Difference Between Multitasking vs. Multithreading in OS

Main Difference

The difference between multitasking and multithreading in OS is that in multitasking CPU allows the user to perform multiple tasks whereas multithreading is a process that creates multiple threads of the single process that add more power to the computer.

Multitasking vs. Multithreading in OS

In operating system two most important concepts are multitasking and multithreading. In multitasking CPU allows user to perform multiple task whereas multithreading is a process that creates multiple threads of the single process that add more power to the computer. Thread based multitasking is known as multithreading. Multitasking is also known as multiprocessing. Two most important concepts in computer science are multiprocessing and multithreading. Multiprocessing is the process that adds CPU’S to power whereas multithreading is the process that creates multiple threads of the single process that add more power to the computer. The work of multiprocessing and multithreading is to add more power to the computer. The consumption of memory by any processing effect the power of the computer, by using the techniques of multiprocessing and multithreading the efficient use of computer power is made. The system that has more than one processor is known as a multiprocessing system. More than two processors are added to increase the power of computer. CPU has set of registers the process is stored in these registers. For example, if the process of addition of two numbers is made the integers will be saved in registers and the addition of number is also stored in a register. If there will be more than one process, there will be more registers than if one processor will do work and other will be free in this way power of the computer is increased. In multithreading, multiple threads are created. A thread in multithreading is a process means a code segment of a process. A thread has its own thread ID, program counter, registers, and stack. If we create separate processes for each service, then each processor share code, data and system resources. If we do not create threads, the system can get exhausted. Creating threads can make processor easy for working. The responsiveness is increased in multithreading, and this is the best advantage of using multithreading. The big advantage of multithreading is resource sharing and in resource sharing the several threads of a process share same code. When CPU performs several tasks that is a program, process, task and thread it is known as multitasking. Task is being switched frequently so that user can do the all the process at the same time. Many users can share the system at the same time. CPU scheduling and multiprogramming are used in OS for multitasking.

Comparison Chart

MultitaskingMultithreading
In multitasking CPU allows the user to perform multiple tasksMultithreading is a process that creates multiple threads of the single process that add more power to the computer.
Switching
In multitasking switching between tasks happenIn multithreading switching between threads happen
Multiprocessing
Multiprocessing is part of multitaskingMultiprocessing is not a part of multithreading
Memory
In multitasking, process do not share the same memoryIn multithreading process share same memory

What is multitasking?

When CPU performs several tasks that is a program, process, task and thread it is known as multitasking. Task is being switched frequently so that user can do the all the process at the same time. Many users can share the system at the same time. CPU scheduling and multiprogramming are used in OS for multitasking. The system that has more than one processor is known as a multiprocessing system. More than two processors are added to increase the power of the computer. CPU has set of registers the process is stored in these registers. For example, if the process of addition of two numbers is made the integers will be saved in registers and the addition of number is also stored in a register. If there will be more than one process, there will be more registers than if one processor will do work and other will be free in this way power of the computer is increased. There are types of processors such as symmetric multiprocessing and asymmetric multiprocessing. If we talk about symmetric multiprocessing, in symmetric multiprocessing the processor is free to run and can run any process whereas in the case of multithreading there is a master-salve relationship. In multiprocessing, there is an integrated memory controller that job of the integrated memory controller is to add more memory.

What is multithreading?

When CPU performs several tasks that is a program, process, task and thread it is known as multitasking. Task is being switched frequently so that user can do the all the process at the same time. Many users can share the system at the same time. CPU scheduling and multiprogramming are used in OS for multitasking.

In multithreading, multiple threads are created. A thread in multithreading is a process means a code segment of a process. A thread has its own thread ID, program counter, registers, and stack. If we create separate processes for each service, then each processor share code, data and system resources. If we do not create threads, the system can get exhausted. Creating threads can make processor easy for working. The responsiveness is increased in multithreading, and this is the best advantage of using multithreading. The big advantage of multithreading is resource sharing and in resource sharing the several threads of a process share same code.

Key Differences

  1. In multitasking CPU allows user to perform multiple task whereas Multithreading is a process that creates multiple threads of the single process that add more power to the computer.
  2. In multitasking switching between tasks is happen whereas in multithreading switching between threads is happen.
  3. Multiprocessing is part of multitasking whereas Multiprocessing is not a part of multithreading.
  4. In multitasking, process do not share the same memory whereas in multithreading process share the same

Comparison Video

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Harlon Moss

Harlon currently works as a quality moderator and content writer for Turpy Media. He graduated from the University of California in 2010 with a degree in Computer Science. Follow him on Twitter @HarlonMoss or on Pinterest @HarlonMoss

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