By Abraham Silberschatz, Peter Baer Galvin, Greg Gagne
Celebrating its twentieth anniversary, Silberschatz: working structures suggestions, 6th version, keeps to supply an effective theoretical beginning for knowing working structures. The 6th version bargains more desirable conceptual insurance and extra content material to bridge the distance among suggestions and real implementations. Threads has been further to this most recent version and contains assurance of Pthreads and Java threads. All code examples were rewritten and at the moment are in C. elevated insurance of small footprint working structures akin to PalmOS and real-time working process, in addition to a brand new bankruptcy on home windows 2000, were added.
industry: computing device Scientists; Programmers.
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Additional resources for Operating System Concepts (6th Edition)
Loosely coupled system – each processor has its own local memory; processors communicate with one another through various communications lines, such as highspeed buses or telephone lines. ■ Advantages of distributed systems. 15 Silberschatz, Galvin and Gagne 2002 Distributed Systems (cont) ■ Requires networking infrastructure. ■ Local area networks (LAN) or Wide area networks (WAN) ■ May be either client-server or peer-to-peer systems. 17 Silberschatz, Galvin and Gagne 2002 Clustered Systems ■ Clustering allows two or more systems to share storage.
Monitor mode (also kernel mode or system mode) – execution done on behalf of operating system. ) ■ Mode bit added to computer hardware to indicate the current mode: monitor (0) or user (1). ■ When an interrupt or fault occurs hardware switches to monitor mode. Interrupt/fault monitor user set user mode Privileged instructions can be issued only in monitor mode. 19 Silberschatz, Galvin and Gagne 2002 I/O Protection ■ All I/O instructions are privileged instructions. , a user program that, as part of its execution, stores a new address in the interrupt vector).
19 Silberschatz, Galvin and Gagne 2002 I/O Protection ■ All I/O instructions are privileged instructions. , a user program that, as part of its execution, stores a new address in the interrupt vector). 21 Silberschatz, Galvin and Gagne 2002 Memory Protection ■ Must provide memory protection at least for the interrupt vector and the interrupt service routines. ■ In order to have memory protection, add two registers that determine the range of legal addresses a program may access: ✦ Base register – holds the smallest legal physical memory address.