Windows NT Operating System
... because each one resides in a separate process whose memory is protected from other processes by the NT executive’s virtual memory system. They communicate with each other by passing messages. • The NT executive is capable of supporting any number of server processes. The servers give the NT executi ...
... because each one resides in a separate process whose memory is protected from other processes by the NT executive’s virtual memory system. They communicate with each other by passing messages. • The NT executive is capable of supporting any number of server processes. The servers give the NT executi ...
OS and Computer Architecture
... Crossing Protection Boundaries • System call: OS procedure that executes privileged instructions (e.g., I/O) ; also API exported by the kernel – Causes a trap, which vectors (jumps) to the trap handler in the OS kernel. – The trap handler uses the parameter to the system call to jump to the appropri ...
... Crossing Protection Boundaries • System call: OS procedure that executes privileged instructions (e.g., I/O) ; also API exported by the kernel – Causes a trap, which vectors (jumps) to the trap handler in the OS kernel. – The trap handler uses the parameter to the system call to jump to the appropri ...
History of Operating Systems
... • Originally the granularity of multiprogramming was at the level of a complete job • With virtual memory it became more efficient to swap pages rather than jobs • Also, jobs spent a lot of time using system calls to accomplish objectives and that involved processes running in the memory space of th ...
... • Originally the granularity of multiprogramming was at the level of a complete job • With virtual memory it became more efficient to swap pages rather than jobs • Also, jobs spent a lot of time using system calls to accomplish objectives and that involved processes running in the memory space of th ...
Operating Systems and Protection CS 217 1
... o Pro: totally independent operation of each process o Con: lots of extra hardware; some parts idle at any given time; hard limit on the number of processes ...
... o Pro: totally independent operation of each process o Con: lots of extra hardware; some parts idle at any given time; hard limit on the number of processes ...
Processes
... – Create and initialize the process control block (PCB) in the kernel – Create a new address space – Initialize the address space with a copy of the entire contents of the address space of the parent – Inherit the execution context of the parent (e.g., any open files) – Inform the scheduler that the ...
... – Create and initialize the process control block (PCB) in the kernel – Create a new address space – Initialize the address space with a copy of the entire contents of the address space of the parent – Inherit the execution context of the parent (e.g., any open files) – Inform the scheduler that the ...
Advanced Computer Architectures
... setting up the process description allocating an address space loading the program into the allocated address space, and passing the process description to the scheduler process states ready to run running wait ...
... setting up the process description allocating an address space loading the program into the allocated address space, and passing the process description to the scheduler process states ready to run running wait ...
The Abstraction: The Process
... this memory and gives it to the process. The OS will also likely initialize the stack with arguments; specifically, it will fill in the parameters to the main() function, i.e., argc and the argv array. The OS may also allocate some memory for the program’s heap. In C programs, the heap is used for e ...
... this memory and gives it to the process. The OS will also likely initialize the stack with arguments; specifically, it will fill in the parameters to the main() function, i.e., argc and the argv array. The OS may also allocate some memory for the program’s heap. In C programs, the heap is used for e ...
PPT - Duke Database Devils
... We discussed the need for protected contexts (“sandboxes”), even on single-user systems like your smartphone. The discussion touched on various dimensions of isolation for protected contexts (e.g., processes): •Fault isolation. One app or app instance (context or process) can fail independently of o ...
... We discussed the need for protected contexts (“sandboxes”), even on single-user systems like your smartphone. The discussion touched on various dimensions of isolation for protected contexts (e.g., processes): •Fault isolation. One app or app instance (context or process) can fail independently of o ...
Chapter 1 Basic Concepts of Operating Systems
... • The overall structure of an operating system is divided into the various software components using a topdown (layered) approach. • The top layer provides the easiest interface to the human operators and users interacting with the system. • Any layer uses the services or functions provided by the n ...
... • The overall structure of an operating system is divided into the various software components using a topdown (layered) approach. • The top layer provides the easiest interface to the human operators and users interacting with the system. • Any layer uses the services or functions provided by the n ...
Processes and System Calls
... the same time • All processes share the available hardware resources, with the sharing coordinated by the operating system: – Each process’ virtual memory is implemented using some of the available physical memory. The OS decides how much memory each process gets. – Each process’ threads are schedul ...
... the same time • All processes share the available hardware resources, with the sharing coordinated by the operating system: – Each process’ virtual memory is implemented using some of the available physical memory. The OS decides how much memory each process gets. – Each process’ threads are schedul ...
Processes and System Calls
... the same time • All processes share the available hardware resources, with the sharing coordinated by the operating system: – Each process’ virtual memory is implemented using some of the available physical memory. The OS decides how much memory each process gets. – Each process’ threads are schedul ...
... the same time • All processes share the available hardware resources, with the sharing coordinated by the operating system: – Each process’ virtual memory is implemented using some of the available physical memory. The OS decides how much memory each process gets. – Each process’ threads are schedul ...
here
... 5. Enumerate, explain, and differentiate between different mechanisms of interprocess communication and synchronisation 6. Analyse the architecture of a computer system and understand the significance of different architectural features and their affect on system administration. 7. Perform basic and ...
... 5. Enumerate, explain, and differentiate between different mechanisms of interprocess communication and synchronisation 6. Analyse the architecture of a computer system and understand the significance of different architectural features and their affect on system administration. 7. Perform basic and ...
Slide 1
... • Allows a single user to work on two or more applications that reside in memory at the same time ...
... • Allows a single user to work on two or more applications that reside in memory at the same time ...
Document
... This course is devoted to to provides a clear description of the main concepts of operating systems and algorithms. This course will introduce a wide range of topics that is not tied to one specific type of operating system. Particular emphasis will be given to the following topics: Operating System ...
... This course is devoted to to provides a clear description of the main concepts of operating systems and algorithms. This course will introduce a wide range of topics that is not tied to one specific type of operating system. Particular emphasis will be given to the following topics: Operating System ...
Final Report
... system simulator. The simulator allowed us to further investigate the topics that we discussed earlier in the semester and helped to reinforce the topics. Selecting this program also helped us gain a better understanding of exactly what was going on in the operating system. We gained a better apprec ...
... system simulator. The simulator allowed us to further investigate the topics that we discussed earlier in the semester and helped to reinforce the topics. Selecting this program also helped us gain a better understanding of exactly what was going on in the operating system. We gained a better apprec ...
09CS212 OPERATING SYSTEM Credits: 3:0:0 Course Objective: To
... 09CS212 OPERATING SYSTEM Credits: 3:0:0 Course Objective: To gain knowledge about the Operating Systems concepts such as process, main management, secondary memory management, CPU and disk scheduling etc. ...
... 09CS212 OPERATING SYSTEM Credits: 3:0:0 Course Objective: To gain knowledge about the Operating Systems concepts such as process, main management, secondary memory management, CPU and disk scheduling etc. ...
Processes
... delete it (can use exit system call) – Output data from child to parent (via wait) – Process’ resources are deallocated by operating system • Parent may terminate execution of children processes (abort) – Child has exceeded allocated resources – Task assigned to child is no longer required – If pare ...
... delete it (can use exit system call) – Output data from child to parent (via wait) – Process’ resources are deallocated by operating system • Parent may terminate execution of children processes (abort) – Child has exceeded allocated resources – Task assigned to child is no longer required – If pare ...
1. A(n) ______ is the unit of work in a system. A) process B
... A) gathers together multiple CPUs to accomplish computational work B) is an operating system that provides file sharing across a network C) is used when rigid time requirements are present D) can only operate one application at a time Ans: A 21. An initial bootstrap program is in the form of random- ...
... A) gathers together multiple CPUs to accomplish computational work B) is an operating system that provides file sharing across a network C) is used when rigid time requirements are present D) can only operate one application at a time Ans: A 21. An initial bootstrap program is in the form of random- ...
Difference Between Paging and segmentation
... Multi threading is a smart way to write concurrent software but it also comes with a price because the programmer has to be aware of race conditions when two or more threads try to access a shared resource and leave the system in an inconsistent state or a deadlock. Thread synchronization (for examp ...
... Multi threading is a smart way to write concurrent software but it also comes with a price because the programmer has to be aware of race conditions when two or more threads try to access a shared resource and leave the system in an inconsistent state or a deadlock. Thread synchronization (for examp ...
Contact Information
... in memory and on disk (the CPU is allocated to a job only if the job is in memory). A job swapped in and out of memory to the disk. Each user is executing a shell program. Takes user command and executes it. Waits for the next command. ...
... in memory and on disk (the CPU is allocated to a job only if the job is in memory). A job swapped in and out of memory to the disk. Each user is executing a shell program. Takes user command and executes it. Waits for the next command. ...
Multi-processor and Real
... Disadvantages of Load Sharing • Central queue needs mutual exclusion • Preemptive threads are unlikely resume execution on the same processor • If all threads are in the global queue, all threads of a program will not gain access to the processors at the same time ...
... Disadvantages of Load Sharing • Central queue needs mutual exclusion • Preemptive threads are unlikely resume execution on the same processor • If all threads are in the global queue, all threads of a program will not gain access to the processors at the same time ...
Chapter 10 Multiprocessor and Real
... • Central queue needs mutual exclusion • Preemptive threads are unlikely to resume execution on the same processor • If all threads are in the global queue, all threads of a program will not gain access to the processors at the same time ...
... • Central queue needs mutual exclusion • Preemptive threads are unlikely to resume execution on the same processor • If all threads are in the global queue, all threads of a program will not gain access to the processors at the same time ...
Lect03
... • We will be using the Linux operating system, which is very similar to UNIX. CMSC 104, Lecture 03 ...
... • We will be using the Linux operating system, which is very similar to UNIX. CMSC 104, Lecture 03 ...