Memory Intensive Computing

Over the past years, new memory technologies such as RRAM, STT-MRAM, and PCM have emerged. These technologies employ devices located within the metal layers of the chip, which are relatively fast, dense, and power efficient and can be considered as 'memristors'. To date, research in these devices has primarily focused on memristors as flash, DRAM, and SRAM replacement. In this presentation, we present these emerging memory technologies as enablers to the era of memoryintensive computing, which brings interesting opportunities for novel architectural applications. As an example, we present the multistate pipeline register (MPR), a structure that stores the microarchitectural state of multiple threads. We show that MPR can eliminate the need to flush the pipeline upon a thread switch in Switch-on-Event (SoE) multi-threading machines. We call the new microarchitectural scheme, Continuous Flow MultiThreading (CFMT), and compare the performance and power consumption against traditional SoE machines. Memristor-based CFMT exhibits an average performance improvement of 40%, while reducing power consumption by 6.5%, significantly increasing the performance to energy ratio.