A cache reconfiguration approach for saving leakage and refresh energy in embedded dram caches

Abstract: In recent years, the size and leakage energy consumption of large last level caches (LLCs) has increased. To address this, embedded DRAM (eDRAM) caches have been considered which have lower leakage energy consumption; however eDRAM caches consume a significant amount of energy in the form of refresh energy. In this paper, we present a technique for saving both leakage and refresh energy in eDRAM caches. We use dynamic cache reconfiguration approach to intelligently turn-off part of the cache to save ...