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3. Symmetrical multiprocessor caches
SMP symmetrical multiprocessors are parallel architectures with several processors, each with its own cache hierarchy, and a logically shared main memory, i.e. the same address space is visible to all processors. This logically shared memory can be physically shared (a single main memory) or physically distributed (each processor has its own local memory, but a single address space).
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Symmetrical multiprocessor caches
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