thread
... don’t need special setups for shared memory when implementing communicating processes as threads in the same task. • Redundancy avoidance. If you need several versions of one program reading the same data at the same time, it’s inefficient to have each version implemented as a heavyweight process. N ...
... don’t need special setups for shared memory when implementing communicating processes as threads in the same task. • Redundancy avoidance. If you need several versions of one program reading the same data at the same time, it’s inefficient to have each version implemented as a heavyweight process. N ...
Chapter2
... • The OS manages system resources for users and applications • DOS (disk operating system): early commanddriven OS • Modern OSs: Windows 2000/XP, Linux, Mac OS X • Operating systems are divided into a kernel and user shell • Two OS running modes: real and protected ...
... • The OS manages system resources for users and applications • DOS (disk operating system): early commanddriven OS • Modern OSs: Windows 2000/XP, Linux, Mac OS X • Operating systems are divided into a kernel and user shell • Two OS running modes: real and protected ...
Forensics Book 2: Investigating Hard Disk and File and Operating
... Run level 1: Single-user mode Run level 2: Basic multi-user mode without NFS Run level 3: Full multi-user mode (text based) Run level 4: Unused Run level 5: Multi-user mode with graphical user interface Run level 6: Reboot system Copyright © by EC-Council Press All rights reserved. Repro ...
... Run level 1: Single-user mode Run level 2: Basic multi-user mode without NFS Run level 3: Full multi-user mode (text based) Run level 4: Unused Run level 5: Multi-user mode with graphical user interface Run level 6: Reboot system Copyright © by EC-Council Press All rights reserved. Repro ...
Message- passing and RPC Processes Processes vs. Threads
... n The CPU scheduler dispatches one process at a time onto the CPU n Associated with a process are values in the PC, SP, and other registers Insight (~1988) — these two are usually linked, but they don’t have to be In many recent operating systems (UNIX, Windows NT), the two are independent: l Proces ...
... n The CPU scheduler dispatches one process at a time onto the CPU n Associated with a process are values in the PC, SP, and other registers Insight (~1988) — these two are usually linked, but they don’t have to be In many recent operating systems (UNIX, Windows NT), the two are independent: l Proces ...
Omni-Kernel: An Operating System Architecture for Pervasive Monitoring and Scheduling
... between shared and core-specific state allows the framework to automate efficient multi-core scheduling of messages. Sharing typically occurs only when messages are sent by one core and queued for processing on another, or when a scheduler inspects shared state to select a core for an affinity label ...
... between shared and core-specific state allows the framework to automate efficient multi-core scheduling of messages. Sharing typically occurs only when messages are sent by one core and queued for processing on another, or when a scheduler inspects shared state to select a core for an affinity label ...
9 - PSNA College of Engineering and Technology
... context of the running process. The other is to switch to an interrupt service routine (ISR). The ROM may store ISRs. Before switching to an ISR, the context (the status of the present program) can be temporarily stored in RAM. All these requirements translate to management of multiple tasks with th ...
... context of the running process. The other is to switch to an interrupt service routine (ISR). The ROM may store ISRs. Before switching to an ISR, the context (the status of the present program) can be temporarily stored in RAM. All these requirements translate to management of multiple tasks with th ...
Experience Distributing Objects in an SMMP OS
... argue that the distributed implementations chosen are either optimal or even superior to equivalent highly-concurrent versions—rather it is to validate the methodology and gain insights into the techniques for constructing a system that can feasibly employ locality in a fine-grain fashion. For examp ...
... argue that the distributed implementations chosen are either optimal or even superior to equivalent highly-concurrent versions—rather it is to validate the methodology and gain insights into the techniques for constructing a system that can feasibly employ locality in a fine-grain fashion. For examp ...
Chapter 9 Uniprocessor Scheduling
... • A short process may have to wait a very long time before it can execute • Favors CPU-bound processes – FCFS performs better for long processes than short ones – I/O processes have to wait until CPU-bound process completes – Convoy effect: All other processes wait for the big process to finish ...
... • A short process may have to wait a very long time before it can execute • Favors CPU-bound processes – FCFS performs better for long processes than short ones – I/O processes have to wait until CPU-bound process completes – Convoy effect: All other processes wait for the big process to finish ...
PDF
... For different uses of network, people have strict requirement on available bandwidth estimation, like designing high performance network system, improving network protocol and building distributed system. However, bandwidth estimation is a problematic measurement where accuracy is difficult to achie ...
... For different uses of network, people have strict requirement on available bandwidth estimation, like designing high performance network system, improving network protocol and building distributed system. However, bandwidth estimation is a problematic measurement where accuracy is difficult to achie ...
lecture3
... •Process state: defines the readiness of the process to be scheduled for execution (e.g., running, ready, waiting, halted). •Priority: One or more fields may be used to describe the scheduling priority of the process. In some systems, several values are required (e.g., default, current, highest-allo ...
... •Process state: defines the readiness of the process to be scheduled for execution (e.g., running, ready, waiting, halted). •Priority: One or more fields may be used to describe the scheduling priority of the process. In some systems, several values are required (e.g., default, current, highest-allo ...
ch02_computer_struct
... System call – request to the operating system to allow user to wait for I/O completion Device-status table contains entry for each I/O device indicating its type, address, and state ...
... System call – request to the operating system to allow user to wait for I/O completion Device-status table contains entry for each I/O device indicating its type, address, and state ...
Windows XP Professional (70-270) LearnSmart
... Copyright © 2011 by PrepLogic, LCC Product ID: 010275 Production Date: July 18, 2011 Total Questions: 25 All rights reserved. No part of this document shall be stored in a retrieval system or transmitted by any means, electronic, mechanical, photocopying, recording, or otherwise, without written per ...
... Copyright © 2011 by PrepLogic, LCC Product ID: 010275 Production Date: July 18, 2011 Total Questions: 25 All rights reserved. No part of this document shall be stored in a retrieval system or transmitted by any means, electronic, mechanical, photocopying, recording, or otherwise, without written per ...
lecture 9
... a process enters the ready queue, its PCB is linked onto the tail of the queue. When CPU is free, it is allocated to the process at the head of the queue. The running process is removed from the queue. The average waiting time under FCFS policy is not minimal and may vary substantially if the proces ...
... a process enters the ready queue, its PCB is linked onto the tail of the queue. When CPU is free, it is allocated to the process at the head of the queue. The running process is removed from the queue. The average waiting time under FCFS policy is not minimal and may vary substantially if the proces ...
ch2
... System call – request to the operating system to allow user to wait for I/O completion Device-status table contains entry for each I/O device indicating its type, address, and state ...
... System call – request to the operating system to allow user to wait for I/O completion Device-status table contains entry for each I/O device indicating its type, address, and state ...
cs0206 operating systems
... data and for the control of these functions. The operating system is responsible for managing these resources. The operating system is nothing more than a computer program. The operating system functions in the same way as ordinary computer software; that is, it is a program executed by the processo ...
... data and for the control of these functions. The operating system is responsible for managing these resources. The operating system is nothing more than a computer program. The operating system functions in the same way as ordinary computer software; that is, it is a program executed by the processo ...
About the Presentations
... – Password guessing and eavesdropping attacks are likely on inbound access attempts ...
... – Password guessing and eavesdropping attacks are likely on inbound access attempts ...
Computer-System Operation
... service routine generally, through the interrupt vector, which contains the addresses of all the service routines. Interrupt architecture must save the address of the interrupted instruction. Incoming interrupts are disabled while another interrupt is being processed. A trap is a software-generated ...
... service routine generally, through the interrupt vector, which contains the addresses of all the service routines. Interrupt architecture must save the address of the interrupted instruction. Incoming interrupts are disabled while another interrupt is being processed. A trap is a software-generated ...
Slide 1
... Deadlock • Permanent blocking of a set of processes that either compete for system resources or communicate with each other • No efficient solution • Involve conflicting needs for resources by two or more processes ...
... Deadlock • Permanent blocking of a set of processes that either compete for system resources or communicate with each other • No efficient solution • Involve conflicting needs for resources by two or more processes ...
University of Tehran
... Systems what the goal of their resource management decisions should be Applications should be given as much control ...
... Systems what the goal of their resource management decisions should be Applications should be given as much control ...
The Kernel Real Time Operating Systems and Middleware
... Real-Time Operating Systems • Real-Time operating system (RTOS): OS providing support to Real-Time applications • Real-Time application: the correctness depends not only on the output values, but also on the time when such values are produced • Operating System: • Set of computer programs • Interfa ...
... Real-Time Operating Systems • Real-Time operating system (RTOS): OS providing support to Real-Time applications • Real-Time application: the correctness depends not only on the output values, but also on the time when such values are produced • Operating System: • Set of computer programs • Interfa ...
TMNet WinConfig Ver.3
... Chapter 2 Setting Network Parameters a maximum of three minutes for all the settings to become effective. 10 ItDotakes not turn off the device until the settings have become effective. After approximately 3 minutes, you can click [View] - [Refresh] to check the setting values. Furthermore, in some ...
... Chapter 2 Setting Network Parameters a maximum of three minutes for all the settings to become effective. 10 ItDotakes not turn off the device until the settings have become effective. After approximately 3 minutes, you can click [View] - [Refresh] to check the setting values. Furthermore, in some ...
Chapter 3 Process Description and Control
... both main and secondary memory. • Must include this information: – Allocation of main memory to processes – Allocation of secondary memory to processes – Protection attributes for access to shared memory regions – Information needed to manage virtual memory ...
... both main and secondary memory. • Must include this information: – Allocation of main memory to processes – Allocation of secondary memory to processes – Protection attributes for access to shared memory regions – Information needed to manage virtual memory ...
Optimizing the Migration of Virtual Computers
... 4. Collision-resistant hashes are used to avoid sending pages of memory or disk data that already exist at the destination. All network traffic is compressed with gzip[8]. We have implemented all the optimizations described in this paper in a basic prototype of our Collective system. Our prototype’s ...
... 4. Collision-resistant hashes are used to avoid sending pages of memory or disk data that already exist at the destination. All network traffic is compressed with gzip[8]. We have implemented all the optimizations described in this paper in a basic prototype of our Collective system. Our prototype’s ...