Processor Power Controller Dynamic Frequency Management
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Solution Overview
Problem
The increasing power requirements and energy consumption of multicore processors pose a significant challenge for energy efficiency in computing systems, contributing to substantial electricity usage across various devices, necessitating innovative power management solutions.
Innovation Solution
The implementation of integrated voltage regulators (IVRs) and a power control unit (PCU) within multicore processors allows for fine-grained control of voltage and power, enabling independent operation of each core and dynamic frequency adjustments through hardware-based power management techniques like dynamic voltage frequency scaling (DVFS) and workload swapping between cores.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the amount of logic on integrated circuit devices is increased to improve processing capability, then productivity is improved, but use of energy increases
Solution Approach 1:
The processor is divided into multiple independent cores, each capable of executing instructions independently. This segmentation allows the system to improve overall processing capability by utilizing multiple cores simultaneously while managing power consumption at the individual core level, thereby addressing the contradiction between productivity and energy use.
Solution Approach 2:
The processor implements dynamic frequency scaling and voltage adjustment for each core based on workload demands. When full processing capability is not needed, cores can operate at lower frequencies and voltages, reducing energy consumption while maintaining the ability to scale up productivity when required.
2Use of energy by moving object
If dynamic frequency adjustments are implemented to improve energy efficiency, then use of energy is improved, but device complexity increases
Solution Approach 1:
The processor includes self-managing control logic that automatically monitors workload, thermal conditions, and power consumption to dynamically adjust core frequencies and voltages without external intervention. This self-service mechanism handles the complexity internally while presenting a simplified interface to the system, resolving the contradiction between energy efficiency and device complexity.
Data Source
AI summary
In one embodiment, a processor includes one or more cores to execute instructions and a power controller coupled to the one or more cores. In turn, the power controller includes a control logic to receive an indication, from one or more sources, of a dynamic change to a guaranteed frequency at which at least one of the one or more cores are to operate, and to determine a final guaranteed frequency at which the processor is to operate for a next window, and to communicate the final guaranteed frequency to at least one entity. Other embodiments are described and claimed.