Cpu Usage and best perforamnce

Hi Dear friends I have Unbound v 1.6.6 install from epel on centos 7 and have 2 cpu

Model name: Intel(R) Xeon(R) CPU X5650 @ 2.67GHz

I config Threath 24
one threath over Core

NUMA node0 CPU(s): 0,2,4,6,8,10,12,14,16,18,20,22
NUMA node1 CPU(s): 1,3,5,7,9,11,13,15,17,19,21,23

For my dns Recursive and cache i used Dns walking tree and used root.hint
htop show my cpu 41%

Now how get best preformance For rapid response for Customer???

thanks