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A multiprocessing system has more than two processors. The CPUs are added to the system that helps to increase the computing speed of the system. Every CPU has its own set of registers and main memory.
However, because each CPU are separate, it may happen that one CPU may not have anything to process. One processor may sit idle, and the other may be overloaded with the specific processes. In such a case, the process and resources are shared dynamically among the processors.
In this tutorial, you will learn:
Multithreading is a program execution technique that allows a single process to have multiple code segments (like threads). It also runs concurrently within the "context" of that process. Multi-threaded applications are applications that have two or more threads that run concurrently. Therefore, it is also known as concurrency.
Here are the essential features of Multiprocessing:
Here are important aspects of multithreading:
Here are important differences between Multiprocessing and multithreading.
Parameter | Multiprocessing | Multithreading |
---|---|---|
Basic | Multiprocessing helps you to increase computing power. | Multithreading helps you to create computing threads of a single process to increase computing power. |
Execution | It allows you to execute multiple processes concurrently. | Multiple threads of a single process are executed concurrently. |
CPU switching | In Multiprocessing, CPU has to switch between multiple programs so that it looks like that multiple programs are running simultaneously. | In multithreading, CPU has to switch between multiple threads to make it appear that all threads are running simultaneously. |
Creation | The creation of a process is slow and resource-specific. | The creation of a thread is economical in time and resource. |
Classification | Multiprocessing can be symmetric or asymmetric. | Multithreading is not classified. |
Memory | Multiprocessing allocates separate memory and resources for each process or program. | Multithreading threads belonging to the same process share the same memory and resources as that of the process. |
Pickling objects | Multithreading avoids pickling. | Multiprocessing relies on pickling objects in memory to send to other processes. |
Program | Multiprocessing system allows executing multiple programs and tasks. | Multithreading system executes multiple threads of the same or different processes. |
Time taken | Less time is taken for job processing. | A moderate amount of time is taken for job processing. |
Here are cons/ pros of Multiprocessing:
Here, are pros/benefits of multithreading:
Here, are cons/drawback by using Multiprocessing operating system
Here, are cons/ drawbacks of using multithreading system :
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