http://blog.csdn.net/moxiaomomo/article/details/6844469
http://miaoo.in/talk-about-unix-io-model.html
http://www.blogjava.net/lihao336/archive/2009/12/27/307430.html
http://blog.csdn.net/moxiaomomo/article/details/6844469
http://miaoo.in/talk-about-unix-io-model.html
http://www.blogjava.net/lihao336/archive/2009/12/27/307430.html