_Performance Testing PASS_

Branch: dpdk-next-virtio

52f0e9c136d7f5acf8dd1991d9644ed0fa28888e --> performance testing pass

Test environment and result as below:

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     | 0.300                               |
+------------+---------+-------------------------------------+
| 128        | 256     | 0.023                               |
+------------+---------+-------------------------------------+
| 256        | 256     | 0.032                               |
+------------+---------+-------------------------------------+
| 512        | 256     | -0.053                              |
+------------+---------+-------------------------------------+
| 1024       | 256     | 0.006                               |
+------------+---------+-------------------------------------+
| 1518       | 256     | -0.018                              |
+------------+---------+-------------------------------------+

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     | 0.211                               |
+------------+---------+-------------------------------------+
| 128        | 256     | -0.028                              |
+------------+---------+-------------------------------------+
| 256        | 256     | 0.122                               |
+------------+---------+-------------------------------------+
| 512        | 256     | -0.071                              |
+------------+---------+-------------------------------------+
| 1024       | 256     | 0.003                               |
+------------+---------+-------------------------------------+
| 1518       | 256     | 0.004                               |
+------------+---------+-------------------------------------+

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     | -0.553                              |
+------------+---------+-------------------------------------+
| 128        | 256     | -0.100                              |
+------------+---------+-------------------------------------+
| 256        | 256     | -0.020                              |
+------------+---------+-------------------------------------+
| 512        | 256     | -0.036                              |
+------------+---------+-------------------------------------+
| 1024       | 256     | 0                                   |
+------------+---------+-------------------------------------+
| 1518       | 256     | 0.010                               |
+------------+---------+-------------------------------------+

To view detailed results, visit:
https://lab.dpdk.org/results/dashboard/tarballs/7858/

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