_Performance Testing PASS_

Branch: dpdk-next-virtio

1e8787ac08f4d3573691b334e3532fe22969e86d --> 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     | 0.665                               |
+------------+---------+-------------------------------------+
| 128        | 256     | 0.203                               |
+------------+---------+-------------------------------------+
| 256        | 256     | -0.123                              |
+------------+---------+-------------------------------------+
| 512        | 256     | 0.099                               |
+------------+---------+-------------------------------------+
| 1024       | 256     | 0.130                               |
+------------+---------+-------------------------------------+
| 1518       | 256     | -0.041                              |
+------------+---------+-------------------------------------+

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     | -0.367                              |
+------------+---------+-------------------------------------+
| 128        | 256     | -0.120                              |
+------------+---------+-------------------------------------+
| 256        | 256     | 0.014                               |
+------------+---------+-------------------------------------+
| 512        | 256     | 0.015                               |
+------------+---------+-------------------------------------+
| 1024       | 256     | -0.017                              |
+------------+---------+-------------------------------------+
| 1518       | 256     | 0.001                               |
+------------+---------+-------------------------------------+

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     | -0.140                              |
+------------+---------+-------------------------------------+
| 128        | 256     | -0.096                              |
+------------+---------+-------------------------------------+
| 256        | 256     | -0.059                              |
+------------+---------+-------------------------------------+
| 512        | 256     | -0.006                              |
+------------+---------+-------------------------------------+
| 1024       | 256     | 0.001                               |
+------------+---------+-------------------------------------+
| 1518       | 256     | 0.005                               |
+------------+---------+-------------------------------------+

To view detailed results, visit:
https://lab.dpdk.org/results/dashboard/tarballs/9463/

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