https://blog.wongcw.com/2019/10/15/arm%e5%b0%87%e7%82%ba%e8%98%8b%e6%9e%9c%e9%96%8b%e7%99%bc%e9%ab%98%e6%80%a7%e8%83%bdcpu%e6%a0%b8%e5%bf%83%e5%8f%96%e4%bb%a3%e7%ad%86%e8%a8%98%e6%9c%acx86%e8%99%95%e7%90%86%e5%99%a8%ef%bc%9f/