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Power aware adaptive polling

  • US 7,093,141 B2
  • Filed: 12/18/2002
  • Issued: 08/15/2006
  • Est. Priority Date: 12/18/2002
  • Status: Active Grant
First Claim
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1. A method for adapting the periodicity of polling for pending device service requests in a data processing system having a system processor and one or more input/output (I/O) devices, comprising the steps of:

  • polling the I/O devices of the data processing system for pending service requests;

    recording whether there was a pending service request;

    adaptively adjusting one or more system polling variables when there is no pending service request from at least one of the I/O devices;

    based on accumulated data, determining that the I/O devices are idle; and

    in response to said determining step, placing the system processor in a low power state.

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