Title :
An ILP formulation for system level throughput and power optimization in multiprocessor SoC architectures
Author :
Srinivasan, Krishnan ; Chatha, Karam S.
Author_Institution :
Dept. of Comput. Sci. & Eng., Arizona State Univ., Tempe, AZ, USA
Abstract :
System-level low power scheduling techniques are required for optimizing the performance and power of embedded applications that are mapped to multiprocessor System-on-Chip (SoC) architectures. In this paper, we present an integer linear programming (ILP) formulation that combines loop transformations (pipelining and unrolling) and system-level low power optimization techniques (dynamic voltage scaling (DVS) and power management (DPM)) to minimize the power consumption, while satisfying the period and deadline constraints of the application. We also present three modifications that relax one or more constraints in the optimal formulation in order to obtain smaller run times. We present experimental analysis by applying the formulations on an MPEG decoder algorithm. All results are compared against two existing techniques. Our formulations result in large system-level power reductions (max: 48.2%, min: 15.92%, avg: 31.9%). The modified ILP formulations result in exponential decrease in runtimes, and a corresponding linear degradation in the result quality.
Keywords :
decoding; integer programming; linear programming; pipeline processing; processor scheduling; system-on-chip; MPEG decoder algorithm; dynamic power management; dynamic voltage scaling; integer linear programming; loop transformations; multiprocessor SoC architectures; pipelining; power consumption; power optimization; system level low power scheduling; system on chip; unrolling; Constraint optimization; Dynamic voltage scaling; Energy consumption; Energy management; Integer linear programming; Multiprocessing systems; Pipeline processing; Power system management; Throughput; Voltage control;
Conference_Titel :
VLSI Design, 2004. Proceedings. 17th International Conference on
Print_ISBN :
0-7695-2072-3
DOI :
10.1109/ICVD.2004.1260933