Profiling cache replacement

This document describes profiling cache replacement. Profiling cache replacement is a technique for managing data migration between a main memory and a cache memory to improve overall system performance. Unlike conventional cache replacement techniques, profiling cache replacement employs a profiler to maintain counters that count memory requests for access to not only the pages maintained in the cache memory, but also the pages maintained in the main memory. Based on the information collected by the profiler (e.g., about memory access requests), a mover moves pages between the main and cache memories. By way of example, the mover can swap highly-requested pages of the main memory, such as a most-requested page of the main memory, with little-requested pages of the cache memory, such as a least-requested page of the cache memory. The mover can do so, for instance, when the counters indicate that the number of page access requests for highly-requested pages of the main memory is greater than the number of page