Filtering drowsy instruction cache to achieve better efficiency

Roberto Giorgi, Paolo Bennati
2008 Proceedings of the 2008 ACM symposium on Applied computing - SAC '08  
Leakage power in cache memories represents a sizable fraction of total power consumption, and many techniques have been proposed to reduce it. As a matter of fact, during a fixed period of time, only a small subset of cache lines is used. Previous techniques put unused lines, for example, to drowsy in order to save power. Our idea is to adaptively select the most used cache lines. In the case of instruction cache, we found that this can automatically achieved by coupling a tiny cache acting as
more » ... filter cache (IL0 cache) with a drowsy-cache. Our experiments, with complete MiBench suite for ARM based processor, show a 25% improvement in leakage saving versus drowsy.
doi:10.1145/1363686.1364050 dblp:conf/sac/GiorgiB08 fatcat:5yqm7p24qbcpjb4ylpszhoqnv4