linux direct io example

On a "chat chat synchronous, asynchronous, blocking and non-blocking" has been popular explanation, to understand the synchronous, asynchronous, blocking and non-blocking important two conceptual points, have not seen, it is recommended to read this

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Netty Series (i) Linux network IO Model I. BASIC conceptBefore formally starting the Linux IO model, let's introduce 5 basic concepts.1.1 User space and kernel spaceNow that the operating system is using virtual memory, the 32-bit operating system,

I have known asynchronous IO for a long time, but it has not been used recently to solve the actual problem (in a CPU-intensive application, some data to be processed may be stored on the disk. The location of the data is known in advance, so an

Introduction to an IO modelTo better understand the IO model, we need to review it in advance: synchronous, asynchronous, blocking, non-blockingWhat is the difference between synchronous (synchronous) IO and asynchronous (asynchronous) Io, what is

Issues in the previous section:Co-process: switch on IO operation.But when do you cut it back? How do I know I'm done with IO?first, the event-driven model introductionTypically, when we write a program that server processes a model, there are

Reprinted from http://blog.csdn.net/zhoudaxia/article/details/8974779What is the difference between synchronous (synchronous) IO and asynchronous (asynchronous) Io, what is blocking (blocking) IO and non-blocking (non-blocking) IO respectively? The

What is the difference between synchronous (synchronous) IO and asynchronous (asynchronous) Io, what is blocking (blocking) IO and non-blocking (non-blocking) IO respectively? The problem is that different people may give different answers, such as

IO Model IntroductionTo better understand the IO model, we need to review it in advance: synchronous, asynchronous, blocking, non-blockingWhat is the difference between synchronous (synchronous) IO and asynchronous (asynchronous) Io, what is

Event-driven introduction in general, when we write a server process model, there are several models: (1) Each request is received, a new process is created to process the request, (2) Each request is received, a new thread is created to process the