[dpdk-users] multi core performance problem

[Sepehr Nazary]

Hi
I run dpdk multi_process (symetric_mp) example and see this result:

NumberOfCore  Throughput
1              9986
2              9987
3              9808
4              9988
5              9645
6              9171
7              9030
8              8517
9              8537
10              8415
11              7832
12              7985
13              7569
14              7285
15              7624
16              6994

I run pktgen with range on and packet size is 64 byte.
I sure RSS works correctly and packets are distributed uniformly between
cores. Packet drops is 0, as well.

Why performance decrease ??

configuration :
dpdk-2.2.0, pktgen 3.0.0
NIC model : 82599ES 10-Gigabit
CPU model : Intel(R) Xeon(R) CPU E5-2699 v3 @ 2.30GHz
Linux version 3.16.0-4-amd64
Two NUMA Node:
socket 0 : 16G RAM , 18 CORE , 2 NIC ,run DPDK symetric_mp example
socket 1 : 16G RAM , 18 CORE , 2 NIC ,run Pktgen (range on)