测试代码：1. smart/test/tcpserver/tcpserver.cpp
2. smart/test/examples/latency/
测试环境：CentOS6.7-x86_64 虚拟机(4核，2G内存)
[[email protected] bin_d]$ ./latency_d 127.0.0.1 8800
Usage: ./latency_d server_ip server_port block_size [msg_totalCount]
[[email protected] bin_d]$ ./latency_d 127.0.0.1 8800 16000 10000
s
Press q or Q to exit...
Press q or Q to exit...
--------------done--------------
blocksize = 16000 bytes //每次发送16000字节 ping-ping测试
round-trips = 10000 //10000次轮回
elapsed = 2538[ms]
3938.748 round-trips per second
126.944 latency[us] //测试结果 平均延时 127微秒 ≈ 0.13毫秒
60.101 band width[MB/s]
