MERGING DEMAND LOAD REQUESTS WITH PREFETCH LOAD REQUESTS

摘要

A processor includes a processing unit, a cache memory, and a central request queue. The central request queue is operable to receive a prefetch load request for a cache line to be loaded into the cache memory, receive a demand load request for the cache line from the processing unit, merge the prefetch load request and the demand load request to generate a promoted load request specifying the processing unit as a requestor, receive the cache line associated with the promoted load request, and forward the cache line to the processing unit.

主权项

1. A processor, comprising:
a processing unit; a cache memory; and a central request queue operable to receive a prefetch load request for a cache line to be loaded into the cache memory, receive a demand load request for the cache line from the processing unit, merge the prefetch load request and the demand load request to generate a promoted load request specifying the processing unit as a requestor, receive the cache line associated with the promoted load request, and forward the cache line to the processing unit.