Patent ID: 11880304
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 14:
15. A computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a processor to cause the processor to perform operations comprising:
receiving, by a cache-controller, a fetch request for data of a cache line from a requestor, the fetch request comprising a cache scope space;
unsuccessfully searching, by the cache-controller, for the data within a high-level cache that is local to the requestor;
determining, by the cache-controller, a cache scope designation associated with the fetch request;
determining, by the cache-controller, that the cache scope designation specifies a lower-level cache relative to the high-level cache;
in response to determining the cache scope designation specifies the lower-level cache, searching, by the cache-controller, for the data within a next-level cache that is at least one cache-level lower from the high-level cache;
when the data is not within the next-level cache, determining, by the cache-controller, whether the next-level cache equals the lower-level cache; and
when the next-level cache equals the lower-level cache, transmitting, by the cache-controller, a cache-miss message to the requestor.