Cribbing cache implementing highly compressible data indication

Abstract

A memory subsystem includes a flag to indicate high compressibility, which enables a cache controller to selectively avoid access to the data from a memory resource based on an indication of the flag. The main memory device stores data and the auxiliary memory device stores a copy of the data. The cache controller can determine whether the memory location includes highly compressible data and store a flag locally at the cache controller as a representation for high compressibility. The flag is accessible without external input/output (I/O) from the cache controller, and indicates whether the data includes highly compressible data. The flag can optionally indicate a type of highly compressible data. In response to a memory access request for the memory location, the cache controller can return fulfillment of the memory access request according to the representation of high compressibility indicated by the flag.

Dependencies are inferred from the claim text.