A method for obtaining a measurement of storage usage includes sending a request, by a processor, for the measurement of storage usage during execution of an application by the processor; counting blocks of storage to generate the measurement of storage usage by the application; and providing the measurement of storage usage to the application. Reporting and execution definitions are separated by defining tracking definitions and points that define the data collection requirements of the process. For example, the shift of the threshold voltage of the storage capacitor in the positive direction is suppressed by application of a negative bias to a pixel electrode functioning as the other electrode of the storage capacitor.