kernel‚ whereas the kernel is aware of kernel threads. 2- On systems using either M: 1 or M: N mapping‚ user threads are scheduled by the thread library and the kernel schedules kernel threads. 3- Kernel threads need not be associated with a process whereas every user thread belongs to a process. Kernel threads are generally more expensive to maintain than user threads as they must be represented with a kernel data structure. 4.9) Can a multithreaded solution using multiple user-level threads
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its lifetime. Operating system takes care of selecting the processes from these queues in some fashion. Selecting process is done by the the appropriate scheduler. Types of scheduling: Short - term (or) CPU Scheduler Medium – term Long – term (or) Job Scheduler Short – Term Scheduler: Short term scheduler selects the processes that are ready to execute and allocates CPU to one of them. Medium – Term Scheduler: Medium term scheduler is introduced by some operating systems such as time sharing
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OPERATING SYSTEM - FILE SYSTEM http://www.tutorialspoint.com/operating_system/os_file_system.htm Copyright © tutorialspoint.com File A file is a named collection of related information that is recorded on secondary storage such as magnetic disks‚ magnetic tapes and optical disks.In general‚ a file is a sequence of bits‚ bytes‚ lines or records whose meaning is defined by the files creator and user. File Structure File structure is a structure‚ which is according to a required format
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single-processor system? * Umumnya‚ setiap situasi di mana pemungutan dihindari menggunakan multithreading‚ yang memungkinkan thread untuk memblokir daripada berkutat di beberapa kondisi. 4.4 Which of the following components of program state are shared across threads in a multithreaded process? * Heap memory dan Global variables 4.5 Can a multithreaded solution using multiple user-level threads achieve better performance on a multiprocessor system than on a single-processor system?
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1. Computer System Components (i) Hardware Provides basic computing resources (CPU‚ memory‚ Input/output (I/O) devices). (ii) Operating System (OS) Controls and coordinates the use of the hardware among the various application programs for the various users. (iii) Applications Programs /Application Software Define the ways in which the system resources are used to solve the computing problems of the users (compilers‚ database systems‚ video games‚ business programs). (iv) Users
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COMPARISO BETWEEN DIFFERENT TYPES OF OPERATING SYSTEMS These tables provide a comparison of operating systems‚ listing general and technical information for a number of widely used and currently available PC and handheld (including smartphone and tablet computer) operating systems. The article‚ usage share of operating systems provides a broader‚ and more general‚ comparison of operating systems that includes servers‚ mainframes and supercomputers. Because of the large number and variety of
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Final Project Disease Trends and the Delivery of Health Care Services Ana Vega HCA 240 January 29‚ 2012 Itta Aswad Disease Trends and the Delivery of Health Care Services It is amazing how much the health care delivery services have changed and improved over the years. Today‚ the health care systems have advanced by prolonging life expectancy and quality of life. Though‚ providing health care is not cheap and easy to do. Cost‚ accessibility‚ and quality is a challenge that they face in
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Health care delivery in the Ukraine is compromised by a number of issues. Specifically‚ the healthcare facilities’ infrastructures are substandard‚ equipment is outdated and there is a gross shortage of qualified physicians (Beck‚ Mays‚ Whiteside & Zuniga‚ 2006). Since the collapse of the Soviet Union‚ Ukraine has suffered economically; this has resulted in underfunding for healthcare reforms and reduced accessibility to healthcare‚ particularly for at-risk populations. Unfortunately‚ physicians
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EXAMPLE OF MULTI-USER OPERATING SYSTEM The common examples of multi-user operating system’ include VMS‚ UNIX‚ and mainframe operating systems which include MVS system. A single user multi-tasking operating system is an operating system is capable of allowing multiple software processors to run at the same time. EXAMPLE OF NETWORK OR DISTRIBUTED SYSTEM Short for Network operating system‚ NOS is the software that allows multiple computers to communicate‚ share files and hardware devices with one
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1 INTRODUCTION The hard disk is a magnetic disk used typically to record and store information‚ whenever we save data or install a program on a computer. The information stored in the hard disk does not get deleted when the computer is turned off. Disk partitioning is the process of dividing the hard disk data storage space into separate areas called partitions. Disk partitions will usually take place or get created the first time the hard disk is prepared for usage. After the disk has been
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