Processor Power Management via Dynamic Frequency Scaling
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Solution Overview
Problem
Electronic systems often face a trade-off between reducing power consumption and maintaining performance levels, as they are typically configured for worst-case workload requirements, leading to unnecessary power wastage when workload demands are low.
Innovation Solution
A dynamic power control method that adjusts the processor's clock frequency and supply voltage based on real-time workload assessment, switching between different power control strategies to optimize power consumption while ensuring timely task completion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the processor is configured for worst-case workload requirements with high clock frequency, then performance level is improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts the clock frequency of the processor based on real-time workload monitoring. The frequency is increased when workload exceeds a high threshold and decreased when workload falls below a low threshold, allowing the processor to adapt its performance to actual demands rather than operating at fixed worst-case settings
Solution Approach 2:
The invention changes the operational parameters (clock frequency and supply voltage) of the processor based on workload conditions. By monitoring workload metrics and adjusting frequency and voltage levels accordingly, the system optimizes the balance between performance and power consumption
2Reliability
If the processor operates at high clock frequency to meet potential workload spikes, then task completion capability is improved, but power is wasted during low workload periods
Solution Approach 1:
The system implements a feedback mechanism that continuously monitors workload conditions and adjusts clock frequency in response. The workload monitor provides feedback about current task demands, and the frequency adjuster responds by setting appropriate frequency levels, ensuring the processor operates at optimal performance only when needed
Solution Approach 2:
The system prepares for potential workload spikes by maintaining the capability to quickly increase frequency, but only actually increases frequency when workload thresholds indicate genuine demand. This avoids premature frequency increases while ensuring readiness when needed
Data Source
AI summary
A method comprises operating a processor at a first power control strategy. Such a method further comprises determining whether a workload of a task running on a processor has fallen below a lower threshold, and changing to a second power control strategy to operate the processor based on determining that the workload of the task has fallen below the lower threshold.