Operating Systems
... • 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) ...
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 1
... environment. This is especially important for DBAs that manage multiple databases on multiple servers. Regular maintenance and troubleshooting activities will require your logon directly to the database server. To promote efficiency and sanity, you should develop a standard set of operating system t ...
... environment. This is especially important for DBAs that manage multiple databases on multiple servers. Regular maintenance and troubleshooting activities will require your logon directly to the database server. To promote efficiency and sanity, you should develop a standard set of operating system t ...
The Mach System Abraham Silberschatz, Peter Baer Galvin, Greg
... Passes messages by moving memory pointers to shared memory objects where possible – avoids object copy Uses virtual memory re-mapping to transfer large messages – also known as virtual copy or copy-on-write. Memory management is based on the use of memory objects Memory objects may reside on remote ...
... Passes messages by moving memory pointers to shared memory objects where possible – avoids object copy Uses virtual memory re-mapping to transfer large messages – also known as virtual copy or copy-on-write. Memory management is based on the use of memory objects Memory objects may reside on remote ...
BBA IInd SEMESTER EXAMINATION 2008-09
... priorities are 3, 5, 2, 1, and 4, respectively, with 5 being the highest priority. For each of the following scheduling algorithms, determine the mean process turnaround time. Ignore process switching overhead. ...
... priorities are 3, 5, 2, 1, and 4, respectively, with 5 being the highest priority. For each of the following scheduling algorithms, determine the mean process turnaround time. Ignore process switching overhead. ...
Services - University of Worcester
... Services loaded before user login – act independently of the user – typically stored in the systemroot\System32 and systemroot\System32\Drivers folders – use .exe, .sys, or .dll file name extensions ...
... Services loaded before user login – act independently of the user – typically stored in the systemroot\System32 and systemroot\System32\Drivers folders – use .exe, .sys, or .dll file name extensions ...
08-OS-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) ...
Operating Systems
... • 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 ...
Transparency in Distributed Systems
... The present day network architectures are becoming more and more complicated due to heterogeneity of the network components and mainly due to the extensive use of the Internet services. For instance a company may have many branches operating at different geographical locations and may need to intera ...
... The present day network architectures are becoming more and more complicated due to heterogeneity of the network components and mainly due to the extensive use of the Internet services. For instance a company may have many branches operating at different geographical locations and may need to intera ...
COS 318: Operating Systems OS Structures and System Calls Andy Bavier
... parameters The call mechanism switches code to kernel mode Execute system call Return with results (Like a procedure call, just crosses kernel boundary) ...
... parameters The call mechanism switches code to kernel mode Execute system call Return with results (Like a procedure call, just crosses kernel boundary) ...
Operating System
... CPU utilization and then the interactive computing was introduced. Linus, Torvalds, a Finnish student, developed an ultra small Unix, called Linux, that could easily fit on a personal computer. Linux has a modular design ensuring high dependability and portability. Time-shared systems allowed multip ...
... CPU utilization and then the interactive computing was introduced. Linus, Torvalds, a Finnish student, developed an ultra small Unix, called Linux, that could easily fit on a personal computer. Linux has a modular design ensuring high dependability and portability. Time-shared systems allowed multip ...
Operating Systems
... Process states, Process Scheduling, Process hierarchy, Threads, Threading issues, Multithreading models, Non-pre-emptive and pre-emptive scheduling algorithms, Concurrent processes, Critical section, Semaphores, methods for inter-process communication, Deadlocks. [1] Page 101 to 113, Page 115 to 122 ...
... Process states, Process Scheduling, Process hierarchy, Threads, Threading issues, Multithreading models, Non-pre-emptive and pre-emptive scheduling algorithms, Concurrent processes, Critical section, Semaphores, methods for inter-process communication, Deadlocks. [1] Page 101 to 113, Page 115 to 122 ...
Powerpoint () - UCSB Computer Science
... Assume that the file-control block (and the index block, in the case of indexed allocation) is already in memory. Calculate the number of disk I/O operations are required for contiguous, linked, and indexed (single-level) allocation strategies, if, for one block,the following conditions hold. In the ...
... Assume that the file-control block (and the index block, in the case of indexed allocation) is already in memory. Calculate the number of disk I/O operations are required for contiguous, linked, and indexed (single-level) allocation strategies, if, for one block,the following conditions hold. In the ...
COS 318: Operating Systems OS Structures and System Calls Prof. Margaret Martonosi
... Library Stubs for System Calls ...
... Library Stubs for System Calls ...
Topic 1: Introduction to Computers and Programming
... There are two primary types of storage in a computer: ...
... There are two primary types of storage in a computer: ...
LectureL
... How? Define an OS time-slice (tick) at which highest priority ‘runnable’ task is continued. Priority function determines response behavior. Simplest Scheduling algorithm: each task gets at most 1 tick at a time to run. Round Robin Scheduling. Worst case task latency = #tasks*tick. Worst case run ...
... How? Define an OS time-slice (tick) at which highest priority ‘runnable’ task is continued. Priority function determines response behavior. Simplest Scheduling algorithm: each task gets at most 1 tick at a time to run. Round Robin Scheduling. Worst case task latency = #tasks*tick. Worst case run ...
Chapter 7A Functions of Operating Systems Types of Operating
... • Command line interfaces – Older interface • DOS, Linux, UNIX ...
... • Command line interfaces – Older interface • DOS, Linux, UNIX ...
Operating Systems I: Chapter 4
... A process is an exact duplicate of its parent with its own (replicated) memory space, stack space, and PCB. – It is useful to allow the creation of tightly-coupled children that don’t require unique copies of the code/data memory or OS resources A thread (or lightweight process) is a basic unit of C ...
... A process is an exact duplicate of its parent with its own (replicated) memory space, stack space, and PCB. – It is useful to allow the creation of tightly-coupled children that don’t require unique copies of the code/data memory or OS resources A thread (or lightweight process) is a basic unit of C ...
Cont.
... • hence the programs share the CPU • but, this is a different kind of sharing than before... • Time-multiplexed sharing • “a resource is not divided into units, but instead, one program is assigned the entire resource for a period of time” ...
... • hence the programs share the CPU • but, this is a different kind of sharing than before... • Time-multiplexed sharing • “a resource is not divided into units, but instead, one program is assigned the entire resource for a period of time” ...
Module 1: Introduction What is an Operating System?
... • Time-Sharing Systems • Personal-Computer Systems • Parallel Systems • Distributed Systems • Real-Time Systems ...
... • Time-Sharing Systems • Personal-Computer Systems • Parallel Systems • Distributed Systems • Real-Time Systems ...
A1_OS Review_SP09
... Multi tasking: Multitasking is the logical extension of multiprogramming. After a certain amount of time the CPU is switched to another job. The difference is that the switching between jobs occurs so frequently that the users can interact with each program while it is running. This concept is also ...
... Multi tasking: Multitasking is the logical extension of multiprogramming. After a certain amount of time the CPU is switched to another job. The difference is that the switching between jobs occurs so frequently that the users can interact with each program while it is running. This concept is also ...
Integrated End-to-End Dependability in the Loris Storage Stack,
... observe that even in a POSIX environment, many groups of applications do not share any state with each other, which means that it is not necessary to have a single VFS instance manage them all. With this in mind, we can divide the applications on the system into independent groups, each consisting o ...
... observe that even in a POSIX environment, many groups of applications do not share any state with each other, which means that it is not necessary to have a single VFS instance manage them all. With this in mind, we can divide the applications on the system into independent groups, each consisting o ...
Document
... • Resources are protected by Access Control Lists with different user having different rights. • Many users or background tasks are active at any time. Regular users cannot shutdown the machine because this would interrupt other peoples work. Quotas are set for all resources on this system to preven ...
... • Resources are protected by Access Control Lists with different user having different rights. • Many users or background tasks are active at any time. Regular users cannot shutdown the machine because this would interrupt other peoples work. Quotas are set for all resources on this system to preven ...