How to Calculate Cache Hit Rate

Optimizing the cache can speed up computer performance.

A computer cache refers to a separate register file that acts as temporary and secondary memory during computer calculations and operations. The cache's purpose is to make data that is more frequently accessed in the course of a program readily available. The cache works by storing the value in a slot in its file register, with newer values replacing older and less used ones. Cache hit rate refers to the percentage of calls to the cache that are successful in retrieving the desired data.

Instructions

1. Divide the number of cache hits by the total number of requests.

2. Multiply this number by 100.

3. Round the number to the nearest tenth decimal place. This is your cache hit rate percentage.

References

• "Computer Systems, A Programmer's Perspective"; Randal E. Bryant and David O'Hallaron; 2003