Hybrid Cache Architecture Replacing SRAM Cache with Future Memory Technology

Recently, hybrid cache architecture has become illuminated. As heterogeneous memory dies are stacked, it improves the performance of microprocessor enhanced in terms of power consumption and processing speed. This paper analyzed the hybrid cache architecture using different programs and memory types. SRAM is fixed for L1 cache memory, whereas DRAM, MRAM, and PRAM are the candidates for L2 cache memory. Each memory structure has the area satisfying the least Average Memory Access Time (AMAT) under a given area condition. Architecture composed of SRAM and MRAM shows 16.9% reduction in average memory access time and 15.2% of power reduction compared with that composed of homogeneous SRAM. Structure of SRAM and DRAM represents 33.0% reduction in power consumption, and that of SRAM and PRAM shows a potential to reduce area and power consumption due to their high density.