_Performance Testing issues_

Branch: dpdk-next-net-intel

91d6fe1c97a9b0cb7dd0fa41c44c3c5426c532be --> performance testing fail

Test environment and result as below:

Ubuntu 18.04
Kernel: 4.15.0-generic
GCC: 7.4
NIC: Intel Corporation Ethernet Converged Network Adapter XL710-QDA2 40000 Mbps
Target: x86_64-native-linuxapp-gcc
Fail/Total: 0/0

Detail performance results: 
There were no deltas reported. There may have been an issue with the test harness. If logs are available, download them from the ci website for more information.

Ubuntu 18.04
Kernel: 4.15.0-generic
GCC: 7.4
NIC: Intel Corporation Ethernet Converged Network Adapter 82599ES 10000 Mbps
Target: x86_64-native-linuxapp-gcc
Fail/Total: 0/3

Detail performance results: 
+------------+---------+-------------------------------------+
| frame_size | txd/rxd | throughput difference from expected |
+============+=========+=====================================+
| 64         | 128     | 0.212                               |
+------------+---------+-------------------------------------+
| 64         | 512     | 0.101                               |
+------------+---------+-------------------------------------+
| 64         | 2048    | -0.137                              |
+------------+---------+-------------------------------------+

https://lab.dpdk.org/results/dashboard/tarballs/7543/

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