_Performance Testing PASS_

Branch: dpdk-next-net

c93792ed3cf3f009f9d2e4ee22533875ca16f507 --> performance testing pass

Test environment and result as below:

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     | 0.6101%                             |
+------------+---------+-------------------------------------+
| 128        | 256     | -0.04833%                           |
+------------+---------+-------------------------------------+
| 256        | 256     | -2.05171%                           |
+------------+---------+-------------------------------------+
| 512        | 256     | 0.57496%                            |
+------------+---------+-------------------------------------+
| 1024       | 256     | 0.0%                                |
+------------+---------+-------------------------------------+
| 1518       | 256     | 0.34517%                            |
+------------+---------+-------------------------------------+

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     | -0.12941%                           |
+------------+---------+-------------------------------------+
| 128        | 256     | 0.30506%                            |
+------------+---------+-------------------------------------+
| 256        | 256     | 0.33833%                            |
+------------+---------+-------------------------------------+
| 512        | 256     | 0.18879%                            |
+------------+---------+-------------------------------------+
| 1024       | 256     | 0.62468%                            |
+------------+---------+-------------------------------------+
| 1518       | 256     | 0.32933%                            |
+------------+---------+-------------------------------------+

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     | 0.03725%                            |
+------------+---------+-------------------------------------+
| 128        | 256     | 1.35302%                            |
+------------+---------+-------------------------------------+
| 256        | 256     | -0.11672%                           |
+------------+---------+-------------------------------------+
| 512        | 256     | -0.20726%                           |
+------------+---------+-------------------------------------+
| 1024       | 256     | -0.05231%                           |
+------------+---------+-------------------------------------+
| 1518       | 256     | 0.29307%                            |
+------------+---------+-------------------------------------+

To view detailed results, visit:
https://lab.dpdk.org/results/dashboard/tarballs/14985/

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