ppt
... A piece of code (library) is “thread-safe” if it defines critical sections and uses synchronization to control access to them All entry points must be re-entrant Results not returned in shared global variables nor global statically allocated storage All calls should be synchronous ...
... A piece of code (library) is “thread-safe” if it defines critical sections and uses synchronization to control access to them All entry points must be re-entrant Results not returned in shared global variables nor global statically allocated storage All calls should be synchronous ...
Operating system/IT0307
... • The CPU is multiplexed among several jobs that are kept in memory and on disk (the CPU is allocated to a job only if the job is in memory). • A job is swapped in and out of memory to the disk. • On‐line communication between the user and the system is provided; when the operating system finishe ...
... • The CPU is multiplexed among several jobs that are kept in memory and on disk (the CPU is allocated to a job only if the job is in memory). • A job is swapped in and out of memory to the disk. • On‐line communication between the user and the system is provided; when the operating system finishe ...
ppt
... A piece of code (library) is “thread-safe” if it defines critical sections and uses synchronization to control access to them All entry points must be re-entrant Results not returned in shared global variables nor global statically allocated storage All calls should be synchronous ...
... A piece of code (library) is “thread-safe” if it defines critical sections and uses synchronization to control access to them All entry points must be re-entrant Results not returned in shared global variables nor global statically allocated storage All calls should be synchronous ...
Advanced Operating Systems
... best for all applications. OS is forced to make trade-offs Performance improvements of application-specific policies could be substantial Univ. of Tehran ...
... best for all applications. OS is forced to make trade-offs Performance improvements of application-specific policies could be substantial Univ. of Tehran ...
The following paper was originally published in the
... The motivation for reservation domains is to isolate the each reservation domain from the others. We would like to guarantee a lower bound on the performance of a reservation domain, which is independent of other reservation domains. Let i be the fraction of a resource allocated to a reservation do ...
... The motivation for reservation domains is to isolate the each reservation domain from the others. We would like to guarantee a lower bound on the performance of a reservation domain, which is independent of other reservation domains. Let i be the fraction of a resource allocated to a reservation do ...
What is an operating system?
... Multi-tasking Operating Systems Manages resources and processes to support different user applications ...
... Multi-tasking Operating Systems Manages resources and processes to support different user applications ...
more - Availability Digest
... Tandem supported two database systems – an hierarchical file system, Enscribe, and a relational SQL database, SQL/MP (MP for massively parallel). To guarantee no data loss, all disks in a Tandem system are mirrored. Transactions are applied to the disk mirrors by Tandem’s Transaction Management Faci ...
... Tandem supported two database systems – an hierarchical file system, Enscribe, and a relational SQL database, SQL/MP (MP for massively parallel). To guarantee no data loss, all disks in a Tandem system are mirrored. Transactions are applied to the disk mirrors by Tandem’s Transaction Management Faci ...
Porting OSE Systems to Linux
... Sometimes when using a computer, you find that there are better ways to solve something, and better tools to use. The many programs and usages of computers is one of the things that makes some of us find them so interesting. Ironically it is also one of the things that makes them confusing for other ...
... Sometimes when using a computer, you find that there are better ways to solve something, and better tools to use. The many programs and usages of computers is one of the things that makes some of us find them so interesting. Ironically it is also one of the things that makes them confusing for other ...
Figure 5.01
... application may allow a program to continue running even if part of it is blocked or is performing a length operation, thereby increasing responsiveness to the user. For example, a multithreaded Web browser could allow user interaction in one thread while an image was being loaded in another thread. ...
... application may allow a program to continue running even if part of it is blocked or is performing a length operation, thereby increasing responsiveness to the user. For example, a multithreaded Web browser could allow user interaction in one thread while an image was being loaded in another thread. ...
threads
... • A Mutex (Mutual Exclusion) is a data element that allows multiple threads to synchronize their access to shared resources • Like a binary semaphore, a mutex has two states, locked and unlocked • Only one thread can lock a mutex • Once a mutex is locked, other threads will block when they try to lo ...
... • A Mutex (Mutual Exclusion) is a data element that allows multiple threads to synchronize their access to shared resources • Like a binary semaphore, a mutex has two states, locked and unlocked • Only one thread can lock a mutex • Once a mutex is locked, other threads will block when they try to lo ...
lecture.9
... • A Mutex (Mutual Exclusion) is a data element that allows multiple threads to synchronize their access to shared resources • Like a binary semaphore, a mutex has two states, locked and unlocked • Only one thread can lock a mutex • Once a mutex is locked, other threads will block when they try to lo ...
... • A Mutex (Mutual Exclusion) is a data element that allows multiple threads to synchronize their access to shared resources • Like a binary semaphore, a mutex has two states, locked and unlocked • Only one thread can lock a mutex • Once a mutex is locked, other threads will block when they try to lo ...
Proceedings of BSDCon ’03 USENIX Association San Mateo, CA, USA September 8–12, 2003
... the real CPU throws privilege violation exceptions. However, it is not trivial to detect execution of such non-privileged instructions. To solve this problem, we use static rewriting of machine instructions at compile-time in two ways. One way is to insert an illegal instruction before each non-priv ...
... the real CPU throws privilege violation exceptions. However, it is not trivial to detect execution of such non-privileged instructions. To solve this problem, we use static rewriting of machine instructions at compile-time in two ways. One way is to insert an illegal instruction before each non-priv ...
Xen and the Art of Virtualization
... flexibility — running a full OS is more heavyweight than running a process, both in terms of initialization (e.g. booting or resuming versus fork and exec), and in terms of resource consumption. For our target of up to 100 hosted OS instances, we believe this price is worth paying; it allows individ ...
... flexibility — running a full OS is more heavyweight than running a process, both in terms of initialization (e.g. booting or resuming versus fork and exec), and in terms of resource consumption. For our target of up to 100 hosted OS instances, we believe this price is worth paying; it allows individ ...
RHEL High Level Design Version 1.3
... This document is provided “AS IS” with no express or implied warranties. Use the information in this document at your own risk. This document may be reproduced or distributed in any form without prior permission provided the copyright notice is retained on all copies. Modified versions of this docum ...
... This document is provided “AS IS” with no express or implied warranties. Use the information in this document at your own risk. This document may be reproduced or distributed in any form without prior permission provided the copyright notice is retained on all copies. Modified versions of this docum ...
Operating System Concepts
... slow performance Unlimited threads could exhaust system resources, such as CPU time or memory Solution: Thread Pools • Create a number of threads at process startup and place them in a pool where they await work Advantages: Usually slightly faster to service a request with an existing thread than cr ...
... slow performance Unlimited threads could exhaust system resources, such as CPU time or memory Solution: Thread Pools • Create a number of threads at process startup and place them in a pool where they await work Advantages: Usually slightly faster to service a request with an existing thread than cr ...
SLES High Level Design Version 3.16 1
... registered trademarks of International Business Machines Corporation in the United States, other countries, or both. Linux is a registered trademark of Linus Torvalds. UNIX is a registered trademark of The Open Group in the United States and other countries. Intel and Pentium are trademarks of Intel ...
... registered trademarks of International Business Machines Corporation in the United States, other countries, or both. Linux is a registered trademark of Linus Torvalds. UNIX is a registered trademark of The Open Group in the United States and other countries. Intel and Pentium are trademarks of Intel ...
An Operating System for Multicore and Clouds: Mechanisms and Implementation
... computational power at their fingertips. Users have progressed from using mainframes to minicomputers to personal computers to laptops, and most recently, to multicore and cloud computers. In the past, new operating systems have been written for each new class of computer hardware to facilitate reso ...
... computational power at their fingertips. Users have progressed from using mainframes to minicomputers to personal computers to laptops, and most recently, to multicore and cloud computers. In the past, new operating systems have been written for each new class of computer hardware to facilitate reso ...
The Essence of UNIX and Linux
... Labs), was the first UNIX command processor – Another Bell employee developed the Korn shell • History feature ...
... Labs), was the first UNIX command processor – Another Bell employee developed the Korn shell • History feature ...
Process Migration in Distributed Systems
... multiprocessor, Massively Parallel Processors (MPP) and Local Area Network (LAN) of computers. A process is an operating system (OS) entity of a program in execution. Associated with it are address space and other OS internal attributes such as home directory, open file descriptors, user id, program ...
... multiprocessor, Massively Parallel Processors (MPP) and Local Area Network (LAN) of computers. A process is an operating system (OS) entity of a program in execution. Associated with it are address space and other OS internal attributes such as home directory, open file descriptors, user id, program ...
etc/rc.boot
... for it, but the proper location for it (on a Linux system) is /sbin/init. If the kernel can't find init, it tries to run /bin/sh, and if that also fails, the startup of the system fails. When init starts, it finishes the boot process by doing a number of administrative tasks, such as checking filesy ...
... for it, but the proper location for it (on a Linux system) is /sbin/init. If the kernel can't find init, it tries to run /bin/sh, and if that also fails, the startup of the system fails. When init starts, it finishes the boot process by doing a number of administrative tasks, such as checking filesy ...
Socket
... the BSD Unix file access mechanism (open-readwrite-close) that provides an end-point for communication. ...
... the BSD Unix file access mechanism (open-readwrite-close) that provides an end-point for communication. ...
Programming with TCP/IP
... the BSD Unix file access mechanism (open-readwrite-close) that provides an end-point for communication. ...
... the BSD Unix file access mechanism (open-readwrite-close) that provides an end-point for communication. ...
Socket Programming
... the BSD Unix file access mechanism (open-readwrite-close) that provides an end-point for communication. ...
... the BSD Unix file access mechanism (open-readwrite-close) that provides an end-point for communication. ...
A Survey on Virtualization Technologies
... VM was a fully protected and isolated copy of the underlying system. Users could execute, develop, and test applications without ever having to fear causing a crash to systems used by other users on the same computer. Virtualization was thus used to reduce the hardware acquisition cost and improvin ...
... VM was a fully protected and isolated copy of the underlying system. Users could execute, develop, and test applications without ever having to fear causing a crash to systems used by other users on the same computer. Virtualization was thus used to reduce the hardware acquisition cost and improvin ...
Lec-11-13 - Synchronization
... Pi enters CS only if: either flag[j] = false or turn = I if both processes can be executing in their critical sections at the same time, then flag[0] ==flag[1] == true. This is restricted by value of turn which is either 0 or 1 but cannot be both 2. Progress requirement is satisfied 3. Bounded-waiti ...
... Pi enters CS only if: either flag[j] = false or turn = I if both processes can be executing in their critical sections at the same time, then flag[0] ==flag[1] == true. This is restricted by value of turn which is either 0 or 1 but cannot be both 2. Progress requirement is satisfied 3. Bounded-waiti ...