Swapping for Memory Management By Operating System

Memory Management. Single Process with page swapping, Paging is a memory management technique in which process address space is broken into blocks of the same size called pages .

What is Swapping ?

Removing suspended or preempted processes from memory and their subsequent bringing back is called swapping. The basic idea of swapping is to treat main memory as a ‘pre-emptable’ resource. Lifting the program from the memory and placing it on the disk is called ‘Swapping out’. To bring the program again from the disk into the main memory is called ‘Swapping in’.

Normally, a blocked process is swapped out so as to create available space for a ready process. This results in improving CPU utilization
Advantages of Swapping

Swapping may also be helpful for improving processor utilization in partitioned memory environments by increasing the ratio of ready to resident processes. Swapping is usually employed in memory-management systems with Contiguous Allocation, such as fixed and variable partitioned memory . Somewhat modified forms of swapping may also be present in virtual memory systems based on Segmentation or on Paging. Swapping brings flexibility even to systems with fixed partitions.

When the scheduler decides to admit a new process for which no suitable free partition can be found, the swapper may be invoked to vacate such a partition.

swapping in operating system

The swapper is an Operating System process whose major responsibilities include:

  •      Selection of processes to swap out: Its criteria is suspended/blocked state, low priority, time spent in memory.
  •      Selection of processes to swap in: Its criteria are time spent on swapping device and priority.
  •      Allocation and management of swap space on a swapping device. Swap space can be system wide or dedicated.
  • Thus the swapper performs most of the functions of the medium-term scheduler. The swapper usually selects a victim among the suspended processes that occupy partitions large enough to satisfy the needs of the incoming process.
Although the mechanics of swapping out following the choice of a victim process is fairly simple in principle, implementation of swapping requires some specific provisions and considerations in Operating System that support it. These generally include the file system, specific Operating System services, and Relocation.



addressing modes types,1,advance-java,2,advancejava,1,aktu entrance exam,1,aktu exam schedule,1,ASP,1,bare machine,1,base register and limit register,1,C Programming,13,C Plus Plus,1,C Programming,6,C Programming MCQ,2,C Programming Questions,2,C programming study material for gate exam,10,Cache Memory,1,CBNST Program,1,Childcare,1,CJ,2,Cloud Computing,1,COA GATE Questions,1,components of use case diagram,1,Computer Architecture,2,Computer architecture based questions for gate exam,11,Computer Network,4,Computer Network Study Material,2,Computer network study material for gate,2,Computer Networks,6,Computer networks GATE Questions,1,Computer Science Study Material for Gate,19,computer science study material for gate exam,32,content based image retrieval content based image retrieval system,1,contiguous memory allocation,2,Core Java,8,COre Java Interview Questions,1,core java interviews questions,1,cyber crime report,1,Cyber crime status,1,cybercrime and security,1,cybercrime examples,1,Data Mining,1,Data Structure,2,Data Structure Questions,1,Data Transmission Architecture,1,Data Transmission in wsn,1,DBMS,5,dbms question paper,1,DE,1,Digital Electronics,1,DS,4,dynamic linking,1,dynamic linking in memory management,1,Dynamic memory allocation in c,1,Electroencephalogram,1,file management in operating system notes,1,FOC,1,Fundamenatl of Computer,1,Gate 2017,5,Gate 2017 Admit card,1,Gate 2017 Exam Schedule,1,Gate 2017 Syllabus,1,gate 2018,1,gate cse study material,1,gate practice set,10,gate study material for computer science,16,Gate study material for computer science 2017,1,GatePreviousYear,1,General,3,HCL Aptitude Test,1,HR Interview Questions,1,HTML,4,Image Processing,1,Important Date of Gate 2017 Exam,1,Information Security Policy,1,internal and external fragmentation,1,JS,1,lagrange's interpolation formula,1,lagrange's interpolation formula examples,1,MComputing,1,memory fragmentation,1,memory management,1,memory management questions and answer in os,1,Motivational,4,NCER,2,Numerical Techniques Lab,1,OOT,1,Operating System,12,Operating System Gate Questions,1,Operating System Objective Questions,4,Operating System Questions Bank,1,Operating system questions for gate,1,Operating System Study material,2,operating system study material for gate exam,16,Operating system tutorial,2,page swapping,1,paged memory allocation,1,paged memory allocation in operating system,1,paging technique of memory management .paging technique,1,paging technique of memory management program in c,1,Pointer in C,4,Process based question for gate,1,Quiz on non conventional energy resources,1,Regression testing,1,relocation in memory management,1,relocation registe,1,relocation register,1,resident monitor,1,resident monitor in operating system,1,routing table,1,segmentation in memory management,1,segmentation in memory management in operating system,1,Servlet,1,session tracking,1,session tracking in java,1,session tracking in servlet,1,Software Engineering,10,Software Engineering baes study material for gate,1,software engineering interview questions,1,Software Quality Assurance,3,software verification methods,1,SPM,1,Stack,1,Structure in C,1,Study Material for gate Computer Science,9,swapping in memory management,1,swapping in operating system,1,TCS Code Vita,1,TCS Interview Questions,1,Technical Interview,1,Technical Questions from DBMS,1,Thrashing in Operating System,1,Threads concept in operating system,1,Tips to Learn Coding,1,Top 30 Core Java Interview Questions with Answer,2,top down approach,1,top down approach in programming,1,Types of operating system,1,UML,1,use case diagram explanation,1,website uses cookies,1,what is cookies website,1,What is process control block ?,1,what is software testing?,1,Wireless Sensor Network,3,worst fit algorithm for memory allocation,1,XML,2,
Computer Science Junction: Swapping for Memory Management By Operating System
Swapping for Memory Management By Operating System
Memory Management. Single Process with page swapping, Paging is a memory management technique in which process address space is broken into blocks of the same size called pages .
Computer Science Junction
Loaded All Posts Not found any posts VIEW ALL Readmore Reply Cancel reply Delete By Home PAGES POSTS View All RECOMMENDED FOR YOU LABEL ARCHIVE SEARCH ALL POSTS Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago Followers Follow THIS PREMIUM CONTENT IS LOCKED STEP 1: Share. STEP 2: Click the link you shared to unlock Copy All Code Select All Code All codes were copied to your clipboard Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy