US 2024/0176742 A1 · PROVIDING MEMORY REGION PREFETCHING IN PROCESSOR-BASED DEVICES

Abstract

Providing memory region prefetching in processor-based devices is disclosed. In some aspects, a processor-based device comprises a region prefetcher circuit that comprises a plurality of access bitmaps corresponding to a plurality of contiguous memory regions of a system memory device. Each access bitmap comprises a plurality of bits corresponding to a plurality of memory blocks of a contiguous memory region. The region prefetcher circuit detects a memory access request to a memory block of a contiguous memory region, identifies an access bitmap corresponding to the contiguous memory region, and identifies a bit corresponding to the memory block. The region prefetcher circuit sets the bit to indicate the memory access request to the memory block. The region prefetcher circuit subsequently detects a prefetch trigger event, and, in response, identifies one or more unset bits of the access bitmap, and prefetches one or more memory blocks corresponding to the unset bits.

Claims20

Dependent claims

A processor-based device, comprising:

a region prefetcher circuit comprising a plurality of access bitmaps, each corresponding to a contiguous memory region of a plurality of contiguous memory regions of a system memory device;
wherein each access bitmap comprises a plurality of bits, each corresponding to a memory block of a plurality of memory blocks of the contiguous memory region;
and
the region prefetcher circuit configured to:
detect a first memory access request to a first memory block of a first contiguous memory region of the plurality of contiguous memory regions;
identify a first access bitmap corresponding to the first contiguous memory region;
identify a first bit, corresponding to the first memory block, of the plurality of bits of the first access bitmap;
set the first bit to indicate the first memory access request to the first memory block;
detect a prefetch trigger event;
and
responsive to detecting the prefetch trigger event:
identify one or more unset bits of the first access bitmap;
and
prefetch one or more memory blocks, corresponding to the one or more unset bits, of the first contiguous memory region.

11 more elements

A method for performing memory region prefetching, comprising:

detecting, by a region prefetcher circuit of a processor-based device, a first memory access request to a first memory block of a first contiguous memory region of a plurality of contiguous memory regions of a system memory device;
identifying, by the region prefetcher circuit, a first access bitmap, corresponding to the first contiguous memory region, of a plurality of access bitmaps, each corresponding to a contiguous memory region of the plurality of contiguous memory regions;
identifying, by the region prefetcher circuit, a first bit, corresponding to the first memory block, of a plurality of bits of the first access bitmap;
setting, by the region prefetcher circuit, the first bit to indicate the first memory access request to the first memory block;
detecting, by the region prefetcher circuit, a prefetch trigger event;
and
responsive to detecting the prefetch trigger event:
identifying, by the region prefetcher circuit, one or more unset bits of the first access bitmap;
and
prefetching, by the region prefetcher circuit, one or more memory blocks, corresponding to the one or more unset bits, of the first contiguous memory region.

7 more elements

Dependencies are inferred from the claim text.

Providing memory region prefetching in processor-based devices

Life of this patent

Providing memory region prefetching in processor-based devices

Life of this patent

Abstract

Claims20