APPARATUS, METHOD, AND SYSTEM FOR EARLY DEEP SLEEP STATE EXIT OF A PROCESSING ELEMENT

摘要

An apparatus and method is described herein for providing an early wake scheme before spawning a new thread. An early wake indication may be provided an amount of time, which may include an amount of time to perform a demotion from a current power state to a lower power state that is closer to an active power state, before a new thread is to be spawned and executed on a processing element (e.g., core or thread). Upon encountering the spawn of the new thread, such as a helper thread, the processing element may further transition from the lower power state to an active power state. The new thread may be executed on the processing element without incurring the latency associated with execution of the new thread waiting for the demotion from the current power state to an active power state after the spawn of the new thread.

主权项

1. A processor comprising:
a first processing element to execute a first thread to generate an early wake indication; a second processing element to execute a second thread spawned after the early wake indication is generated from the first thread; and power control logic to transition the second processing element from a first power state to a second power state in response to the early wake indication from the first thread and transition the second processing element to an active power state in response to a spawn of the second thread, wherein the first power state and the second power state are lower power consumption states than the active power state.