Dynamic Current Modeling at the Instruction Level

Jose Rizo-Morente, M. Casas-Sanchez, C. Bleakley
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引用次数: 1

Abstract

Estimation of processor current consumption is important for the design of low power systems. This paper proposes a novel method for estimating the dynamic current consumption of a processor. The method models dynamic current as the output of a linear system excited by a signal comprised of the total current due to each instruction. System identification is performed by cross-correlation of a pseudo-random stimulus with the measured current. The method was applied to the Texas Instruments TMS320VC5510 DSP and was found to provide an average correlation of 93% between estimated and measured dynamic current across a range of benchmarks
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指令级的动态电流建模
处理器电流消耗的估算对于低功耗系统的设计具有重要意义。本文提出了一种估计处理器动态电流消耗的新方法。该方法将动态电流建模为由每条指令产生的总电流组成的信号所激励的线性系统的输出。系统辨识是通过伪随机刺激与被测电流的互相关来完成的。该方法应用于德州仪器TMS320VC5510 DSP,发现在一系列基准测试中,估计和测量的动态电流之间的平均相关性为93%
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