Retrieval of previously accessed data in a multi-core processor

摘要

A multi-core processing apparatus may provide a cache probe and data retrieval method. The method may comprise sending a memory request from a requester to a record keeping structure. The memory request may have a memory address of a memory that stores requested data. The method may further comprise determining a last accessor of the memory address, sending a cache probe to the last accessor, determining the last accessor no longer has a copy of the line; and sending a request for the previously accessed version of the line. The request may bypass the tag-directories and obtain the requested data from memory.

主权项

1. A processor comprising:
a requester to send a memory request, the memory request having a memory address of a memory that stores requested data; a record keeping structure to receive the memory request; circuitry to determine a last accessor of the memory address; circuitry to send a cache probe to the last accessor; circuitry to determine the last accessor no longer has a copy of the line; and circuitry to send a request for previously accessed version of the line, the request bypassing the tag-directories and obtaining the requested data from memory.