公开(公告)号：US20170091104A1

公开(公告)日：2017-03-30

申请号：US14870594

申请日：2015-09-30

Applicant: ARM LIMITED

Inventor： Todd RAFACZ ,  Huzefa SANJELIWALA

IPC: G06F12/08

CPC classification number: G06F12/0862 ,  G06F2212/1016 ,  G06F2212/1021 ,  G06F2212/602 ,  G06F2212/6024 ,  G06F2212/6026

Abstract: Prefetch apparatus and a method of prefetching are presented. The prefetch apparatus monitors access requests, each having an access request address, and has request tracking storage to store region entries for regions of memory space which each span multiple access request addresses. The request tracking storage keeps access information for access requests received in their corresponding region entries. When a new region access request is received, which belongs to a new region for which there is no region entry, and when the request tracking storage has an adjacent region entry for which the access information shows that at least a predetermined number of the access request addresses have been accessed, a page mode region prefetching process is initiated for all access request addresses in the new region.

公开(公告)号：US20160328320A1

公开(公告)日：2016-11-10

申请号：US14702972

申请日：2015-05-04

Applicant: ARM LIMITED

Inventor： Miles Robert DOOLEY ,  Todd RAFACZ ,  Guy LARRI

IPC: G06F12/08

CPC classification number: G06F12/0895 ,  G06F12/0864 ,  G06F12/1027 ,  Y02B70/30 ,  Y02D10/13

Abstract: A cache is provided comprising a plurality of ways, each way of the plurality of ways comprising a data array, wherein a data item stored by the cache is stored in the data array of one of the plurality of ways. A way tracker of the cache has a plurality of entries, each entry of the plurality of entries for storing a data item identifier and for storing, in association with the data item identifier, an indication of a selected way of the plurality of ways to indicate that a data item identified by the data item identifier is stored in the selected way. Each entry of the way tracker is further for storing a miss indicator in association with the data item identifier, wherein the miss indicator is set by the cache when a lookup for a data item identified by that data item identifier has resulted in a cache miss. A corresponding method of caching data is also provided.

Abstract translation: 提供包括多个方式的高速缓存，多个方式的每一路包括数据阵列，其中高速缓存存储的数据项被存储在多个方式之一的数据阵列中。 高速缓存的方式跟踪器具有多个条目，多个条目的每个条目用于存储数据项标识符，并且用于与数据项标识符相关联地存储指示多个方式的所选方式的指示 以所选择的方式存储由数据项标识符标识的数据项。 方式跟踪器的每个条目还用于存储与数据项标识符相关联的未命中指示符，其中当由该数据项标识符标识的数据项的查找导致高速缓存未命中时，该高速缓存设置该未命中指示符。 还提供了缓存数据的相应方法。