Regarding declaration of exclusive access, if one processor wants exclusive access to the data which has been loaded with another processor, can this request be rejected by cache controller?
bpr
@lusiliang93, yes. Caches can "NACK" (negative acknowledge) the request forcing the requester to retry. Some of these cases were covered in the implementation lecture, and we will revisit them when we discuss implementing synchronization.
Regarding declaration of exclusive access, if one processor wants exclusive access to the data which has been loaded with another processor, can this request be rejected by cache controller?
@lusiliang93, yes. Caches can "NACK" (negative acknowledge) the request forcing the requester to retry. Some of these cases were covered in the implementation lecture, and we will revisit them when we discuss implementing synchronization.