Evolution of Operating System
... o At end of time slice current job is set aside and a new one starts o By rapidly shuffling jobs, illusion of several jobs executing simultaneously is created ...
... o At end of time slice current job is set aside and a new one starts o By rapidly shuffling jobs, illusion of several jobs executing simultaneously is created ...
Disco: Running Commodity Operating Systems on Scalable
... System Software for Shared Memory Multiprocessor ...
... System Software for Shared Memory Multiprocessor ...
CS 519 Operating Systems Theory Spring 1998
... traditional approach: OS provides a sufficiently large virtual address space for each running application, does memory allocation and replacement and may ensure protection new approaches: external memory management, huge (64-bit) address space, global memory ...
... traditional approach: OS provides a sufficiently large virtual address space for each running application, does memory allocation and replacement and may ensure protection new approaches: external memory management, huge (64-bit) address space, global memory ...
Memory Management
... I/O operations left processor idle. Solution: Run another program while reading in a new program. Must expand memory to support multiple jobs. Features introduced on Monitor-type computer operating systems: Multiprogramming: Support >= 3 programs concurrently. Memory protection: Applicatio ...
... I/O operations left processor idle. Solution: Run another program while reading in a new program. Must expand memory to support multiple jobs. Features introduced on Monitor-type computer operating systems: Multiprogramming: Support >= 3 programs concurrently. Memory protection: Applicatio ...
2. OS Components
... Main memory is the only place where the program is loaded to run. It should be used effectively to fit as many programs as possible The operating system is responsible for the following activities with the memory management Keep track of which parts of memory are currently being used and by whom ...
... Main memory is the only place where the program is loaded to run. It should be used effectively to fit as many programs as possible The operating system is responsible for the following activities with the memory management Keep track of which parts of memory are currently being used and by whom ...
Operating Systems
... • Interactive computer systems are programs that allow users to enter data or commands. • Most popular programs, such as word processors and spreadsheet applications, are interactive. • In interactive processing, the application responds to commands as quickly as it can once they have ...
... • Interactive computer systems are programs that allow users to enter data or commands. • Most popular programs, such as word processors and spreadsheet applications, are interactive. • In interactive processing, the application responds to commands as quickly as it can once they have ...
Operating System
... operating-systems research and development. System development is done on the virtual machine, instead of on a physical machine and so does not disrupt normal system operation. The virtual machine concept is difficult to implement due to the effort required to provide an exact duplicate to the und ...
... operating-systems research and development. System development is done on the virtual machine, instead of on a physical machine and so does not disrupt normal system operation. The virtual machine concept is difficult to implement due to the effort required to provide an exact duplicate to the und ...
Slide 1
... manager must find and assign memory space for these needs. The task of the memory manager is complicated further when the total main memory space required exceeds the space actually available in the computer. In this case the memory manager may create the illusion of additional memory space by rotat ...
... manager must find and assign memory space for these needs. The task of the memory manager is complicated further when the total main memory space required exceeds the space actually available in the computer. In this case the memory manager may create the illusion of additional memory space by rotat ...
LECT03
... o At end of time slice current job is set aside and a new one starts o By rapidly shuffling jobs, illusion of several jobs executing simultaneously is created ...
... o At end of time slice current job is set aside and a new one starts o By rapidly shuffling jobs, illusion of several jobs executing simultaneously is created ...
Document
... This course involves study of concepts and components of general purpose operating systems. These include the study of processes and process synchronization, multithreaded applications, deadlocks, memory management, and file systems. UNIX and Windows NT are general purpose operating systems used as ...
... This course involves study of concepts and components of general purpose operating systems. These include the study of processes and process synchronization, multithreaded applications, deadlocks, memory management, and file systems. UNIX and Windows NT are general purpose operating systems used as ...
Document - Oman College of Management & Technology
... unit structure that construct the secondary storage device) in tree structure . Support of primitives for manipulating files and directories. Mapping files onto secondary storage(connect between logical and physical files). File backup on stable (nonvolatile) storage media (backup means save a ...
... unit structure that construct the secondary storage device) in tree structure . Support of primitives for manipulating files and directories. Mapping files onto secondary storage(connect between logical and physical files). File backup on stable (nonvolatile) storage media (backup means save a ...
(1) OS: Operating System
... IS – MANAGEMENT OPERATING SYSTEMS PAPER CODE: MCIS 4: IS- Mgt. PPW: 5, Credits : 4 ...
... IS – MANAGEMENT OPERATING SYSTEMS PAPER CODE: MCIS 4: IS- Mgt. PPW: 5, Credits : 4 ...
Operating Systems
... increases the amount of data that can be held in memory at one time. When the memory chips get full, some of the data is paged out to the hard disk. This is called swapping. Windows uses a swap file for this purpose. Storage A more technical task is that of disk management. Under some operating syst ...
... increases the amount of data that can be held in memory at one time. When the memory chips get full, some of the data is paged out to the hard disk. This is called swapping. Windows uses a swap file for this purpose. Storage A more technical task is that of disk management. Under some operating syst ...
ppt
... to assure exclusivity Interposition on all DMA requests allows to share disk and memory resources among virtual machines and allows VMs to communicate with each other ...
... to assure exclusivity Interposition on all DMA requests allows to share disk and memory resources among virtual machines and allows VMs to communicate with each other ...
operating system
... • A distributed system is a collection of processors that do not share memory or a clock. Each processor has its own local memory. • The processors in the system are connected through a communication network. • Communication takes place using a protocol. • Access to a shared resource allows: ...
... • A distributed system is a collection of processors that do not share memory or a clock. Each processor has its own local memory. • The processors in the system are connected through a communication network. • Communication takes place using a protocol. • Access to a shared resource allows: ...
1 - Erode Sengunthar Engineering College
... 2.Time spent waiting to get into memory + waiting in the ready queue + executing on the CPU + doing I/O .So the turn around time may be large value in certain cases. ...
... 2.Time spent waiting to get into memory + waiting in the ready queue + executing on the CPU + doing I/O .So the turn around time may be large value in certain cases. ...
CSC 150 UNGRADED QUIZ - Concordia University Wisconsin
... for programs and data; Avoids conflicts (protects O/S and application instructions and data); Creates virtual memory, e.g. in Windows by demand paging. Creates illusion we have more memory than we do. ...
... for programs and data; Avoids conflicts (protects O/S and application instructions and data); Creates virtual memory, e.g. in Windows by demand paging. Creates illusion we have more memory than we do. ...
Page 1 •Program Execution •I/O Operation •File System
... devices. • It is volatile, not too large, not too slow. • The Manager is responsible for: Keep track of used and unused memory segments. Keep track which process is using which segment. Decide which processes to load when memory is available. Allocate and deallocate memory space. ...
... devices. • It is volatile, not too large, not too slow. • The Manager is responsible for: Keep track of used and unused memory segments. Keep track which process is using which segment. Decide which processes to load when memory is available. Allocate and deallocate memory space. ...
Page table
... ◦ Cluster size is 4096 bytes with disks > 4GB ◦ If the (block) sector size on disk is 512 bytes, this means each cluster is going to be 8 (blocks) ...
... ◦ Cluster size is 4096 bytes with disks > 4GB ◦ If the (block) sector size on disk is 512 bytes, this means each cluster is going to be 8 (blocks) ...
Chapter 1 PowerPoint
... – When it has to wait (for I/O for example), OS switches to another job • 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 – Response time should be < 1 second – Each use ...
... – When it has to wait (for I/O for example), OS switches to another job • 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 – Response time should be < 1 second – Each use ...
Chapter07-OSedition7Final
... Specifying that a process must be placed in the same memory region when it is swapped back in would be limiting may need to relocate the process to a different area of memory ...
... Specifying that a process must be placed in the same memory region when it is swapped back in would be limiting may need to relocate the process to a different area of memory ...
Chapter 2 Operating System Overview
... • Process isolation • Automatic allocation and management • Protection and access control ...
... • Process isolation • Automatic allocation and management • Protection and access control ...