The Multitasking activities are more costlier than the Multithreading ones because the hardware dependence is more for the multitasking phenomenon which directly increases the cost for efficient performance.
The Multithreading activities are less costlier than Multitasking, this is because these are based on scheduling which is completely based on the software front and can be customized for almost all scenarios.
When a machine or computer performs a variety of activities such as tasks, programs, etc. Multitasking is performed by allocating small slice of CPU time to each process and switching them back and forth to create the illusion of parallel execution. In other words, a CPU performs activities for a particular duration and then again changes.
This process is so rapid that the user cannot tell any difference. Each tasks uses memory and other resources. Therefore, multiple tasks put overhead on CPU and if there are too many tasks in execution , the speed of the system gradually slows down. The process of executing multiple threads simultaneously is known as multithreading.
It can be viewed as multitasking at programmatic level. It aims at reducing the execution time of a program and helps in obtaining efficient program. Notify me of follow-up comments by email. To perform multitasking, the CPU switches among theses tasks very frequently so that user can interact with each program simultaneously. In a multitasking operating system, several users can share the system simultaneously. As we saw the CPU rapidly switches among the tasks, so a little time is needed to switch from one user to the next user.
This puts an impression on a user that entire computer system is dedicated to him. When several users are sharing a multitasking operating system, CPU scheduling and multiprogramming makes it possible for each user to have at least a small portion of Multitasking OS and let each user have at least one program in the memory for execution. Multithreading is different from multitasking in a sense that multitasking allows multiple tasks at the same time, whereas, the Multithreading allows multiple threads of a single task program, process to be processed by CPU at the same time.
Before studying multithreading let us talk about what is a thread? A thread is a basic execution unit which has its own program counter, set of the register, stack but it shares the code, data, and file of the process to which it belongs.
A process can have multiple threads simultaneously, and the CPU switches among these threads so frequently making an impression on the user that all threads are running simultaneously and this is called multithreading. Multithreading increases the responsiveness of system as, if one thread of the application is not responding, the other would respond in that sense the user would not have to sit idle. Table of Contents. Save Article.
Improve Article. Like Article. Prerequisite — Multiprogramming, multitasking, multithreading and multiprocessing Multitasking: Multitasking is when a CPU is provided to execute multiple tasks at a time. Multitasking involves often CPU switching between the tasks, so that users can collaborate with each program together. Unlike multithreading, In multitasking, the processes share separate memory and resources.
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