Wavelet Analysis for Microprocessor Design: Experiences with Wavelet-Based dI/dt Characterization

As microprocessors become increasingly complex, the techniques used to analyze and predict their behavior must become increasingly rigorous. This paper applies wavelet analysis techniques to the problem of dI/dt estimation and control in modern microprocessors. While prior work has considered Bayesian phase analysis, Markov analysis, and other techniques to characterize hardware and software behavior, we know of no prior work using wavelets for characterizing computer systems. The dI/dt problem has been increasingly vexing in recent years, because of aggressive drops in supply voltage and increasingly large relative fluctuations in CPU current dissipation. Because the dI/dt problem has a natural frequency dependence (it is worst in the mid-frequency range of roughly 50-200MHz) it is natural to apply frequency-oriented techniques like wavelets to understand it. Our work proposes (i) an off-line wavelet-based estimation technique that can accurately predict a benchmark's likelihood...

• Type: Conference
• Year: 2004
• Where: HPCA
• Authors: Russ Joseph, Zhigang Hu, Margaret Martonosi
• Keywords: Computer Architecture, HPCA 2004, Off-line Estimation Technique, Wavelet-based Control Technique, Wavelet-based Estimation Technique