Methods and apparatus for managing and controlling power consumption and heat generation in computer systems
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United States of America Patent
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Feb 25, 2014
Grant Date -
Sep 22, 2011
app pub date -
Jun 1, 2011
filing date -
Apr 5, 2006
priority date (Note) -
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Abstract
A method for reducing power consumption and heat generation in a computer system employs a substitute idle task that puts the processor into a dormant mode, e.g., sleep, nap, or doze mode. The substitute idle task replaces a conventional operating system idle task. The substitute idle task may have a low priority, such as that of the conventional idle task, which it replaces. At each occurrence of a quantum interrupt, a task scheduler schedules applications for execution during the accompanying time slice. After the scheduled applications are done, the substitute idle task is executed. The dormant mode caused by the idle task reduces the system's power consumption. The idle task may also have a high priority and be designed to run for a predetermined percentage of time. As the processor spends the predetermined percentage of time in the dormant mode, known power consumption reduction may be guaranteed in the system.
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