Clock Signal Modulation for Processor Power Management
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Solution Overview
Problem
In computer processors, adjusting clock signals to reduce power consumption can be inefficient due to the energy requirements of control circuitry and may result in delays and errors during transitions, especially in processors with multiple components.
Innovation Solution
A global clock signal is used, with a counter adjusting the clock rate based on component activity, generating a modulated clock signal only when necessary to conserve power without incurring significant control circuitry load, thus avoiding component pauses and associated delays or errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional clock rate adjustment methods are used to reduce power consumption, then power savings are achieved, but control circuitry energy requirements increase and transition delays occur
Solution Approach 1:
The system uses the existing global clock signal and component activity counters to self-regulate power consumption without requiring separate control circuitry. The counter naturally tracks component activity, and the clock signal is automatically modulated based on counter values, eliminating the need for additional power management hardware.
Solution Approach 2:
The global clock signal serves multiple functions: it drives component operation, enables power management through modulation, and provides timing for counter operations. This multi-functionality eliminates the need for dedicated control circuitry specifically for power management, reducing overall device complexity.
2Loss of energy
If traditional clock rate adjustment methods are used, then power consumption is reduced, but component pauses and transition delays occur
Solution Approach 1:
The system uses periodic sampling of component activity through the counter and applies periodic modulation to the clock signal based on these samples. This periodic action allows smooth transitions between active and low-power states without requiring component pauses, as the clock signal continuously adjusts based on current activity levels.
Solution Approach 2:
The counter provides continuous feedback on component activity levels, which is used to dynamically adjust the clock signal modulation. This feedback mechanism ensures that clock rate changes are made only when necessary and in a controlled manner, avoiding transition delays and maintaining component operation continuity.
3Loss of energy
If a global clock signal is modulated based on counter values, then power consumption is reduced without significant control circuitry load, but clock signal stability may be affected
Solution Approach 1:
The system changes the frequency parameter of the global clock signal based on counter values that reflect component activity. By modulating only the frequency parameter while maintaining the clock signal's other characteristics, the system achieves power savings while preserving clock signal stability for proper component operation.
Solution Approach 2:
The clock signal frequency is dynamically adjusted based on real-time counter values that reflect current component activity. This dynamic modulation allows the system to adapt to changing workload conditions while maintaining stable clock operation during each active state, balancing power efficiency with signal stability.
Data Source
AI summary
In an embodiment, a processor for clock signal modulation includes a clock source to generate a global clock signal, at least one processor component, a counter, and a circuit. The circuit is to: adjust the counter based on a level of activity of the at least one processor component; modulate, based on a value of the counter, the global clock signal to generate a modulated clock signal; and provide the modulated clock signal to the at least one processor component. Other embodiments are described and claimed.