Lecture 5
... Many commands are given to the operating system by control statements which deal with: process creation and management I/O handling secondary-storage management main-memory management file-system access protection networking Operating System Concepts ...
... Many commands are given to the operating system by control statements which deal with: process creation and management I/O handling secondary-storage management main-memory management file-system access protection networking Operating System Concepts ...
Slide 1
... that are important to understand. Which of the following statements is correct? A. iOS is built on the Windows kernel, so it is ideal for smartphones because it has good resistance to malware. B. If you don’t like the user interface for Windows but want to run the vast variety of Windows softwar ...
... that are important to understand. Which of the following statements is correct? A. iOS is built on the Windows kernel, so it is ideal for smartphones because it has good resistance to malware. B. If you don’t like the user interface for Windows but want to run the vast variety of Windows softwar ...
Introduction to Programming Methodology Notes
... place, a bank account, a table of data or any item that the program has to handle. They may also represent user-defined data such as vectors, time and lists. Programming problem is analyzed in terms of objects and the nature of communication between them. Program objects should be chosen such that t ...
... place, a bank account, a table of data or any item that the program has to handle. They may also represent user-defined data such as vectors, time and lists. Programming problem is analyzed in terms of objects and the nature of communication between them. Program objects should be chosen such that t ...
Lec1 Intro
... modify and distribute Linux OS (as long as they distribute source code of Linux Kernel) “Competition among Hackers” allow code to be improved and distributed often Many users can spot bugs in the operating system or application if source code is “open” ...
... modify and distribute Linux OS (as long as they distribute source code of Linux Kernel) “Competition among Hackers” allow code to be improved and distributed often Many users can spot bugs in the operating system or application if source code is “open” ...
History of Unix OS
... that more person to directly communicate with the computer. Although the OS can only work on one task at a time, a small piece of time (time slice) is dedicated to each task or user - this is referred to as “time-sharing”. Time sharing gives the illusion that the CPU is giving all the users its full ...
... that more person to directly communicate with the computer. Although the OS can only work on one task at a time, a small piece of time (time slice) is dedicated to each task or user - this is referred to as “time-sharing”. Time sharing gives the illusion that the CPU is giving all the users its full ...
Slide 1
... weaknesses that are important to understand. Which of the following statements is correct? – A. Google Chrome is built on the Windows kernel, so it is ideal for netbooks because it has good resistance to malware. – B. If you don’t like the user interface for Windows but want to run the vast variety ...
... weaknesses that are important to understand. Which of the following statements is correct? – A. Google Chrome is built on the Windows kernel, so it is ideal for netbooks because it has good resistance to malware. – B. If you don’t like the user interface for Windows but want to run the vast variety ...
The Architecture of a Reliable Operating System,
... caused by bugs in such code. However, our system explores an extreme in the design space of UNIX-like operating systems where the entire operating system is run as a collection of independent, tightly restricted, user-mode processes. This structure, combined with several explicit mechanisms for tran ...
... caused by bugs in such code. However, our system explores an extreme in the design space of UNIX-like operating systems where the entire operating system is run as a collection of independent, tightly restricted, user-mode processes. This structure, combined with several explicit mechanisms for tran ...
ARM Based Customizing an Operating System for the Single Board
... (referred to as kernel mode), with access to system data and to the hard-ware; applications run in a non-privileged processor mode (called the user mode), with a limited set of interfaces available and with limited access to system data. The monolithic operating system structure with separate user a ...
... (referred to as kernel mode), with access to system data and to the hard-ware; applications run in a non-privileged processor mode (called the user mode), with a limited set of interfaces available and with limited access to system data. The monolithic operating system structure with separate user a ...
Concurrency: mutual exclusion and synchronization
... A data type that is used to block a process or thread until a particular condition is true. ...
... A data type that is used to block a process or thread until a particular condition is true. ...
4.3 Operations on Processes 4.3.1 Process Creation
... processes to communicate with one another and to synchronize their actions. To illustrate the concept of cooperating processes, let us consider the producerconsumer problem, which is a common paradigm for cooperating processes. A producer process produces information that is consumed by a consumer p ...
... processes to communicate with one another and to synchronize their actions. To illustrate the concept of cooperating processes, let us consider the producerconsumer problem, which is a common paradigm for cooperating processes. A producer process produces information that is consumed by a consumer p ...
... interact with each program while it is running. The CPU is multiplexed among several jobs that are kept in memory and on disk (the CPU is allocated to a job only if the job is in memory). A job is swapped in and out of memory to the disk. On-line communication between the user and the system is prov ...
Low-level formatting or physical formatting
... To use a disk to hold files, the operating system still needs to record its own data structures on the disk. It does so in two steps. (a) The first step is Partition the disk into one or more groups of cylinders. Among the partitions, one partition can hold a copy of the OS‘s executable code, while ...
... To use a disk to hold files, the operating system still needs to record its own data structures on the disk. It does so in two steps. (a) The first step is Partition the disk into one or more groups of cylinders. Among the partitions, one partition can hold a copy of the OS‘s executable code, while ...
on Processes
... address space of the process scheduled to run next the execution state of the new process to run is restored from its kernel stack ...
... address space of the process scheduled to run next the execution state of the new process to run is restored from its kernel stack ...
Process Execution time deadline
... Context-switching time Non-zero context switch time can push limits of a tight schedule. Hard to calculate effects---depends on order of context switches. In practice, OS context switch overhead is small (hundreds of clock cycles) relative to ...
... Context-switching time Non-zero context switch time can push limits of a tight schedule. Hard to calculate effects---depends on order of context switches. In practice, OS context switch overhead is small (hundreds of clock cycles) relative to ...
CS307-slides02
... It treats hardware and the operating system kernel as though they were all hardware. A virtual machine provides an interface identical to the underlying bare ...
... It treats hardware and the operating system kernel as though they were all hardware. A virtual machine provides an interface identical to the underlying bare ...
Processes
... • the running process has used its maximum “time slice” (most OS’s do this) • the running process is preempted by a higher priority process which is in the ready state ..if the OS supports process priorities ...
... • the running process has used its maximum “time slice” (most OS’s do this) • the running process is preempted by a higher priority process which is in the ready state ..if the OS supports process priorities ...
A Deduplication File System & Course Review Kai Li
... Problematic Alternative 3: Staging Data Streams Divide data streams into segments Fingerprint Index ...
... Problematic Alternative 3: Staging Data Streams Divide data streams into segments Fingerprint Index ...
What is an Operating System?
... management must be provided. – A mechanism for concurrent execution, which requires CPU scheduling schemes. – Mechanisms for job synchronization and communication to ensure orderly execution. – A mechanism to avoid deadlock - a job waiting for another job forever. ...
... management must be provided. – A mechanism for concurrent execution, which requires CPU scheduling schemes. – Mechanisms for job synchronization and communication to ensure orderly execution. – A mechanism to avoid deadlock - a job waiting for another job forever. ...
2.01 - Faculty of Computer Science and Information Technology
... research and development. System development is done on the virtual machine, instead of on a physical machine and so does not disrupt normal system operation. The virtual machine concept is difficult to implement due to the effort ...
... research and development. System development is done on the virtual machine, instead of on a physical machine and so does not disrupt normal system operation. The virtual machine concept is difficult to implement due to the effort ...
Concurrency: Mutual Exclusion and Synchronization
... returns to the process. (process has exclusive access to the resource) – If some other process is using the resource, semaphores block the current process by moving it to block queue. When process that currently holds resource release the resource, signal (or release) operation removes the first wai ...
... returns to the process. (process has exclusive access to the resource) – If some other process is using the resource, semaphores block the current process by moving it to block queue. When process that currently holds resource release the resource, signal (or release) operation removes the first wai ...
Chapter 1: Welcome to Linux - Business and Computer Science
... • Computing power was costly – UNIVAC cost $1 million ...
... • Computing power was costly – UNIVAC cost $1 million ...