Introduction To Cpu Scheduling Algorithms

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Introduction To Cpu Scheduling Algorithms

Author : Himanshi Saxena
ISBN : 365916271X
Genre :
File Size : 86.63 MB
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Extending the concept of Round Robin algorithm (RR) to incorporate user or system defined priority and consider the case of different arrival times of process and suggesting a novel approach that minimizes context switching overhead, average waiting time and turnaround time. Approach: We calculate Optimum Priority 'OP' for each process which determines the order of execution of processes, Optimum Service Time 'OST' for each process which determines time of execution of process in a single round and execute the processes in RR fashion using the calculated parameters. Results: Based on experiments and calculations, the proposed algorithm is successful in reducing afore mentioned problems. Conclusion: Our proposed algorithm can be effective in priority based systems where burst time and arrival time can be easily predicted.
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Advances In Computer And Information Sciences And Engineering

Author : Tarek Sobh
ISBN : 1402087411
Genre : Computers
File Size : 47.62 MB
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Advances in Computer and Information Sciences and Engineering includes a set of rigorously reviewed world-class manuscripts addressing and detailing state-of-the-art research projects in the areas of Computer Science, Software Engineering, Computer Engineering, and Systems Engineering and Sciences. Advances in Computer and Information Sciences and Engineering includes selected papers from the conference proceedings of the International Conference on Systems, Computing Sciences and Software Engineering (SCSS 2007) which was part of the International Joint Conferences on Computer, Information and Systems Sciences and Engineering (CISSE 2007).
Category: Computers

Introduction To Operating System Design And Implementation

Author : Michael Kifer
ISBN : 9781846288432
Genre : Computers
File Size : 69.30 MB
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This book is an introduction to the design and implementation of operating systems using OSP 2, the next generation of the highly popular OSP courseware for undergraduate operating system courses. Coverage details process and thread management; memory, resource and I/0 device management; and interprocess communication. The book allows students to practice these skills in a realistic operating systems programming environment. An Instructors Manual details how to use the OSP Project Generator and sample assignments. Even in one semester, students can learn a host of issues in operating system design.
Category: Computers

System Analysis And Modeling About Models

Author : Frank Alexander Kraemer
ISBN : 9783642216527
Genre : Computers
File Size : 41.35 MB
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This book constitutes the throughly refereed post-proceedings of the 6th International Workshop on Systems Analysis and Modeling, SAM 2010, held in collocation with MODELS 2010 in Oslo, Norway in October 2010. The 15 revised full papers presented went through two rounds of reviewing and improvement. The papers are organized in topical sections on modularity, composition, choreography, application of SDL and UML; SDL language profiles; code generation and model transformations; verification and analysis; and user requirements notification.
Category: Computers

Information Processing And Management

Author : Vinu V Das
ISBN : 9783642122132
Genre : Computers
File Size : 33.73 MB
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It is my pleasure to write the preface for Information Processing and Management. This book aims to bring together innovative results and new research trends in inf- mation processing, computer science and management engineering. If an information processing system is able to perform useful actions for an obj- tive in a given domain, it is because the system knows something about that domain. The more knowledge it has, the more useful it can be to its users. Without that kno- edge, the system itself is useless. In the information systems field, there is conceptual modeling for the activity that elicits and describes the general knowledge a particular information system needs to know. The main objective of conceptual modeling is to obtain that description, which is called a conceptual schema. Conceptual schemas are written in languages called conceptual modeling languages. Conceptual modeling is an important part of requi- ments engineering, the first and most important phase in the development of an inf- mation system.
Category: Computers

Proceedings Of The 3rd International Conference On Frontiers Of Intelligent Computing Theory And Applications Ficta 2014

Author : Suresh Chandra Satapathy
ISBN : 9783319119335
Genre : Computers
File Size : 25.52 MB
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This volume contains 95 papers presented at FICTA 2014: Third International Conference on Frontiers in Intelligent Computing: Theory and Applications. The conference was held during 14-15, November, 2014 at Bhubaneswar, Odisha, India. This volume contains papers mainly focused on Data Warehousing and Mining, Machine Learning, Mobile and Ubiquitous Computing, AI, E-commerce & Distributed Computing and Soft Computing, Evolutionary Computing, Bio-inspired Computing and its Applications.
Category: Computers

Program Scheduling And Simulation In An Operating System Environment

Author : bernard lampard
ISBN : 9783656587422
Genre : Computers
File Size : 38.95 MB
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Research Paper (postgraduate) from the year 2011 in the subject Computer Science - Commercial Information Technology, grade: A, Massachusetts Institute of Technology, language: English, abstract: CPU scheduling is a technique used by computer operating systems to manage the usage of the computer’s central processing unit. In a multi-programming environment whereby several processes are running on the same processor, it is essential to use scheduling criteria to avoid collisions in the computer’s operations. This will help users in a given information technology oriented firm to share server spaces and resources like printers and file storage spaces. In the multi-tasking environment, a program called CPU scheduler selects one of the ready processes and allocates the processor to it. There are a number of occasions when a new process can or must be chosen to run: When a running process block and changes its state to ‘Blocked’, When a timer for a running process expires, When a waiting process unblocks and changes its state to ‘Ready’, and When a running process terminates and changes its state to ‘Exit’ (Wikipedia, 2013). Different types of scheduling programs referred to as algorithms can be employed in CPU scheduling instances. Among the most popular scheduling algorithms is Shortest Job First (SJF). SJF gives the processor to the process with the shortest next time allocation known as the burst. If there are processes with similar CPU bursts in the event queue, the scheduler uses First Come First Served algorithm which allocates the first process to arrive in the queue to the processor regardless of its burst time. It operates under the assumption that the length of the next CPU burst of each of the processes in ready queue is known (CPU scheduling, 2013). The SJF algorithm can be used in both pre-emptive and non-preemptive methods. The algorithm can be preemptive or not. Shortest Job First with preemption uses priority measure to determine the next process to be given the CPU. The processes will be having different CPU bursts and different priority levels allocated to them. The process with the least priority magnitude is always picked next. A process already allocated the processor can be preempted the CPU and allocation done to another process with higher priority when such a process arrives in the queue. SJF with non-preemptive operates in the normal procedure whereby the job with the least CPU burst in the waiting queue is always picked next for allocation of the CPU and the rest of the processes have to wait no matter their urgency. Based on the introduction above, it is essential to use the right CPU scheduling strategy to help us achieve
Category: Computers

Network And Operating Systems Support For Digital Audio And Video

Author : Thomas D.C. Little
ISBN : 3540606475
Genre : Computers
File Size : 33.24 MB
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The prevailing orthodoxy according to which all macroeconomic theory should be reducible to microeconomics is criticized. Such a dogma excludes from economics the creation of new knowledge, which - as distinguished from the mere transmission of knowledge in education and training - is a social process not reducible to microeconomics. A mathematical extension of the Lucas theory to allow for the effects of creation of knowledge upon economic development is shown to improve essentially the prediction of business cycle data, when compared with the conventional real business cycle models of Kydland and Prescott, Hansen and Rogerson, and Danthine and Donaldson.
Category: Computers

Operating System 101

Author : WAGmob
ISBN :
Genre : Computer programming
File Size : 46.85 MB
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***** WAGmob: Over One million Paying Customers ***** WAGmob brings you, Simple 'n Easy, on-the-go learning ebook for "Operating System 101". The ebook provides: Snack sized chapters for easy learning. Designed for both students and adults. This ebook provides a quick summary of essential concepts in Operating System 101 by following snack sized chapters: Operating System Overview: • What is an Operating System? • Operating System Services • Evolution of Operating System Process in Operating System: • Process Introduction • Process state • Process Control Block • Context Switch • Operations on Processes • Scheduling Queues Scheduling in Operating System: • What is Scheduling? • Schedulers • Criteria for CPU Scheduling Algorithm • Non-Preemptive Vs. Preemptive Scheduling • Types of Scheduling Algorithms Scheduling Algorithm I: • First Come First Serve • Shortest Job First • Shortest Remaining Time First • What is Priority? • Non-preemptive Priority Scheduling • Preemptive Priority Scheduling Scheduling Algorithm II: • Round Robin Scheduling • Multiprocessor Scheduling • Time Sharing Multiprocessor Scheduling • Space Sharing Scheduling • Gang Scheduling Threads in Operating System: • What is a Thread? • User level Thread • Kernel level threads • Differences and Similarities between Threads and Processes • Inter-process communication • Message-Passing System Process Synchronization I: • Process Synchronization • How process synchronization is achieved? • Critical Section Problem • Solution to Critical Section Problem • Two Process Solutions • Semaphore • Binary Semaphore • Classic Problems of Synchronization Process Synchronization II: • Bounded Buffer Producer-consumer Problem • The Readers- Writers Problem • The Dining-Philosophers Problem Deadlock in Operating System I: • Deadlock • Necessary Conditions • Resource-Allocation Graph • Methods for Handling Deadlocks • Deadlock Avoidance • Banker's Algorithm Deadlock in Operating System II: • Example of Bankers Algorithm • Deadlock Detection • Detection Algorithm • Example of Detection Algorithm • Recovery from Deadlock Memory Management I: • Memory Management • Physical and Logical address • Overlays • Swapping • Contiguous Memory Allocation • Memory Allocation Method Memory Management II: • Sample Problem on Memory Allocation • Paging • Segmentation • Comparison between Paging and Segmentation Virtual Memory and Page Replacement: • Virtual Memory • Demand Paging • Page Fault • Page Replacement Technique • FIFO • Optimal Page Replacement Algorithm • LRU Page Replacement • Thrashing File System: • File concept • File Attributes • File Operations • Common File Types • File Access Methods • File Allocation Methods Disk Scheduling: • Disk Scheduling • First Come-First Serve (FCFS) • Shortest Seek Time First (SSTF) • SCAN • C-SCAN • LOOK About WAGmob ebooks: 1) A companion ebook for on-the-go, bite-sized learning. 2) Offers value for money (a lifetime of free updates). 3) Over One million paying customers from 175+ countries. WAGmob Vision : Simple 'n easy ebooks for a lifetime of on-the-go learning Visit us : www.wagmob.com Please write to us at [email protected] We would love to improve this ebook.
Category: Computer programming

Computer Science Handbook

Author : Allen B. Tucker
ISBN : 9780203494455
Genre : Computers
File Size : 45.13 MB
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When you think about how far and fast computer science has progressed in recent years, it's not hard to conclude that a seven-year old handbook may fall a little short of the kind of reference today's computer scientists, software engineers, and IT professionals need. With a broadened scope, more emphasis on applied computing, and more than 70 chap
Category: Computers

Systems Programming

Author : I.A.Dhotre A.A.Puntambekar
ISBN : 8184313926
Genre :
File Size : 89.67 MB
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IntroductionComponents of system software, Language processing activities, Fundamentals of language processing, Development tools.AssemblersStructure of an assembler, Design of two pass assembler, Single pass assembler, Cross assembler.Macro ProcessorsMacro definition and call, Macro expansion, Nested macro calls, Advanced macro facilities, Design of a macro-processor, Case study of MASM.Linkers and LoadersLoader schemes: Compile and go, General loader scheme, Absolute loaders, subroutine linkages, relocating loaders, direct linking loader, dynamic linking loader, overlay structure, Design of an absolute loader, Case study of MS-DOS linker and debug.Dynamic LinkingDynamic link libraries-their need, Conventional dynamic linking libraries, The class library, Dynamic linking, DLL s, Use of call back functions, Dynamic linking with and without import.Compilers and InterpretersOverview of compilation process, Concepts of pass, Phases, front-end and back-end, Concepts of bootstrap compiler, cross compiler, incremental compiler and compiler- compiler (Only definitions), Interpreters, comparison of compilers and interpreters.Lexical Analysis and ParsingWhy and what is lexical analysis, design issues, Introduction to parsing, concept of top-down recursive-descendent parsers.Operating SystemsEvolution of OS, Functions of an OS, Batch processing systems, Multi-programming systems, Time sharing systems, Multitasking systems, Real time operating systems, OS structure, System calls, Process, Process control and Process Scheduling (Job Scheduling, Scheduling criteria, Scheduling algorithms).Memory ManagementContiguous and non-contiguous, Swapping, Paging, Segmentation and demand Paging, Virtual Memory, management of virtual memory: Allocation, fetch and replacement.I/O ManagementI/O programming, I/O organization, I/O scheduling algorithms, I/O buffering.File ManagementConcept, Access methods, Directory structure, Protection, File System implementation, Directory implementation, Allocation methods, Free Space management, efficiency and performance.
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Automated Scheduling And Planning

Author : A. Sima Uyar
ISBN : 9783642393044
Genre : Computers
File Size : 51.96 MB
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Solving scheduling problems has long presented a challenge for computer scientists and operations researchers. The field continues to expand as researchers and practitioners examine ever more challenging problems and develop automated methods capable of solving them. This book provides 11 case studies in automated scheduling, submitted by leading researchers from across the world. Each case study examines a challenging real-world problem by analysing the problem in detail before investigating how the problem may be solved using state of the art techniques.The areas covered include aircraft scheduling, microprocessor instruction scheduling, sports fixture scheduling, exam scheduling, personnel scheduling and production scheduling. Problem solving methodologies covered include exact as well as (meta)heuristic approaches, such as local search techniques, linear programming, genetic algorithms and ant colony optimisation.The field of automated scheduling has the potential to impact many aspects of our lives and work; this book highlights contributions to the field by world class researchers.
Category: Computers

Advances In Computer Science And Its Applications

Author : Hwa Young Jeong
ISBN : 9783642416743
Genre : Mathematics
File Size : 78.24 MB
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These proceedings focus on various aspects of computer science and its applications, thus providing an opportunity for academic and industry professionals to discuss the latest issues and progress in this and related areas. The book includes theory and applications alike.
Category: Mathematics

Advanced Microprocessors

Author : D.A.Godse A.P.Godse
ISBN : 8184313624
Genre :
File Size : 68.91 MB
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16, 32 and 64 bit microprocessors, Comparison of features, Generic methods to improve speed of execution, Microprocessor evolution - INTEL 8086 to Pentium with focus on - Clock speed, Concurrent operation of EU and BIU, Segmentation, Instruction set of 8086 and programming examples.Memory management unit - Paging, Virtual memory, Real, Protected and Virtual-86 mode of operation, Protection, Privilege levels, Multitasking, Exception handling in all above modes of operation, Pipelining, Pipelining hazards, Super-scalar architecture, Branch prediction.DMA Controller and Programmable Interrupt Controller, PC hardware - Motherboard circuits, VGA Display adapter, Hard disk data organization, CD ROM interface, MOUSE, Keyboard interface.Evolution of buses - ISA, EISA, PCI, VME, VXI, PCMCIA,Ports - Serial, Parallel, USB for Audio devices.Operating system basics including file management, Process management, Memory management, Shell and shell programming, Command processing for following OS-DOS, LINUX, Windows, Resident programmes, Device driver structure.RISC and CISC processors and comparison of their features, Application areas, Introduction of ARM processors - ARM Core, Versions and Variants, Programming model, Instruction set.
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Theory And Applications Of Models Of Computation

Author : Jin-Yi Cai
ISBN : 9783540725039
Genre : Computers
File Size : 44.80 MB
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This book constitutes the refereed proceedings of the 4th International Conference on Theory and Applications of Models of Computation, TAMC 2007, held in Shanghai, China in May 2007. The 67 revised full papers presented together with 2 plenary lectures were carefully reviewed and selected from over 500 submissions. All major areas in computer science, mathematics (especially logic) and the physical sciences particularly with regard to computation and computability theory are addressed. The papers particularly focus on algorithms, complexity and computability theory, giving the conference a special flavor and distinction.
Category: Computers

Optimized Cloud Resource Management And Scheduling

Author : Wenhong Dr. Tian
ISBN : 9780128016459
Genre : Computers
File Size : 26.6 MB
Format : PDF
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Optimized Cloud Resource Management and Scheduling identifies research directions and technologies that will facilitate efficient management and scheduling of computing resources in cloud data centers supporting scientific, industrial, business, and consumer applications. It serves as a valuable reference for systems architects, practitioners, developers, researchers and graduate level students. Explains how to optimally model and schedule computing resources in cloud computing Provides in depth quality analysis of different load-balance and energy-efficient scheduling algorithms for cloud data centers and Hadoop clusters Introduces real-world applications, including business, scientific and related case studies Discusses different cloud platforms with real test-bed and simulation tools
Category: Computers