摘要： 经过一番折腾，现总结一下listen的参数backlog。PS：服务端环境：ubuntu12.04。客户端无所谓：我mac os x 10.7。先$ man listen看看，里面有一段话：If the backlog argument is greater than the value in /proc/sys/net/core/somaxconn, then it is silently truncated to that value; the default value in this file is 128. In kernels before 2.4.... 阅读全文