Reduction of cache miss rates using shared private caches

摘要

Methods and systems for reducing cache miss rates for cache are disclosed. Embodiments may include a computer system with one or more processors and each processor may couple with a private cache. Embodiments selectively enable and implement a cache re-allocation scheme for cache lines of the private caches based upon a workload or an expected workload for the processors. In particular, a cache miss rate monitor may count the number of cache misses for each processor. A cache miss rate comparator compares the cache miss rates to determine whether one or more of the processors have significantly higher cache miss rates than the average cache miss rates within a processor module or overall. If one or more processors have significantly higher cache miss rates, cache requests from those processors are forwarded to private caches that have lower cache miss rates and have the least recently used cache lines.