Temperature-to-Power Mapping for Smartphones

When power consumption in smartphones becomes much higher, several significant impacts occur due to its small form factor, such as performance degradation and worse user experience. Thus, power estimation/mapping is essential and useful for dynamic power management and power model validation for smartphones. In this work, first, we build the power-to-temperature (P-to-T) equations for thermal sensors from the existing system-level thermal model and calibrate them using the least squares fitting. Furthermore, we develop an efficient method for the temperature-to-power (T-to-P) mapping, which obtains the power consumption of components by utilizing temperatures of thermal sensors. Experiments show that this work can estimate power profile efficiently for both steady-state and transient results.