https://perf.wiki.kernel.org/index.php/Tutorial
perf manpage 重要！！！http://web.eece.maine.edu/~vweaver/projects/perf_events/programming.html
intel 处理器提供的performance events
http://www.intel.com/content/www/us/en/architecture-and-technology/64-ia-32-architectures-software-developer-vol-3b-part-2-manual.html
http://lenky.info/2012/10/31/perf%E5%88%9D%E8%AF%95%E7%94%A8/
完全参考：
http://www.ibm.com/developerworks/cn/linux/l-cn-perf1/
http://www.ibm.com/developerworks/cn/linux/l-cn-perf2/
https://perf.wiki.kernel.org/index.php/Tutorial
http://lwn.net/Articles/339361/
http://linuxplumbersconf.org/2009/slides/Arnaldo-Carvalho-de-Melo-perf.pdf