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METHOD OF AND APPARATUS FOR DYNAMIC GRAPHICS POWER GATING FOR BATTERY LIFE OPTIMIZATION

  • US 20120169747A1
  • Filed: 12/28/2011
  • Published: 07/05/2012
  • Est. Priority Date: 12/28/2011
  • Status: Active Grant
First Claim
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1. A method comprising:

  • executing a workload on a graphics (GFX) core in a first mode the GFX core comprising a plurality of Subslices wherein each of the plurality of Subslices receives power;

    calculating a number of clock cycles, Tfirst mode, required for the GFX core to perform the workload in the first mode during a first decision window comprising a plurality of clock cycles;

    calculating a number of clock cycles, Tsecond mode, required for the GFX core to perform the workload in a second mode during the first decision window wherein the second mode comprises executing the workload with fewer of the plurality of Subslices receiving power than when executing the workload in the first mode;

    determining if the GFX core operated in a power down state during the first decision window;

    determining, based in part upon Tfirst mode and Tsecond mode, if an energy savings is possible by transitioning the GFX core to the second mode if it is determined that the GFX core operated in a power down state during the first decision window; and

    transitioning the GFX core to the second mode if it is determined that an energy savings is possible by transitioning the GFX core to the second mode.

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