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In ARM CHI spec, what is the difference between using ReadShared with exclusive access vs ReadUnique?

Deboleena Sakalley

ReadShared with exclusive access is used to read a location with the intention of updating the location. The same thing can be done using ReadUnique which ensures that the requester gets a unique copy that can then be modified. What is the difference between the two and when would one be used compared to the other?

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