ch22
... recovered after a crash, just that the file system data structures (the metadata files) are undamaged and reflect some consistent state prior to the crash The log is stored in the third metadata file at the beginning of the ...
... recovered after a crash, just that the file system data structures (the metadata files) are undamaged and reflect some consistent state prior to the crash The log is stored in the third metadata file at the beginning of the ...
VirtualMachines
... VM Performance Why is VM slower than physical hardware? Emulation: Sensitive instructions must be emulated. Interrupt Handling: VMM must handle interrupts, even if eventually passed to guest. Context Switches: VMM must save VM state when controlled transferred to VMM. Bookkeeping: VMM has to do wor ...
... VM Performance Why is VM slower than physical hardware? Emulation: Sensitive instructions must be emulated. Interrupt Handling: VMM must handle interrupts, even if eventually passed to guest. Context Switches: VMM must save VM state when controlled transferred to VMM. Bookkeeping: VMM has to do wor ...
Proceedings of the 5th Symposium on Operating Systems Design and Implementation USENIX Association
... to capsule disks, “ballooning” zeros unused memory, demand paging fetches only needed blocks, and hashing avoids sending blocks that already exist at the remote end. We demonstrate these optimizations in a prototype system that uses VMware GSX Server virtual machine monitor to create and run x86 cap ...
... to capsule disks, “ballooning” zeros unused memory, demand paging fetches only needed blocks, and hashing avoids sending blocks that already exist at the remote end. We demonstrate these optimizations in a prototype system that uses VMware GSX Server virtual machine monitor to create and run x86 cap ...
Chapter 1 – 15 Essay Question Review
... term scheduler must be fast. The long-term scheduler executes much less frequently; minutes may separate the creation of one new process and the next. The long-term scheduler controls the degree of multiprogramming. Because of the longer interval between executions, the long-term scheduler can affor ...
... term scheduler must be fast. The long-term scheduler executes much less frequently; minutes may separate the creation of one new process and the next. The long-term scheduler controls the degree of multiprogramming. Because of the longer interval between executions, the long-term scheduler can affor ...
CS 519: Operating System Theory
... Caches contain also the value of memory locations which are close to locations which were recently accessed (spatial locality) ...
... Caches contain also the value of memory locations which are close to locations which were recently accessed (spatial locality) ...
Operating system structures
... so frequently that users can interact with each job while it is running, creating interactive computing ...
... so frequently that users can interact with each job while it is running, creating interactive computing ...
What is an Operating System?
... Set up before scheduling process to regain control or terminate program that exceeds allotted time ...
... Set up before scheduling process to regain control or terminate program that exceeds allotted time ...
Lecture 1: Course Introduction and Overview
... Interfaces Provide Important Boundaries software instruction set ...
... Interfaces Provide Important Boundaries software instruction set ...
Towards Protecting Sensitive Files in a Compromised System
... to the underlying hardware. Different virtual machines can run different operating systems, which are referred ...
... to the underlying hardware. Different virtual machines can run different operating systems, which are referred ...
Adopting and Commenting the Old Kernel Source Code for Education
... Interrupt Descriptor Table (IDT) are in the kernel data segment, thus they are located in the same address in both address spaces. In the execution of code in setup.s in real mode, we have setup both temporary GDT and IDT at once. These are required before entering protected mode. Since they are loc ...
... Interrupt Descriptor Table (IDT) are in the kernel data segment, thus they are located in the same address in both address spaces. In the execution of code in setup.s in real mode, we have setup both temporary GDT and IDT at once. These are required before entering protected mode. Since they are loc ...
Ch 1
... I/O completion Wait instruction idles the CPU until the next interrupt Wait loop (contention for memory access) 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 ...
... I/O completion Wait instruction idles the CPU until the next interrupt Wait loop (contention for memory access) 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 ...
Silberschatz/7e Lecture Notes
... I/O completion Wait instruction idles the CPU until the next interrupt Wait loop (contention for memory access) 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 ...
... I/O completion Wait instruction idles the CPU until the next interrupt Wait loop (contention for memory access) 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 ...
What is an Operating System?
... Memory management of I/O including buffering (storing data temporarily while it is being transferred), caching (storing parts of data in faster storage for performance), spooling (the overlapping of output of one job with input of other jobs) ...
... Memory management of I/O including buffering (storing data temporarily while it is being transferred), caching (storing parts of data in faster storage for performance), spooling (the overlapping of output of one job with input of other jobs) ...
Chapter 1: Introduction
... Operating System Structure (Cont.) Timesharing (multitasking) is logical extension in which CPU switches jobs so frequently that users can interact with each job while it is running, creating interactive computing z ...
... Operating System Structure (Cont.) Timesharing (multitasking) is logical extension in which CPU switches jobs so frequently that users can interact with each job while it is running, creating interactive computing z ...
System and Process Virtualization
... and Virtualization • Operating System isolates Application from Hardware • Operating System is still closely integrated with hardware: device drivers, interrupts, #CPUs, disk layout, etc • Installing OS creates state • Installing Application within OS creates state • Moving installed Application fro ...
... and Virtualization • Operating System isolates Application from Hardware • Operating System is still closely integrated with hardware: device drivers, interrupts, #CPUs, disk layout, etc • Installing OS creates state • Installing Application within OS creates state • Moving installed Application fro ...
(IT) - Sem - III - Modern Operating System
... performance distributed computing. In Clustered systems, if the monitored machine fails, the monitoring machine can take ownership of its storage, and restart the application(s) that were running on the failed machine. The failed machine can remain down, but the users and clients of the application ...
... performance distributed computing. In Clustered systems, if the monitored machine fails, the monitoring machine can take ownership of its storage, and restart the application(s) that were running on the failed machine. The failed machine can remain down, but the users and clients of the application ...
File
... 24. What role do device controllers and device drivers play in a computer system? Ans: A general-purpose computer system consists of CPUs and multiple device controllers that are connected through a common bus. Each device controller is in charge of a specific type of device. The device controller i ...
... 24. What role do device controllers and device drivers play in a computer system? Ans: A general-purpose computer system consists of CPUs and multiple device controllers that are connected through a common bus. Each device controller is in charge of a specific type of device. The device controller i ...
Ch1 Homework Solution
... 24. What role do device controllers and device drivers play in a computer system? Ans: A general-purpose computer system consists of CPUs and multiple device controllers that are connected through a common bus. Each device controller is in charge of a specific type of device. The device controller i ...
... 24. What role do device controllers and device drivers play in a computer system? Ans: A general-purpose computer system consists of CPUs and multiple device controllers that are connected through a common bus. Each device controller is in charge of a specific type of device. The device controller i ...
Chapter 21 - Linux Operating System
... consumed by the process in its lifetime so far The file table is an array of pointers to kernel file structures ...
... consumed by the process in its lifetime so far The file table is an array of pointers to kernel file structures ...
Introduction
... 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 Operating System Concepts with Java – 8th Edition ...
... 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 Operating System Concepts with Java – 8th Edition ...
What is an Operating System?
... operating system running concurrently on one or more CPUs Concurrency by multiplexing the CPUs among the processes ...
... operating system running concurrently on one or more CPUs Concurrency by multiplexing the CPUs among the processes ...
Lecture 15
... • A relative of locks • Obtained from an entity that manages a resource – Gives client exclusive right to update the file – The lease “cookie” must be passed to server with an update – Lease can be released at end of critical section ...
... • A relative of locks • Obtained from an entity that manages a resource – Gives client exclusive right to update the file – The lease “cookie” must be passed to server with an update – Lease can be released at end of critical section ...
2. Operating Systems
... into memory and to run it. I/O operations – since user programs cannot execute I/O operations directly, the operating system must provide some means to perform I/O. File-system manipulation – program capability to read, write, create, and delete files. Communications – exchange of information betwee ...
... into memory and to run it. I/O operations – since user programs cannot execute I/O operations directly, the operating system must provide some means to perform I/O. File-system manipulation – program capability to read, write, create, and delete files. Communications – exchange of information betwee ...
Introduction - UW Courses Web Server
... • OS picks one of them to execute • The job may have to wait for a slow I/O operation to complete • OS picks & executes another job • OS Requirements: – Job scheduling – Memory management IBM System/360 CSS 430: Operating Systems - Introduction ...
... • OS picks one of them to execute • The job may have to wait for a slow I/O operation to complete • OS picks & executes another job • OS Requirements: – Job scheduling – Memory management IBM System/360 CSS 430: Operating Systems - Introduction ...
cs0206 operating systems
... During the interrupt cycle, the processor checks to see if any interrupts have occurred, indicated by the presence of an interrupt signal. If interrupt is pending, the processor suspends execution of the current program and executes an Interrupt Handling Routine. IHR determine the nature of interrup ...
... During the interrupt cycle, the processor checks to see if any interrupts have occurred, indicated by the presence of an interrupt signal. If interrupt is pending, the processor suspends execution of the current program and executes an Interrupt Handling Routine. IHR determine the nature of interrup ...