https://blog.wongcw.com/2019/08/22/ibm%e9%96%8b%e6%ba%90power%e6%8c%87%e4%bb%a4%e9%9b%86%ef%bc%9a%e5%9c%8b%e7%94%a2%e9%ab%98%e6%80%a7%e8%83%bdcpu%e8%bf%8e%e4%be%86%e6%96%b0%e6%a9%9f%e9%81%87%ef%bc%9f/