Noncontiguous memory allocation techniques in OS

-
The Non-contiguous memory allocation allows a process to acquire the several memory blocks at the different location in the memory according to its requirement. 

The noncontiguous memory allocation also reduces the memory wastage caused due to internal and external fragmentation.

 As it utilizes the memory holes, created during internal and external fragmentation.
noncontigous-memory-allocation
The noncontiguous memory allocation has an advantage of reducing memory wastage but, but it increases the overheads of address translation. 
As the parts of the process are placed in a different location in memory, it slows the execution of the memory because time is consumed in address translation.
Here, the operating system needs to maintain the table for each process which contains the base address of the each block which is acquired by the process in memory space.
There are some ways used to in noncontiguous memory allocation techniques:-
1.paging
2.segmentation

Conclusion:-
Contiguous memory allocation does not create any overheads and fastens the execution speed of the process but increases memory wastage. In turn noncontiguous memory allocation creates overheads of address translation, reduces execution speed of a process but, increases memory utilization. So there are pros and cons of both allocation methods.

Thank you viewers..
This is published by soumy Sinha...

Comments

Post a Comment

Popular posts from this blog

Introduction of Digital computer

-
Image
INTRODUCTION Digital computer concept:- 1. Digital computers are designed to store, process and communicate information in digital form. 2. Digital computer is any of a class of digital devices capable of solving problems by processing information in discrete form. 3. It is used for processing data represented by discrete, localized physica signals, as the presence or electic current. 4.The main three components of digital computer:- >input:- The user gives a set of input data through input devices. >Processing :- The input data is processed with the help of CPU by well defined and finite sequence of step. >Output : - Some data available from the processing step are output to the user. TYPE OF DIGITAL COMPUTER :- 1.Microcomputer/Desktop computer 2.Minicomputer 3.Mainframe computer 4.Supercomputers Microcomputer :- 1.Microcomputer is also called a personal computer or desktop computer. 2.It includes a microprocessor, memory,...
Read more

INTRODUCTION OF DBMS

-
What is Database :- The database is a collection of inter-related data which is used to retrieve, insert and delete the data efficiently. It is also used to organize the data in the form of a table, schema, views, and reports, etc. For example: The college Database organizes the data about the admin, staff, students and faculty etc. Using the database, you can easily retrieve, insert, and delete the information. DBMS (Database Management System):- Database management system is a software which is used to manage the database. For example: MySQL, Oracle, etc are a very popular commercial database which is used in different applications.DBMS provides an interface to perform various operations like database creation, storing data in it, updating data, creating a table in the database and a lot more.It provides protection and security to the database. In the case of multiple users, it also maintains data consistency. DBMS allows users the following tasks:- Data Definitio...
Read more

Introduction to cache memory

-
Image
Cache Memory in Computer Organization Cache Memory  is a special very high-speed memory. It is used to speed up and synchronizing with high-speed CPU. Cache memory is costlier than main memory or disk memory but economical than CPU registers. Cache memory is an extremely fast memory type that acts as a buffer between RAM and the CPU. It holds frequently requested data and instructions so that they are immediately available to the CPU when needed. Cache memory is used to reduce the average time to access data from the Main memory. The cache is a smaller and faster memory which stores copies of the data from frequently used main memory locations. There are various different independent caches in a CPU, which stored instruction and data. Levels of memory: Level 1 or Register – It is a type of memory in which data is stored and accepted that are immediately stored in CPU. Most commonly used register is accumulator, Program counter, address register etc. Level 2 or...
Read more