_Performance Testing PASS_

Branch: dpdk

cac2a49b4ae5e24078b43b2f8b7cd083f74620b9 --> performance testing pass

Test environment and result as below:

Ubuntu 18.04
Kernel: 4.15.0-generic
Compiler: gcc 7.4
NIC: Intel Corporation Ethernet Converged Network Adapter XL710-QDA2 40000 Mbps
Target: x86_64-native-linuxapp-gcc
Fail/Total: 0/2

Detail performance results: 
+------------+---------+----------+-------------+------------------------------+
| frame_size | txd/rxd | num_cpus | num_threads |  throughput difference from  |
|            |         |          |             |           expected           |
+============+=========+==========+=============+==============================+
| 64         | 512     | 1        | 1           | -1.56411%                    |
+------------+---------+----------+-------------+------------------------------+
| 64         | 2048    | 1        | 1           | 0.54296%                     |
+------------+---------+----------+-------------+------------------------------+

To view detailed results, visit:
https://lab.dpdk.org/results/dashboard/tarballs/15806/

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