HistoryAndHardware
... Each CPU runs an identical copy of the operating system. Many processes can run at once without performance deterioration. Most modern operating systems support SMP Asymmetric multiprocessing Each processor is assigned a specific task; master processor schedules and allocated work to slave ...
... Each CPU runs an identical copy of the operating system. Many processes can run at once without performance deterioration. Most modern operating systems support SMP Asymmetric multiprocessing Each processor is assigned a specific task; master processor schedules and allocated work to slave ...
Chapter 1 (Part 2) Introduction to Operating System
... A master processor controls the system. The other processors either look to the master for instructions or have predefined tasks. Thus, this defines a master-slave relationship master processor schedules and allocated work to slave processors. More common in extremely large systems ...
... A master processor controls the system. The other processors either look to the master for instructions or have predefined tasks. Thus, this defines a master-slave relationship master processor schedules and allocated work to slave processors. More common in extremely large systems ...
lecture2
... policy to the compiler and/or the application level are often called language-based security. The lack of many critical security mechanisms in current mainstream operating systems impedes the implementation of adequate security policies at the application abstraction level. In fact, a common miscon ...
... policy to the compiler and/or the application level are often called language-based security. The lack of many critical security mechanisms in current mainstream operating systems impedes the implementation of adequate security policies at the application abstraction level. In fact, a common miscon ...
15.a The Internal Operating System
... Reduced OS overhead for resource allocation and process management Substantially less information than a normal PCB Chapter 15 The Internal Operating System – Part 1 ...
... Reduced OS overhead for resource allocation and process management Substantially less information than a normal PCB Chapter 15 The Internal Operating System – Part 1 ...
A: Process termination requires reclaim of any reusable resources
... determines whether a process appears on this tab or not. Most applications that have a taskbar entry will appear on this tab, but this is not always the case Right-clicking any of the applications in the list allows (among other things) switching to that application, ending the application, and show ...
... determines whether a process appears on this tab or not. Most applications that have a taskbar entry will appear on this tab, but this is not always the case Right-clicking any of the applications in the list allows (among other things) switching to that application, ending the application, and show ...
G2_Survey_SynchronizationTools
... • Mutual-exclusion guarantees that certain sections of code (critical sections) will not be executed by more than one process simultaneously. These sections of code usually access shared variables in a common store or access shared hardware. • The standard solution to kernel-level mutualexclusion in ...
... • Mutual-exclusion guarantees that certain sections of code (critical sections) will not be executed by more than one process simultaneously. These sections of code usually access shared variables in a common store or access shared hardware. • The standard solution to kernel-level mutualexclusion in ...
PDF
... Users want to be able to designate high and low priority processes => priority scheduling ...
... Users want to be able to designate high and low priority processes => priority scheduling ...
Reagan Test Site Distributed Operations »
... ponents. Components communicate via middleware by sending messages using a publish-subscribe paradigm (Figure 6). A component subscribes to sources of data and publishes data for other components to use. The details of the actual transport can be specified by a configuration file; these details migh ...
... ponents. Components communicate via middleware by sending messages using a publish-subscribe paradigm (Figure 6). A component subscribes to sources of data and publishes data for other components to use. The details of the actual transport can be specified by a configuration file; these details migh ...
ppt
... Main advantages is the programmer has direct guidelines for the syntax and behavior of the threads, the program should work the same from computer platform to computer platform so more portable, far easier to use a standard package Main disadvantages are that the programmer loses the ability to take ...
... Main advantages is the programmer has direct guidelines for the syntax and behavior of the threads, the program should work the same from computer platform to computer platform so more portable, far easier to use a standard package Main disadvantages are that the programmer loses the ability to take ...
A1_OS Review
... to wait for some event the CPU is switched to another job. Primary objective: eliminate CPU idle time Time sharing: An extension of multiprogramming. After a certain amount of time the CPU is switched to another job regardless of whether the process/thread needs to wait for some operation. Switching ...
... to wait for some event the CPU is switched to another job. Primary objective: eliminate CPU idle time Time sharing: An extension of multiprogramming. After a certain amount of time the CPU is switched to another job regardless of whether the process/thread needs to wait for some operation. Switching ...
Microkernel Operating Systems
... E.g., interrupt handling, scheduling, programming the hardware E.g., memory management, file servers, network stack, device drivers ...
... E.g., interrupt handling, scheduling, programming the hardware E.g., memory management, file servers, network stack, device drivers ...
Using Information Technology - City University of Hong Kong
... Thin client - users download not only data but also different kinds of application software from an online source ...
... Thin client - users download not only data but also different kinds of application software from an online source ...
10-3_p2p CAN_cs218
... - How much traffic does one query generate? - how many hosts can it support at once? - What is the latency associated with querying? - Is there a bottleneck? ...
... - How much traffic does one query generate? - how many hosts can it support at once? - What is the latency associated with querying? - Is there a bottleneck? ...
MEMORY MANAGEMENT
... these accesses are not controlled, an error can occur. There must be some sort of mutual exclusion mechanism that permits only one routine at a time to perform an update against the file. The implementation of such mutual exclusion is difficult to verify as being correct under all possible sequences ...
... these accesses are not controlled, an error can occur. There must be some sort of mutual exclusion mechanism that permits only one routine at a time to perform an update against the file. The implementation of such mutual exclusion is difficult to verify as being correct under all possible sequences ...
OPERATING SYSTEMS:
... Security: limit the scope of what processes can do Privacy: limit each process to the data it is permitted to access Fairness: each should be limited to its appropriate share of system resources (CPU time, memory, I/O, etc) ...
... Security: limit the scope of what processes can do Privacy: limit each process to the data it is permitted to access Fairness: each should be limited to its appropriate share of system resources (CPU time, memory, I/O, etc) ...
Course Descriptions (CSE)-2010
... Introduction to MS WORD: Introduction to MS Word, document creation, editing, printing and saving, spell check and mail merge. Process text by using text processor package such as MS Word, Use of computer using windows operating system. C++ Introduction: Introduction to C++ Language, structure of C+ ...
... Introduction to MS WORD: Introduction to MS Word, document creation, editing, printing and saving, spell check and mail merge. Process text by using text processor package such as MS Word, Use of computer using windows operating system. C++ Introduction: Introduction to C++ Language, structure of C+ ...
DAS - Grid`5000
... - Applications can dynamically allocate light paths - Applications can change the topology of the wide-area network, possibly even at sub-second timescale ...
... - Applications can dynamically allocate light paths - Applications can change the topology of the wide-area network, possibly even at sub-second timescale ...
Programmability
... rich mechanisms for control, cooperation, and sharing • Asynchrony management for out of order arrival of data transfers and service completion • Guaranteed compound atomic operations for user programmed segments with efficient protection • OS protocol to inform runtime system – bi directional excha ...
... rich mechanisms for control, cooperation, and sharing • Asynchrony management for out of order arrival of data transfers and service completion • Guaranteed compound atomic operations for user programmed segments with efficient protection • OS protocol to inform runtime system – bi directional excha ...
Shim
... Isolation Architectures Isolation architecture was proposed to decrease the impact of an OS compromise. A separate layer is used below the OS, between OS and CPU or memory, in order to implement the isolation architecture. These architectures are implemented using microkernel or VMM. These architec ...
... Isolation Architectures Isolation architecture was proposed to decrease the impact of an OS compromise. A separate layer is used below the OS, between OS and CPU or memory, in order to implement the isolation architecture. These architectures are implemented using microkernel or VMM. These architec ...
11-CPU-Scheduling-In..
... These are performance metrics such as: • CPU utilization – high is good; the system works best when the CPU is kept as busy as possible. • Throughput – the number of processes that complete their execution per time unit. • Turnaround time – amount of time to execute a particular process. • Waiting t ...
... These are performance metrics such as: • CPU utilization – high is good; the system works best when the CPU is kept as busy as possible. • Throughput – the number of processes that complete their execution per time unit. • Turnaround time – amount of time to execute a particular process. • Waiting t ...
Lecture 6
... • Programming interface to the services provided by the OS • Typically written in a high-level language (C or C++) • Mostly accessed by programs via a high-level Application Programming Interface (API) rather than direct system call use • Three most common APIs are Win32 API for Windows, POSIX API f ...
... • Programming interface to the services provided by the OS • Typically written in a high-level language (C or C++) • Mostly accessed by programs via a high-level Application Programming Interface (API) rather than direct system call use • Three most common APIs are Win32 API for Windows, POSIX API f ...
OPERATING SYSTEMS QUESTIONS
... multiprogramming. It can be eliminated by reducing the level of multiprogramming. 11. What is multi tasking, multi programming, multi threading? - Multi programming: Multiprogramming is the technique of running several programs at a time using timesharing. It allows a computer to do several things a ...
... multiprogramming. It can be eliminated by reducing the level of multiprogramming. 11. What is multi tasking, multi programming, multi threading? - Multi programming: Multiprogramming is the technique of running several programs at a time using timesharing. It allows a computer to do several things a ...
Distributed operating system
A distributed operating system is a software over a collection of independent, networked, communicating, and physically separate computational nodes. Each individual node holds a specific software subset of the global aggregate operating system. Each subset is a composite of two distinct service provisioners. The first is a ubiquitous minimal kernel, or microkernel, that directly controls that node’s hardware. Second is a higher-level collection of system management components that coordinate the node's individual and collaborative activities. These components abstract microkernel functions and support user applications.The microkernel and the management components collection work together. They support the system’s goal of integrating multiple resources and processing functionality into an efficient and stable system. This seamless integration of individual nodes into a global system is referred to as transparency, or single system image; describing the illusion provided to users of the global system’s appearance as a single computational entity.