Optimizing mode transition sequences in idle intervals for component-level and system-level energy minimization

New embedded systems offer rich power management features in the form of multiple operational and non-operational power modes. While they offer mechanisms for better energy efficiency, they also complicate power management decisions in the presence of realtime constraints. Traditional dynamic power management techniques based on localized break-even-time analysis with simple on/off power controls often yield suboptimal if not incorrect results globally. To address these problems, this paper presents two core algorithms for reducing idle energy consumption at the component level and system level. The first algorithm discovers the optimal sequence for mode transition over multiple power modes under timing constraints. It assists the second algorithm that performs a sophisticated global search strategy to aggressively explore system-wide energy savings by correctly interpreting the constraints across all subsystems. Experimental results show that in an embedded radio system where idle ...

• Type: Conference
• Year: 2004
• Where: ICCAD
• Authors: Jinfeng Liu, Pai H. Chou
• Keywords: Active Energy Consumption, Hardware, ICCAD 2004, Idle Energy Consumption, Idle Energy Cost