CS 519 Operating Systems Theory Spring 1998
... transfer between caches and main memory is performed in units called cache blocks/lines caches contain also the value of memory locations which are close to locations which were recently accessed (spatial locality) University of Maryland, CMSC 412, Fall 2002 ...
... transfer between caches and main memory is performed in units called cache blocks/lines caches contain also the value of memory locations which are close to locations which were recently accessed (spatial locality) University of Maryland, CMSC 412, Fall 2002 ...
Chapter 6: Operating Systems: The Genie in the Computer
... Program and data are taken from disk and placed in RAM. Cache controller loads instructions and data into cache. CPU takes program instructions from cache RAM. (fast!) Data needed by the program is also taken from RAM. (fast!) CPU performs the instructions of the program. The results of the computat ...
... Program and data are taken from disk and placed in RAM. Cache controller loads instructions and data into cache. CPU takes program instructions from cache RAM. (fast!) Data needed by the program is also taken from RAM. (fast!) CPU performs the instructions of the program. The results of the computat ...
Introduction to Operating Systems (continued)
... Definition – Virtual Memory • The illusion that each process has its own memory – Separate from virtual memories of other processes – (Often) more memory than machine has installed ...
... Definition – Virtual Memory • The illusion that each process has its own memory – Separate from virtual memories of other processes – (Often) more memory than machine has installed ...
OPERATING SYSTEMS 2015-16 1 OPERATING SYSTEM
... Evolution of OS – Simple Batch, Multi programmed, time shared, Personal computer, Parallel, distributed systems, Real-Time Systems, special purpose systems, operating systems services, user OS interface, systems calls ,Types of systems calls , system Programs, operating system Design and Implementat ...
... Evolution of OS – Simple Batch, Multi programmed, time shared, Personal computer, Parallel, distributed systems, Real-Time Systems, special purpose systems, operating systems services, user OS interface, systems calls ,Types of systems calls , system Programs, operating system Design and Implementat ...
CTE214 Operating Systems Syllabus
... paging, etc.) to develop successful software systems. • Students should understand and discriminate the strengths and weaknesses of scheduling policies, interprocess communication methods and memory management issues in timesharing systems. • Students can understand and analyze process deadlocks in ...
... paging, etc.) to develop successful software systems. • Students should understand and discriminate the strengths and weaknesses of scheduling policies, interprocess communication methods and memory management issues in timesharing systems. • Students can understand and analyze process deadlocks in ...
I/O Management and Disk Scheduling
... • Why buffering is required? – When a user process wants to read blocks of data from a disk, process waits for the transfer – It waits either by • Busy waiting • Process suspension on an interrupt – The problems with this approach • Program waits for slow I/O • Virtual locations should stay in the m ...
... • Why buffering is required? – When a user process wants to read blocks of data from a disk, process waits for the transfer – It waits either by • Busy waiting • Process suspension on an interrupt – The problems with this approach • Program waits for slow I/O • Virtual locations should stay in the m ...
Module 3: Operating
... too small to accommodate all data and programs permanently, the computer system must provide secondary storage to back up main memory. ...
... too small to accommodate all data and programs permanently, the computer system must provide secondary storage to back up main memory. ...
Basic Operating System Concepts
... – to better utilize memory (reduce fragmentation) – to increase the number of processes that could execute concurrently ...
... – to better utilize memory (reduce fragmentation) – to increase the number of processes that could execute concurrently ...
Stallings - Chapter 11
... DMA and CPU share the same system bus DMA unit steals bus cycles (from the CPU) to transfer data (cycle stealing) The CPU instruction cycle is suspended to allow the current data word transfer This is not an interrupt (no context saves) The CPU just pauses for one bus cycle ...
... DMA and CPU share the same system bus DMA unit steals bus cycles (from the CPU) to transfer data (cycle stealing) The CPU instruction cycle is suspended to allow the current data word transfer This is not an interrupt (no context saves) The CPU just pauses for one bus cycle ...
OPERATING SYSTEMS UNIT I Syllabus: Operating Systems
... 1. Explain the various types of computer systems. 2. Explain how protection is provided for the hardware resources by the operating system. 3. What are the system components of an operating system and explain them? 4. What are the various process scheduling concepts? 5. List five services provided b ...
... 1. Explain the various types of computer systems. 2. Explain how protection is provided for the hardware resources by the operating system. 3. What are the system components of an operating system and explain them? 4. What are the various process scheduling concepts? 5. List five services provided b ...
OS Basics
... The kernel's primary function is to manage the computer's resources and allow other programs to run and use these resources. Typically, the resources consist of: The Central Processing Unit. This is the most central part of a computer system, responsible for running or executing programs. The kern ...
... The kernel's primary function is to manage the computer's resources and allow other programs to run and use these resources. Typically, the resources consist of: The Central Processing Unit. This is the most central part of a computer system, responsible for running or executing programs. The kern ...
Computer Organization
... • Understanding assembly key to understanding machinelevel execution model – Behavior of programs in presence of bugs • High-level language model breaks down – Tuning program performance • Understanding sources of program inefficiency – Implementing system software • Compiler has machine code as tar ...
... • Understanding assembly key to understanding machinelevel execution model – Behavior of programs in presence of bugs • High-level language model breaks down – Tuning program performance • Understanding sources of program inefficiency – Implementing system software • Compiler has machine code as tar ...
Najwa Knefati operating system chapter 1
... accomplish its task. These resources are either given to the process when it is created or allocated to it while it is running. A program by itself is not a process. A program is a passive entity, like the contents of a file stored on disk, whereas a process is an active entity. A single-threa ...
... accomplish its task. These resources are either given to the process when it is created or allocated to it while it is running. A program by itself is not a process. A program is a passive entity, like the contents of a file stored on disk, whereas a process is an active entity. A single-threa ...
Slides - Choong
... Used when raising an interrupt Interrupt handler can identify the interrupting device ...
... Used when raising an interrupt Interrupt handler can identify the interrupting device ...
PPT
... Timesharing (multitasking) is logical extension in which CPU switches jobs so frequently that users can interact with each job while it is running, creating interactive computing ...
... Timesharing (multitasking) is logical extension in which CPU switches jobs so frequently that users can interact with each job while it is running, creating interactive computing ...
Computer System Arch..
... Divides Main memory usually into two partitions • Resident Operating System, usually held in low memory with interrupt vector and User processes held in high memory. ...
... Divides Main memory usually into two partitions • Resident Operating System, usually held in low memory with interrupt vector and User processes held in high memory. ...
Peter Sirokman
... optimized for real-time applications to run alongside Linux on L4 Implemented an alternative IPC for applications that used L4 directly (requires modifying the application) ...
... optimized for real-time applications to run alongside Linux on L4 Implemented an alternative IPC for applications that used L4 directly (requires modifying the application) ...
Document
... (e.g., block vs. character devices in Unix) – the OS may provide a system call interface that permits low level interaction between application programs and a device • operating system often buffers data that is moving between devices and application programs’ address spaces – benefits: solve timing ...
... (e.g., block vs. character devices in Unix) – the OS may provide a system call interface that permits low level interaction between application programs and a device • operating system often buffers data that is moving between devices and application programs’ address spaces – benefits: solve timing ...
Monolithic, Mikrokernel and Exokernel
... abstractions than the typical Unix primitives. In addition to the new mechanisms, providing an API compatible with Unix or another conventional operating system was a sine qua non; hence implementing Unix on top of the new systems was a natural consequence. Therefore, the microkernel idea became wid ...
... abstractions than the typical Unix primitives. In addition to the new mechanisms, providing an API compatible with Unix or another conventional operating system was a sine qua non; hence implementing Unix on top of the new systems was a natural consequence. Therefore, the microkernel idea became wid ...
Operating systems
... instructions until it either encounters an input/output operation or the time allocated for that program has expired Then, it saves the address of the memory location where the last instruction was executed and moves to the next program. The same procedure is repeated with the second program After a ...
... instructions until it either encounters an input/output operation or the time allocated for that program has expired Then, it saves the address of the memory location where the last instruction was executed and moves to the next program. The same procedure is repeated with the second program After a ...
Chapter 2: Operating-System Structures • Operating-System
... too small to accommodate all data and programs permanently, the computer system must provide secondary storage to back up main memory. ...
... too small to accommodate all data and programs permanently, the computer system must provide secondary storage to back up main memory. ...
1. Which of the following does not support more than one program at
... 1. Which of the following does not support more than one program at a time? A.DOS B.Linux C.Windows D.Unix 2. Which mode loads minimal set of drivers when starting Windows? A.Safe Mode B.Normal Mode C.VGA Mode D.Network Support Mode 3. The primary purpose of an operating system is a _________ A. To ...
... 1. Which of the following does not support more than one program at a time? A.DOS B.Linux C.Windows D.Unix 2. Which mode loads minimal set of drivers when starting Windows? A.Safe Mode B.Normal Mode C.VGA Mode D.Network Support Mode 3. The primary purpose of an operating system is a _________ A. To ...
1 - OoCities
... A. Test to see the key is _Available_______________ . B. If available, pick the key up and lock out the _other processes _____ . C. Do this all in a single ___machine cycle____________________________ . ...
... A. Test to see the key is _Available_______________ . B. If available, pick the key up and lock out the _other processes _____ . C. Do this all in a single ___machine cycle____________________________ . ...