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What is Memory Barriers about?

The document discusses the necessity of memory barriers in CPU design, particularly in the context of symmetric multiprocessing (SMP) systems, where reordering memory references can enhance performance but requires strict ordering for synchronization. It explains the structure and functioning of CPU caches, cache-coherency protocols, and the MESI protocol, which manages cache line states to maintain data consistency across multiple CPUs. The document emphasizes the complexity of ensuring coherent data views

Author

infernorift44

Language

EN