Energy Exchanges: Internal Power Oversight for Applications

This paper introduces energy exchanges, a set of abstractions that allow applications to help hardware and operating systems manage power and energy consumption. Using annotations, energy exchanges dictate when, where, and how to trade performance or accuracy for power in ways that only an application’s developer can decide. In particular, the abstractions offer audits and budgets which watch and cap the power or energy of some piece of the application. The interface also exposes energy and power usage reports which an application may use to change its behavior. Such information complements existing system-wide energy management by operating systems or hardware, which provide global fairness and protections, but are unaware of the internal dynamics of