Instruction and logic for prefetcher throttling based on counts of memory accesses to data sources

摘要

A processor includes a core, a prefetcher, and a prefetcher control module. The prefetcher includes logic to make speculative prefetch requests through a memory subsystem for an element for execution by the core, and logic to store prefetched elements in a cache. The prefetcher control module includes logic to determine counts of memory accesses to two types of memory and, based upon the counts and the type of memory, reduce the speculative prefetch requests of the prefetcher.

主权项

1. A processor, comprising:
a core; a prefetcher, including circuitry to:
make speculative prefetch requests through a memory subsystem for an element for execution by the core; andstore prefetched elements in a cache; and a prefetcher control module, including:
determine a first count of memory accesses to a first type of memory;determine a second count of memory accesses to a second type of memory; andbased upon the first count, the second count, the first type, and the second type, reduce the speculative prefetch requests of the prefetcher.