Acquiring speculative approval for shared storage

摘要

In a processor, a method (500) for acquiring speculative permission to access a shared memory, having:Receive a memory instruction from a processor core to modify a first cache row in a first cache, wherein the first cache row and a second cache row in a second cache are in a shared state and comprise the same data content;in response to receiving the storage instruction, mark the first cache line as speculative;Modify the first cache line according to the storage instruction; andafter receiving a modification permission determined on the basis of a current state of the second cache row in the second cache, commit the storage instruction in the first cache row in the first cache.