EARLY CACHE PREFETCHING IN PREPARATION FOR EXIT FROM IDLE MODE

摘要

A system includes a functional unit, at least one cache coupled to the functional unit, and a power management unit coupled to the functional unit and the at least one cache, the power management unit configured to trigger the functional unit to initiate prefetching of data to repopulate the at least one cache prior to a predicted exit of the functional unit from an idle mode to an active mode. The system further may include a prediction unit to predict the exit from the idle mode for the functional unit as occurring a predetermined duration from an entry into the idle mode. The prediction unit may determine the predetermined duration based on a history of idle mode durations indicative of durations of previous instances in which the functional unit was in the idle mode.

主权项

1. In a processing device, a method comprising:
predicting an exit from an idle mode for a functional unit; and initiating prefetching of data prior to the predicted exit to repopulate at least one cache coupled to the functional unit.