_Performance Testing PASS_

Branch: dpdk

a02b9406a8769247737b55dbfa50b6b5f896d946 --> performance testing pass

Test environment and result as below:

Ubuntu 18.04
Kernel: 4.15.0-generic
GCC: 7.4
NIC: Mellanox ConnectX-4 Lx 40000 Mbps
Target: x86_64-native-linuxapp-gcc
Fail/Total: 0/6

Detail performance results: 
+------------+---------+-------------------------------------+
| frame_size | txd/rxd | throughput difference from expected |
+============+=========+=====================================+
| 64         | 256     | -0.150                              |
+------------+---------+-------------------------------------+
| 128        | 256     | -0.006                              |
+------------+---------+-------------------------------------+
| 256        | 256     | -0.065                              |
+------------+---------+-------------------------------------+
| 512        | 256     | 0.010                               |
+------------+---------+-------------------------------------+
| 1024       | 256     | 0.027                               |
+------------+---------+-------------------------------------+
| 1518       | 256     | 0.021                               |
+------------+---------+-------------------------------------+

Ubuntu 18.04
Kernel: 4.15.0-generic
GCC: 7.4
NIC: Mellanox ConnectX-4 Lx 25000 Mbps
Target: x86_64-native-linuxapp-gcc
Fail/Total: 0/6

Detail performance results: 
+------------+---------+-------------------------------------+
| frame_size | txd/rxd | throughput difference from expected |
+============+=========+=====================================+
| 64         | 256     | 0.419                               |
+------------+---------+-------------------------------------+
| 128        | 256     | -0.182                              |
+------------+---------+-------------------------------------+
| 256        | 256     | 0.049                               |
+------------+---------+-------------------------------------+
| 512        | 256     | -0.013                              |
+------------+---------+-------------------------------------+
| 1024       | 256     | 0.011                               |
+------------+---------+-------------------------------------+
| 1518       | 256     | -0.002                              |
+------------+---------+-------------------------------------+

Ubuntu 18.04
Kernel: 4.15.0-generic
GCC: 7.4
NIC: Mellanox ConnectX-5 100000 Mbps
Target: x86_64-native-linuxapp-gcc
Fail/Total: 0/6

Detail performance results: 
+------------+---------+-------------------------------------+
| frame_size | txd/rxd | throughput difference from expected |
+============+=========+=====================================+
| 64         | 256     | -0.083                              |
+------------+---------+-------------------------------------+
| 128        | 256     | 0.156                               |
+------------+---------+-------------------------------------+
| 256        | 256     | 0.109                               |
+------------+---------+-------------------------------------+
| 512        | 256     | 0.078                               |
+------------+---------+-------------------------------------+
| 1024       | 256     | 0.014                               |
+------------+---------+-------------------------------------+
| 1518       | 256     | -0.005                              |
+------------+---------+-------------------------------------+

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