https://blog.wongcw.com/2020/06/07/amd%ef%bc%9asmartshift%e6%8a%80%e8%a1%93%e4%bb%8a%e5%b9%b4%e8%a2%ab%e4%b8%80%e6%ac%be%e6%88%b4%e7%88%be%e7%ad%86%e8%a8%98%e6%9c%ac%e7%8d%a8%e5%8d%a0/