Read For Ownership

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A Read For Ownership (RFO) is an operation in cache coherency protocols. The operation is issued by a processor trying to write into a cache line that is not exclusive to itself, i.e., that is in the shared (S) or invalid (I) states of the MESI protocol. The operation causes all other processors to set the state of such line to I.

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Categories: Central processing unit | Computer memory | Parallel computing | Concurrent computing