RFR: An STT-MRAM Cache Management Scheme for Retention Failure Reduction
TimeTuesday, July 12th6pm - 7pm PDT
LocationLevel 2 Lobby
DescriptionThis paper investigates the parameters that affect the retention failure of STT-MRAM cache memory and observes that the duration of dead dirty blocks is the most determinant on the retention failure rate. We then propose a simple yet effective cache replacement policy, called Retention Failure Reduction (RFR), to decrease the length of the dead dirty block intervals, which results in significant retention failure rate reduction. Our evaluations demonstrate that the RFR replacement policy cuts down the probability of retention failure by 16.2% with a negligible performance overhead compared to the conventional Least Recently Used (LRU) replacement policy.