iowait 学习(转载)

https://www.jianshu.com/p/16af532eff06

https://moy.cat/2020/02/%E3%80%8Ciowait%E3%80%8D%E7%A9%B6%E7%AB%9F%E6%98%AF%E4%BB%80%E4%B9%88%EF%BC%9F/#:~:text=%E4%B8%80%E8%A8%80%E4%BB%A5%E8%94%BD%E4%B9%8B,%E7%A9%BA%E9%97%B2%EF%BC%88idle%EF%BC%89%E3%80%81iowait%E3%80%82&text=%E5%BD%93%E6%9F%90%E4%B8%AACPU%20%E5%8F%91%E7%94%9F,%E4%BC%9A%E6%A3%80%E6%9F%A5CPU%20%E6%98%AF%E5%90%A6%E7%A9%BA%E9%97%B2%E3%80%82

https://blog.popkx.com/linux%E7%B3%BB%E7%BB%9Ftop%E5%91%BD%E4%BB%A4%E4%B8%AD%E7%9A%84iowait%E7%A9%B6%E7%AB%9F%E6%98%AF%E4%BB%80%E4%B9%88%E6%84%8F%E6%80%9D/