상세정보
학술지
Memory Access Scheduling and Binding Considering Energy Minimisation in Multi-Bank Memory Systems: Integrated Approach
- 저자
- 여준기, 김태환
- 발행일
- 200601
- 출처
- IEE Proceedings : Computers and Digital Techniques, v.153 no.1, pp.59-68
- ISSN
- 1350-2387
- 출판사
- IET
- 협약과제
- 06MB1100, 나노소자기반 회로 설계기술 개발, 김종대
- 초록
- Memory-related activity is one of the major sources of energy consumption in embedded systems. Many types of memories used in embedded systems allow multiple operating modes (e.g. active, standby, nap, power-down) to facilitate energy saving. Furthermore, it has been known that the potential energy saving increases when the embedded systems use multiple memory banks in which their operating modes are controlled independently. The authors propose a compiler-directed integrated approach to the problem of maximally utilising the operating modes of multiple memory banks by solving the three important tasks simultaneously: (1) assignment of variables to memory banks, (2) scheduling of memory access operations and (3) determination of operating modes of banks. Specifically, for an instance of tasks 1 and 2, the authors formulate task 3 as a shortest path (SP) problem in a network and solved it optimally. Then, an SP-based heuristic that solves tasks 2 and 3 efficiently in an integrated fashion is developed. Then the proposed approach is extended to address the limited register constraint in the processor. From experiments with a set of benchmark programs, it is confirmed that the proposed approach is able to reduce the energy consumption by 15.76% over that by the conventional approach.
- KSP 제안 키워드
- Embedded system, Energy minimisation, Energy saving, Integrated Approach, Memory System, Memory access scheduling, Multiple operating modes, Power down, energy consumption, memory banks, potential energy