Dynamic CPU Clock Frequency Adjustment for Power Management
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Solution Overview
Problem
Existing computing devices face challenges in reducing power consumption, especially in wireless devices, as existing methods require application developers to have intimate knowledge of processor usage patterns and do not account for combined processor demands of multiple applications running simultaneously.
Innovation Solution
A device dynamically adjusts its CPU clock frequency based on the monitored processing load, increasing frequency during high load and decreasing it during low load, without requiring specific intervention from application developers, and can be implemented in a platform-independent manner without changing application code.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the CPU clock frequency is maintained at a high level to ensure processing capability, then processing speed is improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts the CPU clock frequency based on real-time processor load conditions. The operating system monitors CPU utilization and adjusts the clock frequency accordingly - increasing frequency when load is high to maintain processing speed, and decreasing frequency when load is low to reduce power consumption. This dynamic adaptation resolves the contradiction by making the system flexible rather than static.
Solution Approach 2:
The system changes the clock frequency parameter based on processor load conditions. By monitoring CPU utilization and adjusting the frequency parameter in response to changing workload demands, the system optimizes the balance between processing speed and power consumption, resolving the technical contradiction through parameter adaptation.
2Productivity
If application developers specify exact frequency requirements for applications, then processing performance is optimized, but system complexity increases and requires intimate knowledge of processor usage patterns
Solution Approach 1:
The operating system automatically monitors processor load and adjusts clock frequency without requiring application developers to specify frequency requirements. The system serves itself by detecting workload conditions and making appropriate frequency adjustments, eliminating the need for developers to have intimate knowledge of processor usage patterns while maintaining optimized processing performance.
Solution Approach 2:
The system implements a feedback mechanism where the operating system continuously monitors CPU load and uses this information to adjust clock frequency. This closed-loop control allows the system to automatically optimize processing performance based on actual workload conditions without requiring complex pre-specification by developers, resolving the contradiction through automated feedback-driven adjustment.
3Loss of energy
If the CPU clock frequency is reduced to decrease power consumption, then energy efficiency is improved, but processing capability decreases
Solution Approach 1:
The system dynamically adjusts clock frequency based on actual processor load rather than maintaining a fixed low frequency. When processing demand is high, the frequency increases to maintain processing capability; when demand is low, the frequency decreases to improve energy efficiency. This dynamic behavior resolves the contradiction by adapting to real-time conditions rather than operating at a fixed point.
Solution Approach 2:
The operating system periodically monitors processor load and adjusts clock frequency in periodic intervals. This periodic adjustment ensures that the system maintains adequate processing capability when needed while improving energy efficiency during low-load periods, resolving the contradiction through rhythmic adaptation to workload conditions.
Data Source
AI summary
In general, the disclosure is directed to techniques for reducing power consumption within computing devices, such as wireless communication devices. A device dynamically adjusts the CPU clock frequency based on CPU load in order to reduce power consumption. The device monitors the load of the CPU using a number of sample interrupts. The device determines whether to adjust the clock frequency based on the monitored load of the CPU. In general, the device increases the clock frequency when the load of the CPU is high and decreases the clock frequency when the load of the CPU is low.