COMPUTER ARCHITECTURE
MEMORY SYSTEMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The main problem is to solve the memory coherence problem that deals with the ____ of a piece of shared data lying in the main memories of two or more nodes.
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thrashing
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Granularity
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consistency
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None of the mentioned
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Explanation:
Detailed explanation-1: -The issue with shared memory systems is that many CPUs need fast access to memory and will likely cache memory, which has two complications: access time degradation: when several processors try to access the same memory location it causes contention. Trying to access nearby memory locations may cause false sharing.
Detailed explanation-2: -Distributed shared memory (DSM) provides a shared address space via software and/or hardware to processes on different nodes that do not physically share memory. A system with virtual memory hardware can use software to provide distributed shared virtual memory.
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