HISTORY BASED MEMORY SPECULATION FOR PARTITIONED CACHE MEMORIES

摘要

A cache memory that selectively enables and disables speculative reads from system memory is disclosed. The cache memory may include a plurality of partitions, and a plurality of registers. Each register may be configured to stored data indicative of a source of returned data for previous requests directed to a corresponding partition. Circuitry may be configured to receive a request for data to a given partition. The circuitry may be further configured to read contents of a register corresponding to the given partition, and initiate a speculative read dependent upon the contents of the register.

主权项

1. An apparatus, comprising:
a first memory including a plurality of partitions; at least one register configured to store history data, wherein the history data includes information indicative of a source of returned data for at least one previous read request; and circuitry configured to:
receive a read request for data from a first partition of the plurality of partitions;read the history data from the at least one register responsive to a determination that the data is not stored in the first partition of the plurality of partitions; andinitiate a speculative read of the data from a second memory dependent upon the history data.