_Performance Testing issues_

Branch: dpdk

83a124fb73c50b051ee20ef6b1998c81be7e65df --> performance testing fail

Test environment and result as below:

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     | 3.073                               |
+------------+---------+-------------------------------------+
| 128        | 256     | 4.290                               |
+------------+---------+-------------------------------------+
| 256        | 256     | 1.868                               |
+------------+---------+-------------------------------------+
| 512        | 256     | -0.088                              |
+------------+---------+-------------------------------------+
| 1024       | 256     | -0.009                              |
+------------+---------+-------------------------------------+
| 1518       | 256     | -0.009                              |
+------------+---------+-------------------------------------+

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     | -0.093                              |
+------------+---------+-------------------------------------+
| 128        | 256     | 2.429                               |
+------------+---------+-------------------------------------+
| 256        | 256     | 0.022                               |
+------------+---------+-------------------------------------+
| 512        | 256     | -0.074                              |
+------------+---------+-------------------------------------+
| 1024       | 256     | -0.014                              |
+------------+---------+-------------------------------------+
| 1518       | 256     | -0.017                              |
+------------+---------+-------------------------------------+

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: 1/6

Detail performance results: 
+------------+---------+-------------------------------------+
| frame_size | txd/rxd | throughput difference from expected |
+============+=========+=====================================+
| 64         | 256     | -0.727                              |
+------------+---------+-------------------------------------+
| 128        | 256     | -0.603                              |
+------------+---------+-------------------------------------+
| 256        | 256     | -1.039                              |
+------------+---------+-------------------------------------+
| 512        | 256     | -0.076                              |
+------------+---------+-------------------------------------+
| 1024       | 256     | -0.024                              |
+------------+---------+-------------------------------------+
| 1518       | 256     | -0.044                              |
+------------+---------+-------------------------------------+

https://lab.dpdk.org/results/dashboard/tarballs/5539/

UNH-IOL DPDK Performance Test Lab

To manage your email subscriptions visit: 
https://lab.dpdk.org/results/dashboard/preferences/subscriptions/