_Performance Testing PASS_

Branch: dpdk-next-virtio

9b40cff86458a26e7aac2494971bda7f2ce77997 --> 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     | 0.004                               |
+------------+---------+-------------------------------------+
| 128        | 256     | -0.144                              |
+------------+---------+-------------------------------------+
| 256        | 256     | 0.141                               |
+------------+---------+-------------------------------------+
| 512        | 256     | 0.131                               |
+------------+---------+-------------------------------------+
| 1024       | 256     | -0.049                              |
+------------+---------+-------------------------------------+
| 1518       | 256     | 0.008                               |
+------------+---------+-------------------------------------+

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     | -0.481                              |
+------------+---------+-------------------------------------+
| 128        | 256     | -0.144                              |
+------------+---------+-------------------------------------+
| 256        | 256     | -0.104                              |
+------------+---------+-------------------------------------+
| 512        | 256     | 0.023                               |
+------------+---------+-------------------------------------+
| 1024       | 256     | -0.015                              |
+------------+---------+-------------------------------------+
| 1518       | 256     | -0.002                              |
+------------+---------+-------------------------------------+

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     | 0.302                               |
+------------+---------+-------------------------------------+
| 128        | 256     | -0.058                              |
+------------+---------+-------------------------------------+
| 256        | 256     | -0.024                              |
+------------+---------+-------------------------------------+
| 512        | 256     | 0.048                               |
+------------+---------+-------------------------------------+
| 1024       | 256     | 0.005                               |
+------------+---------+-------------------------------------+
| 1518       | 256     | -0.015                              |
+------------+---------+-------------------------------------+

To view detailed results, visit:
https://lab.dpdk.org/results/dashboard/tarballs/9352/

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