CPU Power Detector Threshold Adjustment
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Solution Overview
Problem
Current CPU power management systems rely on static circuits with fixed thresholds for maximum power detection, leading to inefficient performance as they cannot adapt to varying power supply capabilities, causing unnecessary throttling and reduced system configurations.
Innovation Solution
A dynamically adjustable system that modifies the voltage at a current sensing element connected to the CPU's maximum power detector, using a digital-to-analog converter (DAC) to prevent premature throttling and allow transient power excursions, enabling the baseboard management controller to manage power based on the power supply unit's capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a static circuit with fixed threshold is used for maximum power detection, then the detection threshold is stable and simple to implement, but the system cannot adapt to varying power supply capabilities, causing unnecessary throttling
Solution Approach 1:
The patent implements a dynamic threshold adjustment mechanism where the maximum power detection threshold is no longer fixed but can be modified based on power supply unit capabilities. The baseboard management controller receives capability information from the power supply unit and adjusts the detection threshold accordingly, allowing the system to adapt between different power supply configurations (e.g., 500W vs 1000W PSUs) and avoid unnecessary CPU throttling when the power supply can handle higher transient demands.
Solution Approach 2:
The patent changes the detection parameter from a fixed threshold value to a dynamically adjustable threshold. By modifying the maximum power detection threshold based on the power supply unit's capability information, the system can optimize performance for different power supply configurations. This parameter change allows the CPU to operate at higher frequencies when paired with capable power supplies while maintaining safety margins with smaller power supplies.
2Reliability
If the maximum power detection threshold is lowered to prevent power exceedance, then power supply safety is improved, but system performance is reduced due to premature throttling
Solution Approach 1:
The patent implements a feedback mechanism where the baseboard management controller continuously monitors the power supply unit's capability information and adjusts the maximum power detection threshold accordingly. This closed-loop feedback allows the system to optimize the threshold setting based on actual power supply capabilities, preventing both premature throttling (when threshold is too low) and power exceedance (when threshold is too high). The feedback loop ensures power supply safety while maximizing system performance.
Solution Approach 2:
The patent performs preliminary configuration by having the baseboard management controller obtain the power supply unit's capability information before CPU operation begins. This preliminary action allows the system to pre-configure the appropriate maximum power detection threshold based on the specific power supply unit installed, ensuring optimal performance from the start without requiring runtime threshold adjustments or performance penalties.
3Power
If the power supply unit size is increased to handle higher power demands, then power capability is improved, but system cost and environmental impact increase
Solution Approach 1:
The patent enables dynamic utilization of power supply capability through software-based threshold adjustment rather than requiring a fixed oversized power supply. By allowing the maximum power detection threshold to be modified based on the power supply unit's actual capabilities, the system can fully utilize the available power headroom without needing to install a larger power supply unit. This dynamic approach extracts maximum performance from the existing power supply infrastructure.
Solution Approach 2:
The patent changes the operational parameters of the power management system to allow higher transient power excursions when paired with capable power supply units. By modifying the detection threshold parameter based on power supply capability information, the system can achieve higher effective power delivery without physically increasing the power supply unit size, thereby avoiding the associated cost and environmental impacts of larger hardware.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances system performance by avoiding unnecessary throttling and allowing acceptable power transients, optimizing power supply efficiency without increasing its size, thus minimizing environmental impact and performance reduction.
Implementation Method 1
using a digital-to-analog converter (DAC) to prevent premature throttling
Data Source
AI summary
A method and apparatus for system control of a central processing unit (CPU) maximum power detector are provided. In accordance with at least one embodiment, a decision is made as to whether a response of a maximum power detector of the CPU is to be altered. When the response is to be altered, a modified input level is provided to the maximum power detector to alter the response. As an example, the modified input level can prevent the maximum power detector from triggering a power throttling function. When the response is not to be altered, an existing input level for the maximum power detector is maintained. In accordance with at least one embodiment, an apparatus or information handling system can comprise a voltage regulator (VR), a current sensor, a CPU comprising a maximum power detector, and a digital to analog converter (DAC).