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Thursday, June 18, 2009

5. Differentiate symmetric multiprocessing and asymmetric multiprocessing

In the symmetric multiprocessing design, each processor is able to access the entire memory map; there are no master or slave processors. In this case each processor is non-unique and has equal power. This means that they can share memory between themselves and can interact with each other directly, regardless of how many there are in the system. People commonly confuse these architectures and as such it is important to define the differences. while asymmetric multiprocessing or ASMP allows applications to run specific subtasks on processors separate from the "master" processor. ASMP computers are comprised of multiple physical processors that are unique, and thus not symmetrical. These processors are defined as either master or slave: master processors are more capable than slaves and are given full control over what the slave processors do. ASMP is not in use in the modern world as it was overtaken by symmetric multiprocessing (SMP), which became common.

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