Browse Prior Art Database

Direct Thermal Control based on CPU Mode Change

IP.com Disclosure Number: IPCOM000233354D
Publication Date: 2013-Dec-10
Document File: 2 page(s) / 40K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method to automatically cool a central processing unit (CPU) when the system detects that it is in a high performance (i.e., boosted) mode. A faster reaction to an increase in temperature allows the CPU to operate in a boosted mode for a longer period.

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Direct Thermal Control based on CPU Mode Change

Technologies exist that boost processor performance beyond the base clock frequency


(i.e., boosted mode) as long as the Central Processing Unit (CPU) as a whole maintains the thermal power design limits. When the CPU reaches the limits, the cores return to the base frequency. Classic thermal control feedback mechanisms using temperature sensing lag future temperature changes of electronic components. New methods attempt to solve this problem by sensing the power consumption of the component. A more direct way is needed in order to more quickly react to new CPU modes, such as those provided by state-of-the-art technologies, to further exploit the benefits of these technologies.

Prior art regarding Processor States and thermal control is based on lowering the processor performance to maintain temperature within limits.

The method disclosed herein allows raising processor performance while increasing the cooling effectiveness during the time the boosted mode is required. The core idea is to monitoring the CPU high power mode (i.e., boosted mode) in order to provide an early trigger to ramp up cooling to that CPU, thus keeping the boosted mode active longer.

The novel contribution is a method to provide proactive cooling based upon a CPU performance state change, and then direct a one-to-one application of a cooling change to the CPU state change (not an indirect sensing mechanism to cooling application).

In current co...