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The multiple-processor systems in use today are of two types. Some systems use asymmetric multiprocessing, in which each processor is assigned a specific task. A boss processor controls the system; the other processors either look to the boss for instruction or have predefined tasks. This scheme defines a boss–worker relationship. The boss processor schedules and allocates work to the worker processors. The most common systems use symmetric multiprocessing ( SMP),in which each processor performs all tasks within the operating system. SMP means that all processors are peers; no boss–worker relationship exists between processors. Figure 1.6 illustrates a typical SMP architecture. Notice that each processor has its own set of registers, as well as a private—or local —cache. However, all processors share physical memory.
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  • owner: miller - (no access) - Abraham Silberschatz_ Peter B Galvin_ Greg Gagne -Operating system concepts-Wiley (2012).pdf, p39
  • owner: hughleat - (no access) - Abraham-Silberschatz-Operating-System-Concepts---9th2012.12.pdf, p39


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