US 11,768,779 B2 · Cache management based on access type priority

Abstract

Systems, apparatuses, and methods for cache management based on access type priority are disclosed. A system includes at least a processor and a cache. During a program execution phase, certain access types are more likely to cause demand hits in the cache than others. Demand hits are load and store hits to the cache. A run-time profiling mechanism is employed to find which access types are more likely to cause demand hits. Based on the profiling results, the cache lines that will likely be accessed in the future are retained based on their most recent access type. The goal is to increase demand hits and thereby improve system performance. An efficient cache replacement policy can potentially reduce redundant data movement, thereby improving system performance and reducing energy consumption.

Claims20

Dependent claims

A system, comprising:

a processor;
and
a cache comprising circuitry configured to:
maintain, for each of a plurality of cache lines, a last access type indication;
maintain a plurality of counters, the plurality of counters including a separate counter for each of a plurality of different access types;
assign a lowest priority to a given access type which corresponds to a counter that indicates a lowest number of demand hits;
and
responsive to detecting a cache miss, prioritize evicting a cache line with a last access type field that corresponds to the given access type.

5 more elements

Dependencies are inferred from the claim text.

Cache management based on access type priority

Life of this patent

Cache management based on access type priority

Life of this patent

Abstract

Claims20