Allocating power in devices by reserving a static power allocation to be used by one or more predetermined subsystems and reserving a dynamic power allocation to be used when the static power allocation is insufficient

Abstract

Management of power resources of an electronic device are disclosed. The electronic device has multiple subsystems in communication with a power supply, and an interface in communication with the subsystems. A directive is received with the interface to perform a function with the electronic device. A subset of the subsystems needed to perform the function are identified. For each identified subsystem and in response to receipt of the directive, a predicted power-resource quantity needed to perform the function is determined. A determination is made whether sufficient unallocated resources of the power supply are available to accommodate the predicted power-resource quantity for each identified subsystem. Respective portions of the available and unallocated resources of the power supply are accordingly allocated for use by respective identified subsystems in accordance with the determined power-resource quantities, with such allocation rendering the respective portions unavailable for use other than by the respective subsystems.