所以,blocking IO的特点就是在IO执行的两个阶段都被block了。 三、non-blocking IO linux下,可以通过设置socket使其变为non-blocking。当对一个non-blocking socket执行读操作时,流程是这个样子: 从图中可以看出,当用户进程发出read操作时,如果kernel中的数据还没有准备好,那么它并不会block用户进程,而是立刻返回一...
这个图和blocking IO的图其实并没有太大的不同,事实上还更差一些。因为这里需要使用两个系统调用(select和recvfrom),而blocking IO只调用了一个系统调用(recvfrom)。但是,用select的优势在于它可以同时处理多个connection。 强调: 1. 如果处理的连接数不是很高的话,使用select/epoll的web server不一定比使用multi-t...
Socket A 是 毒龙、闪龙、速龙XP 的接口,462针 Socket AM2 是现在双核的接口，940针 这个Socket 的意思就是插座，针脚在CPU上。
The WSAAsyncSelect and WSAEventSelect functions automatically set a socket to nonblocking mode. If WSAAsyncSelect or WSAEventSelect has been issued on a socket, then any attempt to use ioctlsocket to set the socket back to blocking mode will fail with WSAEINVAL. To set the socket back to blockin...
A blocking Windows Sockets 1.1 call is in progress, or the service provider is still processing a callback function. WSAEINTR The (blocking) Windows Socket 1.1 call was canceled through WSACancelBlockingCall. WSAEWOULDBLOCK The socket is marked as nonblocking, but the l_onoff member of the linger...
socket_set_block() - Sets blocking mode on a socket socket_set_option() - Sets socket options for the socket stream_set_blocking() - 为资源流设置阻塞或者阻塞模式User Contributed Notes 1 note up down 6 kpobococ at gmail dot com ¶ 12 years ago Beware, when using this function ...
2)OIO - Old blocking I/O OIO就是java中提供的Socket接口,java最开始只提供了阻塞的Socket,阻塞会导致程序性能低。下面是OIO的处理流程图,若想详细了解,可以参阅其他相关资料。 3)Local - In VM transport Netty包含了本地传输,这个传输实现使用相同的API用于虚拟机之间的通信,传输是完全异步的。每个Channel使用唯...
The WSAAsyncSelect and WSAEventSelect functions automatically set a socket to nonblocking mode. If WSAAsyncSelect or WSAEventSelect has been issued on a socket, then any attempt to use ioctlsocket to set the socket back to blocking mode will fail with WSAEINVAL. ...
WouldBlock An operation on a nonblocking socket cannot be completed immediately. InProgress A blocking operation is in progress. AlreadyInProgress The nonblocking Socket already has an operation in progress. NotSocket A Socket operation was attempted on a non-socket. DestinationAddressRequired ...
If you make a nonblocking call toConnect, writability means that you have connected successfully. If you already have a connection established, writability means that all send operations will succeed without blocking. If you have made a non-blocking call toConnect, thecheckerrorparameter identifies ...