Hardware
... Operating System Exploits the hardware resources of one or more processors Provides a set of services to system users Manages secondary memory and I/O devices ...
... Operating System Exploits the hardware resources of one or more processors Provides a set of services to system users Manages secondary memory and I/O devices ...
Memory Mapped Files
... locate a block large enough for the allocation, mark it as allocated and return a pointer to it. Algorithms to locate a block include "first fit", "best fit" "quick fit“ and “buddy”. “First fit“ is the simplest: the list of free blocks is scanned until a free block large enough to satisfy the re ...
... locate a block large enough for the allocation, mark it as allocated and return a pointer to it. Algorithms to locate a block include "first fit", "best fit" "quick fit“ and “buddy”. “First fit“ is the simplest: the list of free blocks is scanned until a free block large enough to satisfy the re ...
Lecture 10
... – And completely understand it • This doesn’t mean publish everything important about your security system – Though sometimes that’s a good idea • Obscurity can provide some security, but it’s brittle – When the fog is cleared, the security disappears • Windows (closed design) is not more secure tha ...
... – And completely understand it • This doesn’t mean publish everything important about your security system – Though sometimes that’s a good idea • Obscurity can provide some security, but it’s brittle – When the fog is cleared, the security disappears • Windows (closed design) is not more secure tha ...
Module 3: Operating
... small to accommodate all data and programs permanently, the computer system must provide secondary storage to back up main memory. Most modern computer systems use disks as the principle on-line storage medium, for both programs and data. The operating system is responsible for the following act ...
... small to accommodate all data and programs permanently, the computer system must provide secondary storage to back up main memory. Most modern computer systems use disks as the principle on-line storage medium, for both programs and data. The operating system is responsible for the following act ...
Module 4: Processes
... memory, ready and waiting to execute. Device queues – set of processes waiting for an I/O ...
... memory, ready and waiting to execute. Device queues – set of processes waiting for an I/O ...
Process Control and Description
... when it is aborted because of an error. It can also be preempted out by another more important process, when it is no longer executable, but its associated tables and other information might still be available. ...
... when it is aborted because of an error. It can also be preempted out by another more important process, when it is no longer executable, but its associated tables and other information might still be available. ...
ADAPTING BASE STATION OPERABILITY SOFTWARE INTO LINUX AND SYMMETRIC MULTIPROCESSOR ARCHITECTURE
... the Operating System Embedded (OSE) real-time operating system. The OSE provides prioritybased scheduling and this guarantees that the most critical threads in the system can run immediately in response to a triggering message. Each OSE process runs program code in parallel (parallel processing) wit ...
... the Operating System Embedded (OSE) real-time operating system. The OSE provides prioritybased scheduling and this guarantees that the most critical threads in the system can run immediately in response to a triggering message. Each OSE process runs program code in parallel (parallel processing) wit ...
Operating System Services
... system itself via resource sharing Resource allocation - When multiple users or multiple jobs running concurrently, resources must be allocated to each of them Many types of resources - CPU cycles, main memory, file storage, I/O ...
... system itself via resource sharing Resource allocation - When multiple users or multiple jobs running concurrently, resources must be allocated to each of them Many types of resources - CPU cycles, main memory, file storage, I/O ...
Ans What is operating system
... 1) Round robin scheduling is essentially the preemptive version of ________. 1 FIFO 2 Shortest job first 3 Shortes remaining 4 Longest time first Ans ) 1 2) A page fault occurs 1) when the page is not in the memory 2) when the page is in the memory 3) when the process enters the blocked state 4 when ...
... 1) Round robin scheduling is essentially the preemptive version of ________. 1 FIFO 2 Shortest job first 3 Shortes remaining 4 Longest time first Ans ) 1 2) A page fault occurs 1) when the page is not in the memory 2) when the page is in the memory 3) when the process enters the blocked state 4 when ...
Chapter 1 – 15 Essay Question Review
... to have the capability to perform the required functions and know how to communicate between modules. However, if more functionality is required in the kernel, then the user can dynamically load modules into the kernel. The kernel can have sections with well-defined, protected interfaces, a desirabl ...
... to have the capability to perform the required functions and know how to communicate between modules. However, if more functionality is required in the kernel, then the user can dynamically load modules into the kernel. The kernel can have sections with well-defined, protected interfaces, a desirabl ...
CS153: Lecture 3
... Creating illusions that multiple tasks can run at the same time, even if there is only a single CPU » Also called multiprogramming » MS-DOS vs. Windows 95 (and onwards) » Analogy to human beings? ...
... Creating illusions that multiple tasks can run at the same time, even if there is only a single CPU » Also called multiprogramming » MS-DOS vs. Windows 95 (and onwards) » Analogy to human beings? ...
Using statistical simulation to achieve fast and accurate performance
... Allows applications to be written for execution on the widest range of platforms Eases encapsulation and migration of jobs between nodes on grid; e.g. Java VMs can be migrated VMs (c) 2005, J. E. Smith ...
... Allows applications to be written for execution on the widest range of platforms Eases encapsulation and migration of jobs between nodes on grid; e.g. Java VMs can be migrated VMs (c) 2005, J. E. Smith ...
Operating System Layer
... memory. Initially, all page frames associated with the regions are shared between the two processes’ page tables. The pages are initially write-protected at the hardware level, even though they may belong to regions that are logically writable. If a thread in either process attempts to modify the da ...
... memory. Initially, all page frames associated with the regions are shared between the two processes’ page tables. The pages are initially write-protected at the hardware level, even though they may belong to regions that are logically writable. If a thread in either process attempts to modify the da ...
Chapter 2: Operating-System Structures
... Chapter 2: Operating-System Structures Operating System Services User Operating System Interface System Calls Types of System Calls System Programs Operating System Design and Implementation Operating System Structure ...
... Chapter 2: Operating-System Structures Operating System Services User Operating System Interface System Calls Types of System Calls System Programs Operating System Design and Implementation Operating System Structure ...
Interrupts and interrupt handlers - Washington University in St. Louis
... Register new handlers with request_irq(), three key attributes: – IRQ number – IRQ handler function – Whether the IRQ is shared ...
... Register new handlers with request_irq(), three key attributes: – IRQ number – IRQ handler function – Whether the IRQ is shared ...
CS 350 Operating Systems Course Notes
... • multiprogramming means having multiple processes existing at the same time • most modern, general purpose operating systems support multiprogramming • all processes share the available hardware resources, with the sharing coordinated by the operating system: – Each process uses some of the availab ...
... • multiprogramming means having multiple processes existing at the same time • most modern, general purpose operating systems support multiprogramming • all processes share the available hardware resources, with the sharing coordinated by the operating system: – Each process uses some of the availab ...
Chapter 2: Operating
... Chapter 2: Operating-System Structures Operating System Services User Operating System Interface System Calls Types of System Calls System Programs Operating System Design and Implementation Operating System Structure ...
... Chapter 2: Operating-System Structures Operating System Services User Operating System Interface System Calls Types of System Calls System Programs Operating System Design and Implementation Operating System Structure ...
Module 6: CPU Scheduling
... If there are n processes in the ready queue and the time quantum is q, then each process gets 1/n of the CPU time in chunks of at most q time units at once. No process waits more than (n-1)q time units. ...
... If there are n processes in the ready queue and the time quantum is q, then each process gets 1/n of the CPU time in chunks of at most q time units at once. No process waits more than (n-1)q time units. ...
unit-1-The-UNIX-Operating-System
... that allow users and application programs to access system resources (e.g. the CPU, memory, disks, modems, printers, network cards etc.) in a safe, efficient and abstract way. For example, an OS ensures safe access to a printer by allowing only one application program to send data directly to the pr ...
... that allow users and application programs to access system resources (e.g. the CPU, memory, disks, modems, printers, network cards etc.) in a safe, efficient and abstract way. For example, an OS ensures safe access to a printer by allowing only one application program to send data directly to the pr ...
