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System and method for managing power usage of a data processing system subsystem

  • US 7,664,968 B2
  • Filed: 06/09/2005
  • Issued: 02/16/2010
  • Est. Priority Date: 06/09/2005
  • Status: Active Grant
First Claim
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1. A method for managing power usage within a data processing system resource coupled with a power-managed server data processing system via a bus, said method comprising:

  • processing a plurality of access requests associated with said bus;

    determining a processing latency time period associated with a prior access request of said plurality of access requests;

    inhibiting processing of a current access request for a power management delay time period, wherein said power management delay time period is determined utilizing said processing latency time period, and wherein said data processing system resource comprises a data processing system input/output element, and said power management delay time period is determined utilizing an average processing latency time period associated with a predetermined number of access requests of said plurality of access requests preceding said current access request in time;

    causing data specifying a power management level to be stored utilizing a storage element associated with said power-managed server data processing system; and

    inhibiting said processing of said current access request in response to said causing.

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