Conflict resolution of cache store and fetch requests

摘要

According to an embodiment, a computer system for cache management includes a processor and a cache, the computer system configured to perform a method including receiving a first store request for a first address in the cache and receiving a first fetch request for the first address in the cache. The method also includes executing the first store request and the first fetch request, latching the first store request in a store write-back pipeline in the cache, detecting, in the processor, a conflict following execution of the first store request and the first fetch request and receiving the first store request from a recycle path including the store write-back pipeline and executing the first store request a second time.

主权项

1. A computer system for cache management, the system comprising:
a processor and a cache, the computer system configured to perform a method comprising: receiving a first store request for a first address in the cache; receiving a first fetch request for the first address in the cache; executing the first store request and the first fetch request; latching the first store request in a store write-back pipeline in the cache; detecting, in the processor, a conflict following execution of the first store request and the first fetch request; and receiving the first store request from the recycle path including the store write-back pipeline and executing the first store request a second time, the receiving the first store request from the recycle path including the store write-back pipeline and executing the first store request a second time comprising:
executing the first store request a second time along with a second fetch request;receiving the first store request from the store write-back pipeline a second time and executing the first store request a third time based on a conflict that occurred while executing the first store request the second time along with the second fetch request;iterating a conflict counter up each time a conflict occurs while executing the first store request;comparing a value of the conflict counter to a conflict threshold; andexecuting the first store request based on the value of the conflict counter being equal to the threshold.