Analysis of Power Saving Effect for Dynamic Power Management

Dynamic power management (DPM) is a design methodology for dynamically reconfiguring systems to provide the requested services and performance levels with a minimum number of active components or a minimum load on such components. The principle of DPM selectively shuts down or depresses performance of some components that are idle. Many approaches have been exploited for DPM, different approach leads to different effects of power saving. Former analysis of power saving effect of DPM approach used to use theoretical computation or simulation which are difficult to reflect the real efficiency of power saving of the target DPM approach, this paper presents an analytic approach which could be embedded into the real implementation of DPM architecture to monitor the behavior of DPM approach, record information it needs for analysis, and analyze power saving effect offline, it could also support systems that have multi low power states. Experiment results shows that this analytic approach gets the same results as the simulated results