Prefetching to retrieve content from a memory system

Abstract

There are provided apparatuses, methods, systems, chip-containing products and computer-readable storage media. Prefetching retrieves content from a memory system. History storage stores plural entries, each identifying a basic block of memory addresses, wherein the basic block of memory addresses is a contiguous range of memory addresses from which content has been requested to be retrieved from the memory system. An entry order of the plural entries corresponds to a basic block order in which corresponding basic blocks have been requested to be retrieved from the memory system. An entry-order-older basic block is associated with with an entry-order-younger basic block for which respective entries are stored in the history storage circuitry, these basic blocks being separated by at least a defined minimum number of entries in entry order in the history storage. A sequence of request addresses from which content is requested to be retrieved from the memory system is monitored. When a requested address corresponds to the entry-order-older basic block prefetching corresponding to the entry-order-younger basic block is triggered.