跟踪php程序CPU100%
1.php扩展phptrace分析
https://github.com/Qihoo360/phptrace/blob/master/README_ZH.md
2.gdb命令分析
http://www.syyong.com/php/Using-strace-GDB-and-tcpdump-debugging-tools-in-PHP.html
http://rango.swoole.com/archives/325
http://rango.swoole.com/archives/340
3.使用官方提供的.gdbinit
https://phpor.net/blog/post/997