Method and system for controlling clock frequency for active power management
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United States of America Patent
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Sep 22, 2015
Grant Date -
Jan 26, 2012
app pub date -
May 29, 2009
filing date -
Nov 24, 2008
priority date (Note) -
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Abstract
A method of controlling the clock frequency of a processor executing software in a plurality of active periods, the method comprising, for each period: supplying to a power management application at least one parameter defining an execution profile for the period having high frequency and low frequency operating intervals; the power management application determining, based on said profile, granted clock frequencies for the high and low frequency operating intervals; the processor supplying to the power management application at the commencement of a period an operating cycle requirement for the period; the power management application determining, for each period, based on the operating cycle requirement, the length of the low frequency interval; and controlling the clock frequency in each interval based on the granted clock frequencies determined by the power management application.
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