https://fastthread.io 可用于分析Java Thread Dump文件
http://www.bitmover.com/lmbench/ CPU上下文切换耗时分析
参考：
https://www.cnblogs.com/xqzt/p/5448983.html
https://segmentfault.com/a/1190000010973341?utm_source=tag-newest
http://blog.yufeng.info/archives/753