内核介绍:https://zhuanlan.zhihu.com/p/342056802
性能优化:https://github.com/crydemon/Thinking_in_Java_MindMapping/blob/master/2020-04-14%20%E6%80%9D%E7%BB%B4%E5%AF%BC%E5%9B%BE%E5%AD%A6%E3%80%8ALinux%E6%80%A7%E8%83%BD%E4%BC%98%E5%8C%96%E5%AE%9E%E6%88%98%E3%80%8B.md