_Performance Testing issues_

Branch: dpdk

557c5cbde374172c7140bc6a7cef2cc81e5a29dc --> performance testing fail

Test environment and result as below:

Ubuntu 16.04
Kernel: 4.4.0-109-generic
GCC: 5.4.0-6ubuntu1~16.04.6
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     | 0.325                               |
+------------+---------+-------------------------------------+
| 128        | 256     | -0.132                              |
+------------+---------+-------------------------------------+
| 256        | 256     | -0.064                              |
+------------+---------+-------------------------------------+
| 512        | 256     | 0.021                               |
+------------+---------+-------------------------------------+
| 1024       | 256     | 0                                   |
+------------+---------+-------------------------------------+
| 1518       | 256     | 0.009                               |
+------------+---------+-------------------------------------+

Ubuntu 16.04
Kernel: 4.4.0-109-generic
GCC: 5.4.0-6ubuntu1~16.04.6
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     | -0.392                              |
+------------+---------+-------------------------------------+
| 128        | 256     | 0.001                               |
+------------+---------+-------------------------------------+
| 256        | 256     | 0.022                               |
+------------+---------+-------------------------------------+
| 512        | 256     | 0.033                               |
+------------+---------+-------------------------------------+
| 1024       | 256     | 0.044                               |
+------------+---------+-------------------------------------+
| 1518       | 256     | -0.093                              |
+------------+---------+-------------------------------------+

Ubuntu 16.04
Kernel: 4.4.0-109-generic
GCC: 5.4.0-6ubuntu1~16.04.6
NIC: Mellanox ConnectX-4 Lx 25000 Mbps
Target: x86_64-native-linuxapp-gcc
Fail/Total: 1/6

Detail performance results: 
+------------+---------+-------------------------------------+
| frame_size | txd/rxd | throughput difference from expected |
+============+=========+=====================================+
| 64         | 256     | -1.017                              |
+------------+---------+-------------------------------------+
| 128        | 256     | -0.156                              |
+------------+---------+-------------------------------------+
| 256        | 256     | -0.004                              |
+------------+---------+-------------------------------------+
| 512        | 256     | -0.025                              |
+------------+---------+-------------------------------------+
| 1024       | 256     | 0.004                               |
+------------+---------+-------------------------------------+
| 1518       | 256     | -0.011                              |
+------------+---------+-------------------------------------+

https://lab.dpdk.org/results/dashboard/tarballs/4910/

UNH-IOL DPDK Performance Test Lab

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