Multiprogramming is one of the most basic types of parallel processing that can be used in many different environments. Essentially, it makes it possible for multiple programs to be active at the same time, while still running through a single processor. Its functionality in this environment involves a continuous process of sequentially performing tasks associated with one program’s function and then proceeding to perform a task associated with the next program.
One of the benefits of multiprogramming is that the user will experience little or no delay when moving from one application to another.
This type of processing is very different from multiprocessing because, although there may be several programs currently active, the uniprocessor does not execute commands for all programs simultaneously. Instead, the processor goes to each program, executes a single command, and then moves on to the next program in the queue. The above program remains active but enters a passive state until the uniprocessor returns to the front of the queue and executes a second command.
Memory is very important for multiprogramming.
From the perspective of the end user, the process is seamless. As far as actual functionality is concerned, the user appears to be using several different apps at the same time. This is because multiprogramming uses the uniprocessor to quickly execute commands. The end result is that a user experiences little or no delay when minimizing one application to perform a task associated with a different application.
The multiprogramming mechanism is known as an interrupt. Each task is allotted a specific amount of time for processing before the operating systems move on to the next program and the next task. In a way, this method is about juggling several tasks at once, quickly performing a part of the required action, and then moving on to doing something with a different task before returning to the previous work.
Memory is important for this form of processing to work properly. There must be enough capacity to ensure that if a program in the rotating queue encounters a problem, it does not prevent delays or affect the operation of other open applications. At the same time, there must be some kind of memory protection. If that’s not the case, a problem with one app can create a domino effect that closes or at least causes the other apps to open.
