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1. 发明授权

US08140767B2 Cache management through delayed writeback 有权
标题翻译：缓存管理通过延迟回写
公开(公告)号：US08140767B2
公开(公告)日：2012-03-20
申请号：US12478555
申请日：2009-06-04
申请人： Gordon Bernard Bell , Anil Krishna , Brian Michael Rogers , Ken Van Vu
发明人： Gordon Bernard Bell , Anil Krishna , Brian Michael Rogers , Ken Van Vu
IPC分类号： G06F12/08
CPC分类号： G06F12/121
摘要： The illustrative embodiments provide a method, apparatus, and computer program product for managing a number of cache lines in a cache. In one illustrative embodiment, it is determined whether activity on a memory bus in communication with the cache exceeds a threshold activity level. A least important cache line is located in the cache responsive to a determination that the threshold activity level is exceeded, wherein the least important cache line is located using a cache replacement scheme. It is determined whether the least important cache line is clean responsive to the determination that the threshold activity level is exceeded. The least important cache line is selected for replacement in the cache responsive to a determination that the least important cache line is clean. A clean cache line is located within a subset of the number of cache lines and selecting the clean cache line for replacement responsive to an absence of a determination that the least important cache line is not clean, wherein the each cache line in the subset is examined in ascending order of importance according to the cache replacement scheme.
摘要翻译：说明性实施例提供了用于管理高速缓存中的多条高速缓存行的方法，装置和计算机程序产品。在一个说明性实施例中，确定与高速缓存通信的存储器总线上的活动是否超过阈值活动级别。响应于确定超过了阈值活动级别，至少重要的高速缓存行位于缓存中，其中使用高速缓存替换方案来定位最不重要的高速缓存行。响应于超过阈值活动水平的确定，确定最不重要的高速缓存行是否是干净的。响应于确定最不重要的高速缓存行是干净的，在缓存中选择最不重要的高速缓存行用于替换。干净的高速缓存行位于高速缓存行数量的一个子集内，并且响应于不存在最不重要的高速缓存行不干净的确定而选择用于替换的干净高速缓存行，其中检查子集中的每个高速缓存行按照缓存替换方案的重要性升序排列。

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