epoll com

Select and epoll in Multi-I/O multiplexing in linux, and epoll in multiple IO multiplexing Select and epoll are IO multiplexing mechanisms. I/O multiplexing uses a mechanism to monitor multiple descriptors. Once a descriptor is ready (generally read or write), it can notify the program to perform corresponding read/write operations. However, select, poll, and

In Linux network programming, select is used for event triggering for a long time. In the new Linux kernel, epoll is a mechanism to replace it. Compared with select, epoll does not reduce the efficiency as the number of FD listeners increases. in the select implementation in the kernel, it uses Round Robin to process data. The more data in the round-robin FD, the more time it will naturally take. Three

epoll_create system Call int epoll_create (int size); Epoll_create returns a handle, and the use of Epoll will be identified by this handle, the argument size is the number of approximate events to tell Epoll to handle, and the close handle must be called when the epoll is no longer used. Size This parameter simply tells the kernel the approximate number of eve

The Epoll is the poll of the Linux kernel to handle high concurrency and is an enhanced version of the Select/poll for Linux under multiplexed IO interfaces. Here the main talk about the difference between Epoll and the other two, in addition to epoll a simple application of the example said. (a) Epoll has the main dif

Http://www.cnblogs.com/venow/archive/2012/11/30/2790031.htmlhttp://blog.csdn.net/denkensk/article/details/41978015Definition:　　The Epoll is an enhanced version of the Linux kernel for processing large numbers of handles and is a poll of the Linux Select/poll IO interface, which significantly reduces the CPU utilization of the program in cases where there is only a small amount of activity in a large number of concurrent connections. Because it will re

Http://www.cnblogs.com/venow/archive/2012/11/30/2790031.htmlhttp://blog.csdn.net/denkensk/article/details/41978015Definition:　　The Epoll is an enhanced version of the Linux kernel for processing large numbers of handles and is a poll of the Linux Select/poll IO interface, which significantly reduces the CPU utilization of the program in cases where there is only a small amount of activity in a large number of concurrent connections. Because it will re

Previously read this article about Epoll, and now turned out to see a bit, a long time not to see the knowledge is easy to forget Ah, although the project is not used Epoll but there is time to make a simple version of their own, so as to remember the prison.Original source: Http://blog.163.com/[email protected]/blog/static/73483745201181824629285/A new way to im

Linux network communication has launched the Select, poll, Epoll three modes. Select has the following three questions:(1) Each time a select is called, the FD collection needs to be copied from the user state to the kernel state, which is very expensive when FD is very large.(2) At the same time, each call to select requires the kernel to traverse all of the FD that is passed in, which is also very expensive when FD is very large.(3) The number of f

High-concurrency epoll + thread pool, epoll in the thread pool-ehyyngp-chinaunix blog High-concurrency epoll + thread pool, epoll in the thread pool 21:53:38 Category:Linux Epoll is a perfect solution for High-concurrency servers in Linux. Because it is triggered b

In the previous article, we will talk about epoll functions and performance. This article uses these functions to give the simplest epoll example. 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495969798991001011021031041051061071081091101111121131141151161171181191201

This article is written by the carefree son, forwarded please mark the original site:http://blog.csdn.net/houjixin/article/details/46413583Orhttp://houjixin.blog.163.com/blog/static/3562841020155835146428/#The original mosquito in the mobile internet situation, its performance is not high, the actual operation of a mosquito instance can support 20,000 connection is good; Mosquitto in the case of bad network condition, with the increase of user volume,

state to the kernel state copy once, and to the device to wait for the queue to hang once, and epoll as long as a copy, and the current to wait for the queue is hung only once (in Epoll_ At the start of wait, note that the wait queue here is not the device waiting queue, just a epoll internally defined wait queue. This can also save a lot of overhead.Resources:Http://www.cnblogs.com/apprentice89/archive/20

to the kernel state copy once, and to the device to wait for the queue to hang once, and epoll as long as a copy, and the current to wait for the queue is hung only once (in Epoll_ At the start of wait, note that the wait queue here is not the device waiting queue, just a epoll internally defined wait queue. This can also save a lot of overhead.Resources:Http://www.cnblogs.com/apprentice89/archive/2013/05/

queue to hang once, and epoll as long as a copy, and the current to wait for the queue is hung only once (in Epoll_ At the start of wait, note that the wait queue here is not the device waiting queue, just a epoll internally defined wait queue. This can also save a lot of overhead.Resources:Http://www.cnblogs.com/apprentice89/archive/2013/05/09/3070051.htmlHttp://www.linuxidc.com/Linux/2012-05/59873p3.htmh

Since: http://www.vckbase.com/document/viewdoc? Id = 212 The purpose of this article is to provide a programming guide for programmers who have just come into contact with COM and help them understand the basic concepts of COM. The content includes the com standard introduction, important com terms, and how to reuse

queue to hang once, and epoll as long as a copy, and the current to wait for the queue is hung only once (in Epoll_ At the start of wait, note that the wait queue here is not the device waiting queue, just a epoll internally defined wait queue. This can also save a lot of overhead.Resources:Http://www.cnblogs.com/apprentice89/archive/2013/05/09/3070051.htmlHttp://www.linuxidc.com/Linux/2012-05/59873p3.htmh