socket poll

With the full support of the 2.6 kernel to epoll, many articles and sample code on the network provide a message that using Epoll instead of the traditional poll can bring a performance boost to Web service applications. But most of the reasons for

1 select function int select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout);1.1 parameter description the first parameter NFDs is the maximum descriptor value added to the fdset set by 1. fdset is

Socket programming, communicationClient socket ()----->connect ()------->recv ()-----> Close ();Server-side sockets ()----->bind ()------> Listen ()---->accept ()------>send ()------->close ();1> socket (int family,int type,int protocol);Family,

As in the first part of the previous article, these words are designed to help others or to clear their mind. Rather than the so-called source code analysis. To analyze the source code, or direct debug source code is the best, see no matter what

Linux Kernel 3.11 socket busy poll mechanism to avoid sleep switching, 3.11 pollThe network protocol stack of Linux is very independent. The upstream and downstream interfaces are connected to the user State and devices respectively. They can also

And the first part of the previous article, the text is to help others or their own ideas, rather than the so-called source analysis, want to analyze the source code, or direct debug source is the best, see any document and books are the worst.

Socket Programming The word socket can represent a number of concepts, in the TCP/IP protocol "IP address + TCP or UDP port number" uniquely identify a process in network communications, "IP + port number" is called the socket. In the TCP protocol,

The following article in this period of time to study the implementation of the kernel of Select/poll/epoll experience: Select,poll,epoll are multiplexing IO functions, simply in a thread, you can handle multiple file descriptors at the same time

SelectThe essence is to use 32-bit 32-bit integer, that is, 32*32 = 1024, And the FD value is 1-1024. When the FD value exceeds the 1024 limit, you must modify the fd_setsize. In this case, you can identify the FD in the 32 * max value range.

Socket programming practices in Linux (8) Select restrictions and poll (preliminary knowledge of concurrency)Select restrictions The number of concurrent servers implemented by the select statement is generally restricted by the following two