US Patent 12135649 System for prefetching data into a cache

In one aspect, a delta prefetcher disclosed herein bases its predictions on both past memory accesses and predictively prefetched memory accesses. More specifically, the delta prefetcher disclosed herein bases its prediction on both the difference or “delta” between memory addresses of data previously fetched from memory and the difference or “delta” between addresses of data predictively fetched from memory. The delta prefetcher tracks the delta memory accesses by utilizing two distinctive tables. The fetch table tracks the memory deltas for each memory operation, such as a LOAD or STORE instruction, that the CPU has executed. The delta table predicts the next memory address to prefetch based on the last prefetched memory accesses.