (vm, node, b0, sizeof t0[0]);
-         t0->queue_index = queue_id;
-         t0->device_index = xd->device_index;
-         t0->buffer_index = vlib_get_buffer_index (vm, b0);
-
-         clib_memcpy_fast (&t0->mb, mb[0], sizeof t0->mb);
-         clib_memcpy_fast (&t0->buffer, b0,
-                           sizeof b0[0] - sizeof b0->pre_data);
-         clib_memcpy_fast (t0->buffer.pre_data, b0->data,
-                           sizeof t0->buffer.pre_data);
-         clib_memcpy_fast (&t0->data, mb[0]->buf_addr + mb[0]->data_off,
-                           sizeof t0->data);
-         n_trace--;
+
+         if (PREDICT_TRUE
+             (vlib_trace_buffer
+              (vm, node, next_index, b0, /* follow_chain */ 0)))
+           {
+
+             dpdk_rx_trace_t *t0 =
+               vlib_add_trace (vm, node, b0, sizeof t0[0]);
+             t0->queue_index = queue_id;
+             t0->device_index = xd->device_index;
+             t0->buffer_index = vlib_get_buffer_index (vm, b0);
+
+             clib_memcpy_fast (&t0->mb, mb[0], sizeof t0->mb);
+             clib_memcpy_fast (&t0->buffer, b0,
+                               sizeof b0[0] - sizeof b0->pre_data);
+             clib_memcpy_fast (t0->buffer.pre_data, b0->data,
+                               sizeof t0->buffer.pre_data);
+             clib_memcpy_fast (&t0->data, mb[0]->buf_addr + mb[0]->data_off,
+                               sizeof t0->data);
+             n_trace--;
+           }
+
          n_left--;
          buffers++;
          mb++;