Homework 1
... has only 2 jobs: A and B. Provide a scenario where running the jobs sequentially will provide better performance (measured by having a smaller makespan) compared to running them in parallel. If such a scenario does not exist, explain why. Otherwise, explain the particulars of jobs A and B and how it ...
... has only 2 jobs: A and B. Provide a scenario where running the jobs sequentially will provide better performance (measured by having a smaller makespan) compared to running them in parallel. If such a scenario does not exist, explain why. Otherwise, explain the particulars of jobs A and B and how it ...
Operating Systems
... memory divided by the page size - Page frame = size of memory/page size • How many bits does the system use to maintain the displacement = as much as page size • Ex: contains 128MB of main memory and has a page size of 8KB ...
... memory divided by the page size - Page frame = size of memory/page size • How many bits does the system use to maintain the displacement = as much as page size • Ex: contains 128MB of main memory and has a page size of 8KB ...
Introduction
... Types of Systems • Time-sharing Systems (multitasking) logical extension of multiprogramming in which CPU switches jobs so frequently that users can interact with each job while it is running, creating interactive computing – Response time should be < 1 second – Each user has at least one program e ...
... Types of Systems • Time-sharing Systems (multitasking) logical extension of multiprogramming in which CPU switches jobs so frequently that users can interact with each job while it is running, creating interactive computing – Response time should be < 1 second – Each user has at least one program e ...
Overview and History
... a thread is a unit of code that can be scheduled by the OS like NT/2000, XP uses a 32-level priority scheme to determine the order of thread execution real-time class contains threads with priorities ranging from 16 to 32 variable class contains threads having priorities from 0 to 15 kernel au ...
... a thread is a unit of code that can be scheduled by the OS like NT/2000, XP uses a 32-level priority scheme to determine the order of thread execution real-time class contains threads with priorities ranging from 16 to 32 variable class contains threads having priorities from 0 to 15 kernel au ...
Memory Management
... Why? Computers got faster but I/O did not speed up at same rate. I/O operations left processor idle. Solution: Run another program while reading in a new program. Must expand memory to support multiple jobs. Features introduced on Monitor-type computer operating systems: Multiprogramming: ...
... Why? Computers got faster but I/O did not speed up at same rate. I/O operations left processor idle. Solution: Run another program while reading in a new program. Must expand memory to support multiple jobs. Features introduced on Monitor-type computer operating systems: Multiprogramming: ...
Lecture Overview Operating System Components
... extended machine with a convenient interface; it is possible to separate these two functions • A virtual machine provides multiprogramming only by providing an exact virtual copies of the bare hardware • The operating system creates the illusion of multiple processes, each executing on its own proce ...
... extended machine with a convenient interface; it is possible to separate these two functions • A virtual machine provides multiprogramming only by providing an exact virtual copies of the bare hardware • The operating system creates the illusion of multiple processes, each executing on its own proce ...
Multiprogrammed Batch Systems
... Time-Sharing Systems–Interactive Computing Time-sharing or multitasking is an extension of multiprogramming; users can interact with program while it is running and many users to share the computer simultaneously. The CPU is multiplexed among several jobs that are kept in memory and on disk (the CPU ...
... Time-Sharing Systems–Interactive Computing Time-sharing or multitasking is an extension of multiprogramming; users can interact with program while it is running and many users to share the computer simultaneously. The CPU is multiplexed among several jobs that are kept in memory and on disk (the CPU ...
DOS (“Disk Operating System”)
... – Home Directories • Your own “private” storage real estate. • Each user account has one (by default) • They might exist for users that don’t‘ – Users can get deleted and still leave their home directory ...
... – Home Directories • Your own “private” storage real estate. • Each user account has one (by default) • They might exist for users that don’t‘ – Users can get deleted and still leave their home directory ...
Cindy - Anatomy of a Window
... folders or directories Memory management deals with temporary storage or use of applications and data The OS controls where applications and data are stored in memory ...
... folders or directories Memory management deals with temporary storage or use of applications and data The OS controls where applications and data are stored in memory ...
Operating Systems
... Multi-tasking is great – how many applications do you usually run at once? About… How do ‘access rights’ control what areas you can use on our school network? ...
... Multi-tasking is great – how many applications do you usually run at once? About… How do ‘access rights’ control what areas you can use on our school network? ...
Operating Systems
... Comes with overhead since CPU service time needs to be determined and processes sorted accordingly CS105 Section 2 - Lecture 6 ...
... Comes with overhead since CPU service time needs to be determined and processes sorted accordingly CS105 Section 2 - Lecture 6 ...
Module 3: Operating
... – The kernel • Consists of everything below the system-call interface and above the physical hardware • Provides the file system, CPU scheduling, memory management, and other operating system functions ...
... – The kernel • Consists of everything below the system-call interface and above the physical hardware • Provides the file system, CPU scheduling, memory management, and other operating system functions ...
The Evolution of Operating Systems
... meal on a 4-burner stove (“parallel”). When you cook on a multiburner stove you are multitasking and assigning time slices to different items being cooked. Stir one pot for a few seconds, then turn your attention to another pot and add some ingredients; then turn to check on a third pot, etc. Each p ...
... meal on a 4-burner stove (“parallel”). When you cook on a multiburner stove you are multitasking and assigning time slices to different items being cooked. Stir one pot for a few seconds, then turn your attention to another pot and add some ingredients; then turn to check on a third pot, etc. Each p ...
Chapter 2: OS Structures
... – Although MS-DOS has some structure, its interfaces and levels of functionality are not well separated ...
... – Although MS-DOS has some structure, its interfaces and levels of functionality are not well separated ...
Introduction to Object Technology
... Processes • A program in execution • An instance of a program running on a computer • The entity that can be assigned to and executed on a processor • A unit of activity characterized by a single sequential thread of execution, a current state, and an associated set of system resources ...
... Processes • A program in execution • An instance of a program running on a computer • The entity that can be assigned to and executed on a processor • A unit of activity characterized by a single sequential thread of execution, a current state, and an associated set of system resources ...
Introduction - Stanford Secure Computer Systems Group
... • Do not look at other people’s solutions to projects - We reserve the right to run MOSS on present and past submissions - Do not publish your own solutions in violation of the honor code • You may read but not copy other OSes - E.g., Linux, OpenBSD/FreeBSD, etc. • Cite any code that inspired your c ...
... • Do not look at other people’s solutions to projects - We reserve the right to run MOSS on present and past submissions - Do not publish your own solutions in violation of the honor code • You may read but not copy other OSes - E.g., Linux, OpenBSD/FreeBSD, etc. • Cite any code that inspired your c ...
Operating System
... Easy to add or remove devices Protect system and data Easy to upgrade Easy to manage user accounts Good & predictable average response ...
... Easy to add or remove devices Protect system and data Easy to upgrade Easy to manage user accounts Good & predictable average response ...
Operating Systems
... Management of I/O Management of memory Scheduling of user processes (start, interrupt, and stop) A secure and reliable environment for programs and users ...
... Management of I/O Management of memory Scheduling of user processes (start, interrupt, and stop) A secure and reliable environment for programs and users ...
The LINUX Operating System
... • an OS initially created by Linus Torvalds (Finland) and a team working over the Internet; • developed from MINIX, a small Unix system; • An open and free operating system, adaptable to meet individuals needs; ...
... • an OS initially created by Linus Torvalds (Finland) and a team working over the Internet; • developed from MINIX, a small Unix system; • An open and free operating system, adaptable to meet individuals needs; ...
BA471 Management Information Systems
... Commands GUI Multi-tasking Time-sharing Scalability: The ability of a system to handle more or less demand, more or fewer users; also a product selling point – able to expand or contract to accommodate growing configuration. ...
... Commands GUI Multi-tasking Time-sharing Scalability: The ability of a system to handle more or less demand, more or fewer users; also a product selling point – able to expand or contract to accommodate growing configuration. ...
System Software
... running many programs at once, including the OS, it is not. Your computer runs a bit of one program before switching to another. And then switching again, often because it is waiting for I/O. Because your computer is very fast, it seems like they are all running at the same time. ...
... running many programs at once, including the OS, it is not. Your computer runs a bit of one program before switching to another. And then switching again, often because it is waiting for I/O. Because your computer is very fast, it seems like they are all running at the same time. ...
