Slides - Winlab
... Q:What is the correct way to use chopsticks? A:Which ever way works. • Buyer beware, you get what you pay for. • The second best word after free is community. • Well known: Google returns an answer in the first page. ...
... Q:What is the correct way to use chopsticks? A:Which ever way works. • Buyer beware, you get what you pay for. • The second best word after free is community. • Well known: Google returns an answer in the first page. ...
Chapter 11 I/O Management and Disk Scheduling
... • May have good performance if most requests are to clustered file sectors • Approaches random scheduling in performance if there are many processes disk arm movement ...
... • May have good performance if most requests are to clustered file sectors • Approaches random scheduling in performance if there are many processes disk arm movement ...
COS 318: Operating Systems Virtual Memory and Address Translation Andy Bavier
... A process should be able to run regardless of its physical location or the physical memory size Give each process a large, static “fake” address space As a process runs, relocate each load and store to its actual memory ...
... A process should be able to run regardless of its physical location or the physical memory size Give each process a large, static “fake” address space As a process runs, relocate each load and store to its actual memory ...
Synchronization Part-I - McMaster Computing and Software
... This type of lock is known as a spinlock, because the lock just sits there and spins while it waits. ...
... This type of lock is known as a spinlock, because the lock just sits there and spins while it waits. ...
Efficient System-Enforced Deterministic Parallelism Yale University Abstract
... once they manifest, they do not change the inherently race-prone model in which developers write applications. Determinator replaces the standard concurrent access model with a private workspace model, in which data races do not arise in the first place. This model gives each thread a complete, priv ...
... once they manifest, they do not change the inherently race-prone model in which developers write applications. Determinator replaces the standard concurrent access model with a private workspace model, in which data races do not arise in the first place. This model gives each thread a complete, priv ...
UNIX/LINUX
... of technology(TV remote, Thermostat, Cars, Phones, you name it, it probably runs off of it). ...
... of technology(TV remote, Thermostat, Cars, Phones, you name it, it probably runs off of it). ...
Operating System Structures
... CPU scheduler needs to know about memory needs of all active processes, on a large system this information resides in memory that is possibly swapped out... ...
... CPU scheduler needs to know about memory needs of all active processes, on a large system this information resides in memory that is possibly swapped out... ...
Operating System - Chap1: An Introduction to Operating System
... 1.1 INTRODUCTION In the early days of computer use, computers were huge machines, which were expensive to buy, run, and maintain. The user at that time interacted directly with the hardware through machine language. A software was required which could perform basic tasks, such as recognizing input f ...
... 1.1 INTRODUCTION In the early days of computer use, computers were huge machines, which were expensive to buy, run, and maintain. The user at that time interacted directly with the hardware through machine language. A software was required which could perform basic tasks, such as recognizing input f ...
slides - Computer Science
... channels to any subset of a system’s commodity devices needed during a session Enables trusted audit and control of physical devices without stopping and restarting applications, Allows unmodified commodity OSes to have unfettered access to all hardware resources and preserve the entire application e ...
... channels to any subset of a system’s commodity devices needed during a session Enables trusted audit and control of physical devices without stopping and restarting applications, Allows unmodified commodity OSes to have unfettered access to all hardware resources and preserve the entire application e ...
LinuxOS-SGOSbookCh20
... about to be returned to user mode 2. The second technique applies to critical sections that occur in an interrupt service routines – By using the processor’s interrupt control hardware to disable interrupts during a critical section, the kernel guarantees that it can proceed without the risk of conc ...
... about to be returned to user mode 2. The second technique applies to critical sections that occur in an interrupt service routines – By using the processor’s interrupt control hardware to disable interrupts during a critical section, the kernel guarantees that it can proceed without the risk of conc ...
Notes for Lecture 12
... Scheduling High-level scheduling Placed in queue based on level of priority and eventually executed ...
... Scheduling High-level scheduling Placed in queue based on level of priority and eventually executed ...
CHAPTER 1: Computer Systems
... Scheduling High-level scheduling Placed in queue based on level of priority and eventually executed ...
... Scheduling High-level scheduling Placed in queue based on level of priority and eventually executed ...
07 External Memory
... Allows programs to be altered and recompiled independently, without relinking and re-loading Lends itself to sharing among processes Lends itself to protection ...
... Allows programs to be altered and recompiled independently, without relinking and re-loading Lends itself to sharing among processes Lends itself to protection ...
COS 318: Operating Systems Virtual Memory and Its Address Translations Kai Li
... A process should be able to run regardless of its physical location or the physical memory size Give each process a large, static “fake” address space As a process runs, relocate each load and store to its actual memory ...
... A process should be able to run regardless of its physical location or the physical memory size Give each process a large, static “fake” address space As a process runs, relocate each load and store to its actual memory ...
ppt
... Most OS designed keeping in mind general purpose applications Need to fine tune system level procedures and functions to better adjust to the needs of the application Increase application specific system performance ...
... Most OS designed keeping in mind general purpose applications Need to fine tune system level procedures and functions to better adjust to the needs of the application Increase application specific system performance ...
Abstract View of System Components
... (ex: CPU time, memory space, I/O devices…) Control program – controls the execution of user programs and operations of I/O devices . Kernel – the one program running at all times (all else being application programs). Since hardware alone is not particularly easy to use, application programs a ...
... (ex: CPU time, memory space, I/O devices…) Control program – controls the execution of user programs and operations of I/O devices . Kernel – the one program running at all times (all else being application programs). Since hardware alone is not particularly easy to use, application programs a ...
Chapter 13
... signature I make on my own PC, and I've worked in security for over fifteen years. Checking all of the software in the critical path between the display and the signature software is way beyond my patience. ” ...
... signature I make on my own PC, and I've worked in security for over fifteen years. Checking all of the software in the critical path between the display and the signature software is way beyond my patience. ” ...
ch3
... File-system manipulation program capability to read, write, create, and delete files Communications exchange of information between processes executing either on same or different system connected by a network Implemented via shared memory or message passing Error detection ensure corr ...
... File-system manipulation program capability to read, write, create, and delete files Communications exchange of information between processes executing either on same or different system connected by a network Implemented via shared memory or message passing Error detection ensure corr ...
08 Operating System Support
... • Determines which programs are submitted for processing • i.e. controls the degree of multiprogramming • Once submitted, a job becomes a process for the short term scheduler • (or it becomes a swapped out job for the medium term scheduler) ...
... • Determines which programs are submitted for processing • i.e. controls the degree of multiprogramming • Once submitted, a job becomes a process for the short term scheduler • (or it becomes a swapped out job for the medium term scheduler) ...
Linux Pres1 - Parent Directory
... The recommended place to install boot Loader, unless the MBR already starts another operating system loader, such as System Commander or OS/2's Boot Manager. The MBR is a special area on your hard drive that is automatically loaded by your computer's BIOS, and is the earliest point at which Boot Loa ...
... The recommended place to install boot Loader, unless the MBR already starts another operating system loader, such as System Commander or OS/2's Boot Manager. The MBR is a special area on your hard drive that is automatically loaded by your computer's BIOS, and is the earliest point at which Boot Loa ...
Linux+ Guide to Linux Certification
... – Any processes that have used a lot of CPU time will get lower priority than those that have not ...
... – Any processes that have used a lot of CPU time will get lower priority than those that have not ...
Basic Concepts of Real Time Operating Systems
... time, i.e. the arrival time of the first instance usually is called the phase of this (generic) task, denoted by φi. In the case of aperiodic tasks no period is present, i.e. the next arrival time of an instance of an aperiodic task is unknown a priori and may happen at any time. Usually the assumpt ...
... time, i.e. the arrival time of the first instance usually is called the phase of this (generic) task, denoted by φi. In the case of aperiodic tasks no period is present, i.e. the next arrival time of an instance of an aperiodic task is unknown a priori and may happen at any time. Usually the assumpt ...