2008 Prentice-Hall, Inc.
... handles these details, and hundreds of other tasks behind the scenes. Originally, operating systems were envisioned as a way to handle one of the most complex input/output operations: communicating with a variety of disk drives. But, the operating system quickly evolved into an all-encompassing brid ...
... handles these details, and hundreds of other tasks behind the scenes. Originally, operating systems were envisioned as a way to handle one of the most complex input/output operations: communicating with a variety of disk drives. But, the operating system quickly evolved into an all-encompassing brid ...
ch2
... directly to main memory without CPU intervention Only one interrupt is generated per block, rather than the one ...
... directly to main memory without CPU intervention Only one interrupt is generated per block, rather than the one ...
Chapter 2: System Structures
... Some ask the system for info - date, time, amount of available memory, disk space, number of users Others provide detailed performance, logging, and debugging information Typically, these programs format and print the output to the terminal or other output devices ...
... Some ask the system for info - date, time, amount of available memory, disk space, number of users Others provide detailed performance, logging, and debugging information Typically, these programs format and print the output to the terminal or other output devices ...
204341 Operating Systems
... Computer-System Operation I/O devices and the CPU can execute concurrently Each device controller is in charge of a particular device type Each device controller has a local buffer CPU moves data from/to main memory to/from local buffers I/O is from the device to local buffer of controlle ...
... Computer-System Operation I/O devices and the CPU can execute concurrently Each device controller is in charge of a particular device type Each device controller has a local buffer CPU moves data from/to main memory to/from local buffers I/O is from the device to local buffer of controlle ...
What is an Operating System?
... At most one I/O request is outstanding at a time, no simultaneous I/O processing After I/O starts, control returns to user program without waiting for I/O completion System call – request to the operating system to allow user to wait for I/O completion Device-status table contains entry for ...
... At most one I/O request is outstanding at a time, no simultaneous I/O processing After I/O starts, control returns to user program without waiting for I/O completion System call – request to the operating system to allow user to wait for I/O completion Device-status table contains entry for ...
Chapter 1 Introducing Operating Systems
... – Need for improved flexibility, reliability, and speed – Virtual machines • Accommodated multiple operating systems that run at the same time and share resources • Required OS to have an intermediate manager – Oversee the access of each operating system to the server’s physical resources ...
... – Need for improved flexibility, reliability, and speed – Virtual machines • Accommodated multiple operating systems that run at the same time and share resources • Required OS to have an intermediate manager – Oversee the access of each operating system to the server’s physical resources ...
Module 4: Processes
... Extensibility (Can easily add new functions--user processes) Flexibility (Can remove functions that are not needed) Portability (Only the small kernel has hardware specific code) Distributed System support (Message passing can generalize to network communications) Object oriented (A good d ...
... Extensibility (Can easily add new functions--user processes) Flexibility (Can remove functions that are not needed) Portability (Only the small kernel has hardware specific code) Distributed System support (Message passing can generalize to network communications) Object oriented (A good d ...
Operating Systems ECE344 - EECG Toronto
... • The project cannot be done in the last few days • Repeat: the project cannot be done in the last few days! ...
... • The project cannot be done in the last few days • Repeat: the project cannot be done in the last few days! ...
Figure 1-3
... • Help ensure memory is used properly and there are no memory conflicts • Manages how programs access the processing capabilities of the CPU – Example: if there is one CPU and ten programs that want to access the CPU, the OS will give each program a time slice on the CPU • Each program does a little ...
... • Help ensure memory is used properly and there are no memory conflicts • Manages how programs access the processing capabilities of the CPU – Example: if there is one CPU and ten programs that want to access the CPU, the OS will give each program a time slice on the CPU • Each program does a little ...
Introduction - Computer Science
... sharing: how are resources shared across users? naming: how are resources named (by users or programs)? security: how is the integrity of the OS and its resources ensured? protection: how is one user/program protected from another? performance: how do we make it all go fast? reliability: what happen ...
... sharing: how are resources shared across users? naming: how are resources named (by users or programs)? security: how is the integrity of the OS and its resources ensured? protection: how is one user/program protected from another? performance: how do we make it all go fast? reliability: what happen ...
ppt
... System goals – operating system should be easy to design, implement, and maintain, as well as flexible, reliable, error-free, and efficient ...
... System goals – operating system should be easy to design, implement, and maintain, as well as flexible, reliable, error-free, and efficient ...
Slides with
... Cooperative– Foreground program controls CPU and relinquishes it when closed. This causes the computer to “freeze” or “hang.” Preemptive– Gives the OS control of the CPU when a program stops running. Multithreading– Enables the computer to perform more than one task in a program. Each task is ...
... Cooperative– Foreground program controls CPU and relinquishes it when closed. This causes the computer to “freeze” or “hang.” Preemptive– Gives the OS control of the CPU when a program stops running. Multithreading– Enables the computer to perform more than one task in a program. Each task is ...
Lecture 1 - Concepts of the UNIX Operating System
... ALLOWS DESIGNING OF APPLICATIONS THAT DETERMINE THEIR OWN BEHAVIOR BY READING CONFIGURATION FILES. ...
... ALLOWS DESIGNING OF APPLICATIONS THAT DETERMINE THEIR OWN BEHAVIOR BY READING CONFIGURATION FILES. ...
ch02_computer_struct
... directly to main memory without CPU intervention Only one interrupt is generated per block, rather than the one ...
... directly to main memory without CPU intervention Only one interrupt is generated per block, rather than the one ...
9781439079201_PPT_ch01
... • The differences among batch, interactive, real-time, hybrid, and embedded operating systems • Multiprocessing and its impact on the evolution of operating system software • Virtualization and core architecture trends in new operating systems ...
... • The differences among batch, interactive, real-time, hybrid, and embedded operating systems • Multiprocessing and its impact on the evolution of operating system software • Virtualization and core architecture trends in new operating systems ...
Amoeba Distributed Operating System
... First prototype was released in 1983 The last official update was in 1996 Others have developed their own versions – Fireball Amoeba by Fireball Software Distribution ...
... First prototype was released in 1983 The last official update was in 1996 Others have developed their own versions – Fireball Amoeba by Fireball Software Distribution ...
History of Unix OS - Seneca
... 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 ...
Questions 1 Question 8.1–1: (Solution, p 3) Name at least two
... parameters to execve. The new process keeps the state of the replaced process, but its memory changes to the memory image required by the program, and execution enters the started program. Execution will not return to the program calling execve unless an error prevents the OS from executing the requ ...
... parameters to execve. The new process keeps the state of the replaced process, but its memory changes to the memory image required by the program, and execution enters the started program. Execution will not return to the program calling execve unless an error prevents the OS from executing the requ ...
Chapter 2: Operating-System Structures
... A virtual machine takes the layered approach to its logical ...
... A virtual machine takes the layered approach to its logical ...
Computer Networks - Home - KSU Faculty Member websites
... memory to support multiple tasks that are all active, or resident, in memory at the same time. Additional disk space is also required on servers to hold shared files and to function as an extension to the internal memory on the system. Because a NOS depends on the continuous operation of its serve ...
... memory to support multiple tasks that are all active, or resident, in memory at the same time. Additional disk space is also required on servers to hold shared files and to function as an extension to the internal memory on the system. Because a NOS depends on the continuous operation of its serve ...