The Essentials ofComputer(computer) 452

The Essentials ofComputer(computer) 452 - generated an...

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CPU 1 Processor Single Bus Cache Processor Cache Processor Cache CPU 2 Memory Memory Input/ Output CPU 3 Interconnection CPU 1 memory CPU 2 memory CPU 3 memory a. global shared memory c. global shared memory with separate cache at processors b. distributed shared memory FIGURE 9.8 Shared Memory acclaimed of the early SMM machines was the cm* system with its 16 PDP-11 processors and 16 memory banks, all of which were connected using a tree network. The global shared memory was divided equally among the processors. If a processor
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Unformatted text preview: generated an address, it would first check its local memory. If the address was not found in local memory, it was passed on to a controller. The controller would try to locate the address within the processors that occupied the subtree for which it was the root. If the required address still could not be located, the request was passed up the tree until the data was found or the system ran out of places to look....
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