_Performance Testing PASS_

Branch: dpdk-next-net

e50ca76c69f00a610195d194299d828b07633d48 --> performance testing pass

Test environment and result as below:

Ubuntu 18.04
Kernel: 4.15.0-generic
Compiler: 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     | -0.06948%                           |
+------------+---------+-------------------------------------+
| 128        | 256     | 0.27546%                            |
+------------+---------+-------------------------------------+
| 256        | 256     | 0.30455%                            |
+------------+---------+-------------------------------------+
| 512        | 256     | 0.1814%                             |
+------------+---------+-------------------------------------+
| 1024       | 256     | -0.13379%                           |
+------------+---------+-------------------------------------+
| 1518       | 256     | 0.38782%                            |
+------------+---------+-------------------------------------+

Ubuntu 18.04
Kernel: 4.15.0-generic
Compiler: 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     | 0.80927%                            |
+------------+---------+-------------------------------------+
| 128        | 256     | 0.40046%                            |
+------------+---------+-------------------------------------+
| 256        | 256     | -0.90037%                           |
+------------+---------+-------------------------------------+
| 512        | 256     | 0.54324%                            |
+------------+---------+-------------------------------------+
| 1024       | 256     | -0.03347%                           |
+------------+---------+-------------------------------------+
| 1518       | 256     | 0.04933%                            |
+------------+---------+-------------------------------------+

Ubuntu 18.04
Kernel: 4.15.0-generic
Compiler: 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     | 0.28253%                            |
+------------+---------+-------------------------------------+
| 128        | 256     | 1.14051%                            |
+------------+---------+-------------------------------------+
| 256        | 256     | 0.02192%                            |
+------------+---------+-------------------------------------+
| 512        | 256     | -0.13306%                           |
+------------+---------+-------------------------------------+
| 1024       | 256     | -0.14617%                           |
+------------+---------+-------------------------------------+
| 1518       | 256     | 0.0%                                |
+------------+---------+-------------------------------------+

To view detailed results, visit:
https://lab.dpdk.org/results/dashboard/tarballs/15066/

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