Power Management for Main Memory With Access Latency Control
Main memory, as an essential component of modern computer systems, has increased its power consumption significantly over the last 10 to 20 years. Energy consumed by memory can account for as much as 40% of an entire computer system. To address this challenge, major memory manufactures have developed memory chips with multiple power states. Putting memory chips into low power modes when they are not (or less frequently) being used is an effective way to save power. As a tradeoff, the time the chip needs to respond to an access may increase.