Processor Efficiency Control via Energy Cost Analysis
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Solution Overview
Problem
Existing processor performance control methods increase power consumption and thermal load, reducing battery life and system efficiency, as they often result in higher performance levels that are not efficiently executed, leading to unnecessary energy expenditure.
Innovation Solution
Implementing efficiency control logic that continuously analyzes processor operations to limit performance to efficient levels by determining energy cost per instruction, computing efficiency control errors, and adjusting performance control efforts to reduce power consumption, thereby limiting processor performance to only what can be executed efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If processor performance is increased to meet computational demands, then processing speed and capability are improved, but power consumption and thermal load increase significantly
Solution Approach 1:
The system dynamically changes operational parameters (frequency, voltage) based on efficiency analysis. The efficiency controller monitors energy cost per instruction and adjusts performance parameters in real-time, transitioning the processor between high-performance and power-efficient states depending on workload characteristics
Solution Approach 2:
The system implements dynamic performance control where the processor operates in multiple performance states rather than a fixed state. The efficiency controller continuously adapts the performance level by adjusting frequency and voltage dynamically based on real-time efficiency metrics, making the system flexible and responsive to changing conditions
2Productivity
If processor frequency and voltage are increased for high computational loads, then processing capability is improved, but system efficiency deteriorates
Solution Approach 1:
The efficiency controller implements a feedback mechanism that continuously monitors energy cost per instruction and uses this information to regulate processor performance. The system measures actual efficiency metrics and adjusts frequency/voltage settings based on whether the workload is being executed efficiently, creating a closed-loop control system that optimizes energy usage
Solution Approach 2:
The system performs self-analysis of its own efficiency characteristics through the efficiency controller, which autonomously evaluates energy cost per instruction and makes independent decisions about performance adjustment without requiring external intervention, enabling the processor to self-optimize its operational state
3Adaptability or versatility
If performance control logic dynamically adjusts voltage and frequency, then processing adaptability is improved, but energy consumption increases due to unnecessary high performance states
Solution Approach 1:
The efficiency controller applies partial performance adjustment by analyzing whether high performance states are actually needed for the current workload. Instead of always maintaining high performance readiness, the system applies performance boosts only when efficiency analysis indicates they are necessary, avoiding excessive energy consumption from unnecessary high-performance operation
Data Source
AI summary
Embodiments provide for a computer implemented method comprising sampling one or more power and performance metrics of a processor; determining an energy cost per instruction based on the one or more power and performance metrics; determining an efficiency metric based on the energy cost per instruction; computing an efficiency control error based on a difference between a current efficiency metric and a target efficiency metric; setting an efficiency control effort based on the efficiency control error; determining a performance control effort, the performance control effort determined by a performance controller for the processor; and adjusting the performance control effort based on the efficiency control effort, wherein adjusting the performance control effort reduces power consumption of the processor.