CentOS7 系統默認的 CPUPOWER 策略是 powersave 節能模式，Google 了非常多的資料，一直沒有找到解決辦法，現在分享一下。
執行：
tuned-adm profile throughput-performance
查看 CPU 核心的實時頻率：
watch -n 1 "cat /proc/cpuinfo | grep MHz"
相關資料：
- https://community.centminmod.com/threads/some-performance-optimization-tips-on-centos.8946/
- https://huataihuang.gitbooks.io/cloud-atlas/os/linux/redhat/system_administration/systemd/cpupower.html
- https://blog.sleeplessbeastie.eu/2015/11/09/how-to-set-cpu-governor-at-boot/
- https://www.cnblogs.com/276815076/p/6477562.html