CSC 456 Spring 2012/10a AJ

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Prefetching and Consistency Models

Intro

Methods

Fixed vs. Adaptive Sequential Prefetching

Fixed sequential prefetching refers to prefetching of that occurs at a constant rate over time. Adaptive sequential prefetching, on the other hand, changes the rate of prefetching allowed over time. The prefetching rate is increased/decreased based on the count of successful prefetches. The rate is therefore dependent on workload and application (a start-up process will have a high rate of cold misses). While both methods improve efficiency, adaptive sequential prefetching is the most efficient as well as the most costly. (Dahlgren, Dubois)

Where they stand now

Why?