Even when allocations are appropriately proportional and consistent with actual demand, the ability to spend proportionally depends on policies that control access to resources, such as the schedulers for the CPU, network bandwidth, and disk. In addition, there are interactions between scheduling and allocation since the ability to actually spend currentcy affects future caps in our allocation algorithms. In this section, we explore the role of the CPU scheduler in delivering the opportunity for proportional energy consumption and the role of currentcy in unifying these decisions. The goal is to achieve energy use proportional to the specified currentcy share of each task, unless the task's needs are satisfied at a lower energy consumption.