Patent ID: 7721123
Filing Date: 2010-05-18
Classification: G06F,Y02D

Abstract:
1. Apparatus for entering into a low power mode in between snoops, comprising: a component of a data processing system having an associated control unit, the control unit operable to: transition said component to an inactive state; transition said component to a non-snoopable low power mode; receive a snoop request from a sender, wherein the snoop request requires the component; while the component is in the non-snoopable low power mode, respond to the received snoop request by sending a snoop request retry to the sender, wherein the snoop request retry informs the sender to retry the snoop request; bring said component to a snoopable mode; and transition said component back to a non-snoopable low power mode after said snoop request has been at least partially satisfied, thereby allowing the component to enter into a low power mode between snoops.