Lab - 5th Semester Notes
... the OS and all other files. This is the main machine on which all processing is done. All other machines connected to this main machine are known as nodes or clients. They are merely a screen and keyboard connection. All commands or programs specified at these nodes are actually run on the server. P ...
... the OS and all other files. This is the main machine on which all processing is done. All other machines connected to this main machine are known as nodes or clients. They are merely a screen and keyboard connection. All commands or programs specified at these nodes are actually run on the server. P ...
Chapter 3 Process Description and Control Operating
... when the processor begins to execute the program code, we refer to this executing entity as a process ...
... when the processor begins to execute the program code, we refer to this executing entity as a process ...
Workloads: Types, Selection, Characterization
... Times a conditional branch is taken Only represents speed of processor Bottleneck may be in other parts of system ...
... Times a conditional branch is taken Only represents speed of processor Bottleneck may be in other parts of system ...
Threads and Virtualization - The University of Alabama in
... Finite-state machine • The file server is single threaded but doesn’t block for I/O operations • Instead, save state of current request, switch to a new task – client request or disk reply. • Outline of operation: – Get request, process until blocking I/O is needed – Record state of current request ...
... Finite-state machine • The file server is single threaded but doesn’t block for I/O operations • Instead, save state of current request, switch to a new task – client request or disk reply. • Outline of operation: – Get request, process until blocking I/O is needed – Record state of current request ...
Chorus and other Microkernels
... • All else is a service which can be plugged in as an external module at run-time. ...
... • All else is a service which can be plugged in as an external module at run-time. ...
module_23
... State of system? – Can reclaim resources held by process P0, but insufficient resources to fulfill other processes; requests. – Deadlock exists, consisting of processes P1, P2, P3, and P4. ...
... State of system? – Can reclaim resources held by process P0, but insufficient resources to fulfill other processes; requests. – Deadlock exists, consisting of processes P1, P2, P3, and P4. ...
Module 4: Processes
... memory, ready and waiting to execute. Device queues – set of processes waiting for an I/O ...
... memory, ready and waiting to execute. Device queues – set of processes waiting for an I/O ...
The concept of operating system
... Multiprogramming organizes jobs (code and data) so CPU always has one to execute A subset of total jobs in system is kept in memory One job selected and run via job scheduling When it has to wait (for I/O, for example), OS switches to another job ...
... Multiprogramming organizes jobs (code and data) so CPU always has one to execute A subset of total jobs in system is kept in memory One job selected and run via job scheduling When it has to wait (for I/O, for example), OS switches to another job ...
Chapter 1 and 2 Computer System and Operating System Overview
... whether they are waiting for I/O • After an interrupt handler completes, control may not return to the program that was executing at the time of the interrupt ...
... whether they are waiting for I/O • After an interrupt handler completes, control may not return to the program that was executing at the time of the interrupt ...
Department of CSE
... 11. What are the different services provided by an operating system? UNIT-II 12. What are the five activities of an OS with regards to file management? 13. What is the main advantage for an OS designer of using virtual machine architecture? 14. Describe the action taken by a kernel to context switch ...
... 11. What are the different services provided by an operating system? UNIT-II 12. What are the five activities of an OS with regards to file management? 13. What is the main advantage for an OS designer of using virtual machine architecture? 14. Describe the action taken by a kernel to context switch ...
Processes
... process requests an I/O operation time slice of a process is over interrupt or trap OS intervention ...
... process requests an I/O operation time slice of a process is over interrupt or trap OS intervention ...
Desktop Scheduling: How Can We Know What the
... what happens when a Xine movie-player displays a short clip along with an increasing number of CPU-bound processes (which we call stressors) executing in the background. When no such processes are present, Xine gets all the resources it needs (which is about 40% of the CPU). Adding one stressor proc ...
... what happens when a Xine movie-player displays a short clip along with an increasing number of CPU-bound processes (which we call stressors) executing in the background. When no such processes are present, Xine gets all the resources it needs (which is about 40% of the CPU). Adding one stressor proc ...
Desktop scheduling: how can we know what the user wants?
... what happens when a Xine movie-player displays a short clip along with an increasing number of CPU-bound processes (which we call stressors) executing in the background. When no such processes are present, Xine gets all the resources it needs (which is about 40% of the CPU). Adding one stressor proc ...
... what happens when a Xine movie-player displays a short clip along with an increasing number of CPU-bound processes (which we call stressors) executing in the background. When no such processes are present, Xine gets all the resources it needs (which is about 40% of the CPU). Adding one stressor proc ...
Chorusamoeba
... After more than eight years of development and use, the researchers assessed Amoeba. [Tanenbaum 1990, 1991]. Amoeba has demonstrated that it is possible to build a efficient, high performance distributed operating system. Among the things done right were: 1. The microkernel architecture allows the s ...
... After more than eight years of development and use, the researchers assessed Amoeba. [Tanenbaum 1990, 1991]. Amoeba has demonstrated that it is possible to build a efficient, high performance distributed operating system. Among the things done right were: 1. The microkernel architecture allows the s ...
Architectural Support for Protection Rings
... Computer instructions are usually divided into two classes: user instructions and privileged instructions. User instructions are those that are not privileged. Instructions can be labeled as privileged for a number of reasons. Confusion ...
... Computer instructions are usually divided into two classes: user instructions and privileged instructions. User instructions are those that are not privileged. Instructions can be labeled as privileged for a number of reasons. Confusion ...
Lecture 2
... Pipes, Processes, and I/O Redirection Recall that a process is a program in execution. In UNIX a process has access to the following files: 1. Standard Input (stdin) - The keyboard by default, but could be a file or the output of another process (pipe) 2. Standard Output (stdout) --- Where normally ...
... Pipes, Processes, and I/O Redirection Recall that a process is a program in execution. In UNIX a process has access to the following files: 1. Standard Input (stdin) - The keyboard by default, but could be a file or the output of another process (pipe) 2. Standard Output (stdout) --- Where normally ...
slides
... In order to familiarize you with libraries implementation techniques and others, we next study carefully an example ...
... In order to familiarize you with libraries implementation techniques and others, we next study carefully an example ...
an outline of a course on operating system principles
... relations hold between the data before and after each operation. So sequential processes closely mirror our thinking habits, but a computer system is utilized better when its various parts operate concurrently. As a compromise, we try to partition our problems into a moderate number of sequential ac ...
... relations hold between the data before and after each operation. So sequential processes closely mirror our thinking habits, but a computer system is utilized better when its various parts operate concurrently. As a compromise, we try to partition our problems into a moderate number of sequential ac ...
OPERATING SYSTEMS:
... The processor of the 1620 was listed at $64K, with another $40Kfor 20,000 digits of core storage and $10K for the for paper tape. Total cost of $114K or about $1M in today’s dollars. Programming required loading pass 1 of the Fortran II compiler, then the source ...
... The processor of the 1620 was listed at $64K, with another $40Kfor 20,000 digits of core storage and $10K for the for paper tape. Total cost of $114K or about $1M in today’s dollars. Programming required loading pass 1 of the Fortran II compiler, then the source ...
Operating Systems
... 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 controller. Device controller informs CPU that it has finished its operation by ...
... 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 controller. Device controller informs CPU that it has finished its operation by ...
Slides - Department of Computer Science
... The process scheduler decides which process can run, i.e., which process can have the CPU. ...
... The process scheduler decides which process can run, i.e., which process can have the CPU. ...
Operating System
... Data registers can be assigned to a variety of functions by the programmer. In some cases, they are general purpose in nature and can be used with any machine instruction that performs operations on data. Address registers contain main memory addresses of data and instructions, or they contain a por ...
... Data registers can be assigned to a variety of functions by the programmer. In some cases, they are general purpose in nature and can be used with any machine instruction that performs operations on data. Address registers contain main memory addresses of data and instructions, or they contain a por ...