What is real time vs. non real time? Is real time meant at any time?

Real-time has relatively high requirements for response time, for example: you double-click to run a program, there are two situations1Open immediately (respond e.g. promptly)2

It took half a day to open (the response was not timely) due to various reasons, the response is required to be timely (may be accurate in milliseconds), that is, real-time, such as the aviation booking system, rocket launch, real-time (the response time is relatively high) non-real-time is not so high.

Real-time is always running and monitoring memory changes; Non-real-time is running only when needed.

First understand the single thread: run a line from beginning to end.

Multi-threading: Multiple channels are parallel and do not interfere with each other.

At this time, the question arises, does multi-channel parallelism really not interfere with each other? No one knows. So there's a real-time vs. non-real-time argument.

Real-time is to call functiona(), and when the function returns, operation A must have been completed. Non-real-time means that functionb() is called, and the operation is not completed when the function is returned, but at some point in the future.

Similar concepts, blocking, non-blocking.

Real-time, no time limit Non-real-time, a certain period of time.

That is, you can interact with the machine, you give the machine a command, and it will respond immediately The real-time system is generally a dedicated embedded operating system, which can respond to various emergencies and interruptions in real time. The CPU's process scheduling strategy is usually deprivable, prioritized, and must be robust, i.e., it can handle error situations well and get the right result, at least not give the wrong result or crash outright. Real-time systems are used where responsiveness and performance are critical.

PJ References.

Real-time means different from anytime. Real-time is an adverb that means to synchronize (do something) at the actual time when something happens, develops. So it's essentially different from any time.

And at any time means: to adapt to the times; Timely and timely. It's about doing something at the right time. Another layer means: at any time; No matter what time it is. Refers to the fact that there is no time limit.

Examples of real-time meaning:

Characteristics of real-time meaning: Anytime you go to visit, for example, if you go to see it at 9 o'clock in the morning, then real-time means to 9 o'clock, and if you go to see it at 2 o'clock in the afternoon, then the real-time time at this time is 2 o'clock.

Characteristics of any time: When doing one thing, you are not limited by anything, you only need to do it immediately, but at any time and sometimes you can do it immediately, immediately, and it is more flexible in time.

The above content reference: Encyclopedia - real-time.

The above content reference: Encyclopedia - anytime.

Non-real-time of course means that you send him a message, and it takes longer for him to reply, such as the message just sent today, and then he will reply to you a few hours after he has no friends, which also belongs to the category of non-real-time.

A brief explanation of the current communication software is to use QQ and other tools to communicate, although it is convenient, when the two parties to the communication are not connected to the Internet at the same time, or the content of the exchange cannot be responded to in real time, people will use non-real-time communication methods to observe the state of communication. Currently, email, BBS (forum), and blog (blog) are the most popular non-real-time communication methods.

Summary. Hello, non-instant messaging is not real-time** means that the participants are sometimes unable to communicate in real time during the same period of time. For example, sending emails, text messages, etc., there needs to be a certain delay to receive the message, and it is not possible to get an immediate response.

If it is real-time, both parties can communicate and interact at any time, such as QQ, WeChat, Skype, etc. Nowadays, more and more companies are beginning to value real-time communication in order to better carry out group work and communicate effectively with customers. Enterprises should set up a real-time communication system, and review its functions, stability and security to ensure the real-time and efficient communication between work and customers.

In addition, companies should take steps to ensure that communication is secure and avoid the risk of information leakage.

What about people. Hello, non-instant messaging is not real-time** means that the participants are sometimes unable to communicate in real time during the same period of time. For example, sending emails, text messages, etc., there needs to be a certain delay to receive the message, and it is not possible to get an immediate response.

If it is real-time, the two parties can communicate and interact at any time, such as QQ, WeChat, Skype, etc. Nowadays, more and more enterprises are beginning to pay attention to real-time and early morning data in order to better carry out group work and effective communication with customers. Enterprises should set up a set of real-time communication system, and review its function, stability and security to ensure the real-time and efficient communication between work and customers.

In addition, companies should take steps to ensure that communication is secure and avoid the risk of information leakage.

Dear, yes.

Summary. Dear, I'm glad to answer for you, non-instant messaging refers to a form of communication in which the delivery of messages is not real-time, i.e., the receipt and sending of messages does not require both parties to communicate at the same time. <>

Here's why:1Compared with instant messaging, non-instant messaging is more flexible and can better adapt to different communication scenarios and needs.

2.In non-instant messaging, the message sender can send the message to the offline storage area of the message receiver's device and wait for the receiver's device to go online before pushing. This method can not only reduce the real-time time of both parties, but also ensure the timely arrival and interaction of messages.

3.Typical non-instant messaging apps include email, text messaging, social networking, and forums. The main advantage of non-instant messaging over instant messaging is that both parties have more flexibility in scheduling time and resources, and can better manage and process the content of the communication.

Dear, I'm glad to answer for you, non-instant messaging refers to a form of communication in which the delivery of messages is not real-time, i.e., the receipt and sending of messages does not require both parties to communicate at the same time. <>

Here's why:1Compared with instant messaging, non-instant messaging is more flexible and can better adapt to different communication scenarios and needs.

2.In non-instant messaging, the message sender can send the message to the offline storage area of the message receiver's device and wait for the receiver's device to go online before pushing. This method can not only reduce the real-time time of both parties, but also ensure the timely arrival and interaction of messages.

3.Typical non-instant messaging apps include email, text messaging, social networking, and forums. The main advantage of non-instant messaging over instant messaging is that both parties can be more flexible in how they can arrange their time and resources, and better manage and process the content of the communication.

Big Red Flower Bi Noisy].

Therefore, when conducting non-instant messaging, you need to wait patiently for the other party's reply to avoid unnecessary misunderstandings. 2.The requirements for network stability are high, and non-instant messengers often need to transmit over the network, so the requirements for network stability are high.

In the case of poor or unstable network, message transmission will fail or be delayed, so you need to pay attention to the network environment. 3.Privacy protection needs to be paid attention to, non-instant messaging tools will store users' chat records and file information, so it is necessary to pay attention to privacy protection issues.

When choosing a non-instant messaging tool, you need to understand its privacy policy, data security, and avoid the disclosure of personal information. 4.Attention needs to be paid to the security of information transmission, and non-instant messaging tools often need to transmit messages, so the security of information transmission needs to be paid attention to.

When transmitting sensitive information, it is necessary to use encrypted transmission methods to prevent information from being stolen or tampered with. 5.Version updates need attention, non-instant messaging tools will update versions from time to time, so you need to pay attention to version update information and update the version in time to ensure the stability and security of software functions.

POSIX defines a real-time system as the ability of a system to provide the required level of service within a defined response time. A more accepted definition, proposed by Donald Gillies, is:

A real-time system means that the correctness of the calculations depends not only on the logical correctness of the program, but also on the time when the results are generated, and if the time constraints of the system are not met, system errors will occur.

Real-time systems can be divided into two types: soft real-time and hard real-time. A hard real-time system is a worst-case service time that the system has to ensure that the deadline for response time to an incident must be met anyway. For example, the control of spaceships in space is such a system in reality.

All other systems with real-time characteristics can be called soft real-time systems. If we are clear, soft real-time systems are those that statistically speaking, a task (in the following discussion, we will not distinguish between tasks and processes) can be processed with a guaranteed processing time, and the events that arrive at the system can be processed before the deadline is reached, but the violation of the deadline does not lead to fatal errors, such as a real-time multi-** system is a kind of soft real-time system.

In order for a computer system to provide real-time support, its operating system must efficiently schedule and manage CPUs and other resources. In a multitasking real-time system, the scheduling and management of resources is more complex.

A system that responds in a timely manner to external events.