对于客户端,SO_RCVBUF选项须在connect之前设置. 对于服务器,SO_RCVBUF选项须在listen前设置. 2.2 Using in C/C++ int setsockopt(SOCKET s,int level,int optname,const char* optval,int optlen); SOCKET socket = ...intnRcvBufferLen =64*1024;intnSndBufferLen =4*1024*1024;intnLen =sizeof(int);se...
int len = sizeof( recvbuf ); setsockopt( sock, SOL_SOCKET, SO_RCVBUF,&recvbuf, sizeof( recvbuf ) ); getsockopt( sock, SOL_SOCKET, SO_RCVBUF,&recvbuf, ( socklen_t* )&len); printf( "the receive buffer size after settting is %d\n", recvbuf ); int ret = bind( sock, ( struct...
对于服务器,SO_RCVBUF选项须在listen前设置. 2.2 Using in C/C++ int setsockopt(SOCKET s,int level,int optname,const char* optval,int optlen); SOCKET socket=...intnRcvBufferLen=64*1024;intnSndBufferLen=4*1024*1024;intnLen=sizeof(int);setsockopt(socket,SOL_SOCKET,SO_SNDBUF,(char*)&nSndBu...
nettest 4.38Gb/s, 100% 71% 发现注释掉SO_SNDBUF,SO_RCVBUF选项设置后,测得的带宽变小了,发送端的CPU占用率为100%,接收端的CPU为70%,与iperf,nettest的测试结果接近。 查阅:http://bbs.csdn.net/topics/310236933 “SO_SNDBUF和SO_RCVBUF设置系统缓冲区的大小,在接受和发送数据时直接影响系统遍历缓冲区的...
SO_SNDBUF和SO_RCVBUF只是规定了读写缓冲区大小的上限,在实际使用未达到上限前,SO_SNDBUF和SO_RCVBUF是不起作用的。 一个TCP连接占用的内存相当于读写缓冲区实际占用内存大小之和。与滑动窗口的关系?接收缓存区和接受滑动窗口关系接收缓存区包含了滑动窗口,即接收缓存区大小>= 滑动窗口大小。接受缓冲区的数据主要分...
SO_SNDBUF和SO_RCVBUF 这两个选项就是设置和获取缓冲区的大小,看代码吧。 发送缓冲区: [mapan@localhost unixNetwork]$ cat test.cpp #include <unistd.h> #include <sys/types.h> #include <sys/socket.h> #include <netdb.h> #include <stdio.h>...
简介:SO_RCVBUF和SO_SNDBUF默认值 内核: cat /proc/version Linux version 2.6.32-431.23.3.el6.centos.plus.x86_64 (mockbuild@c6b9.bsys.dev.centos.org) (gcc version 4.4.7 20120313 (Red Hat 4.4.7-4) (GCC) ) #1 SMP Wed Jul 30 00:12:13 UTC 2014 ...
Expected behavior Value of the ChannelOption SO_SNDBUF and SO_RCVBUF is the same with which I set. Actual behavior do not take effect, the value is same with which of OS Steps to reproduce initialize the BootStrap&ServerBootStrap with sp...
时延20ms，一个SQL查询了22M数据出现10倍+的信息延迟，不正常。）希望，你也能从中得到启发。
bootstrap.childOption(ChannelOption.SO_RCVBUF, 1048576);bootstrap.childOption(ChannelOption.SO_SNDBUF, 1048576);} From source file:org.wenxueliu.netty.client.ClientTest.java License:Apache License privatevoidconnectRetry(Stringip,intport, ChannelFutureListener clientConnectionListener) {try{/*fromwww.java...