Dead-block prediction & dead-block correlating prefetchers 论文

详细信息

发表日期

2001-01-01

发表年份

2001

摘要

Effective data prefetching requires accurate mechanisms to predict both “which” cache blocks to prefetch and “when” to prefetch them. This paper proposes the Dead-Block Predictors (DBPs), trace-based predictors that accurately identify “when” an Ll data cache block becomes evictable or “dead”. Predicting a dead block significantly enhances prefetching lookahead and opportunity, and enables placing data directly into Ll, obviating the need for auxiliary prefetch buffers. This paper also proposes Dead-Block Correlating Prefetchers (DBCPs), that use address correlation to predict “which” subsequent block to prefetch when a block becomes evictable. A DBCP enables effective data prefetching in a wide spectrum of pointer-intensive, integer, and floating-point applications.