Pipeline Clock Gating Detection for Power Conservation
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Solution Overview
Problem
Current processor designs face challenges in reducing power consumption, particularly due to excessive power dissipation in multi-core processors, where latch clocking activity is a significant contributor, and existing clock gating techniques may be too pessimistic in identifying opportunities for power reduction.
Innovation Solution
A method and apparatus for simulating the operation of pipeline electronic devices to identify and implement clock-gating opportunities in logic elements across multiple pipeline stages, thereby reducing power consumption by selectively blocking clock signals to latches that do not require them during a particular clock cycle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If manual study and simulation are used to determine clock gating opportunities, then power consumption can be reduced, but the identification is too pessimistic and misses additional opportunities
Solution Approach 1:
The patent replaces manual study and traditional simulation methods with an automated detection system that uses pipeline stage information and downstream logic analysis to identify clock gating opportunities. This automated approach eliminates the pessimistic limitations of manual methods while maintaining accuracy through systematic analysis of pipeline stages and data dependencies.
2Loss of energy
If clock gating is applied to reduce latch clock activity, then power consumption decreases, but determining the optimal timing is a major design challenge
Solution Approach 1:
The patent implements a self-service approach where the detection system automatically analyzes pipeline stage information and downstream logic to generate clock gating opportunities without requiring manual intervention. The system uses the pipeline's own operational characteristics (stage transitions, data dependencies) to automatically determine optimal clock gating timing, eliminating the need for complex manual design processes.
3Temperature
If external cooling devices are added to address high power dissipation, then heat dissipation improves, but cost, noise, and bulk increase
Solution Approach 1:
The patent converts the harmful effect of power dissipation into a beneficial opportunity for optimization. Instead of adding external cooling devices to manage heat, the system analyzes power consumption patterns to identify clock gating opportunities, thereby reducing power dissipation at its source. This approach transforms the cooling problem into a design optimization opportunity.
Data Source
AI summary
A pipeline electronic circuit and design methodology enables power conservation in the stages of the pipeline via a simulation that identifies clock-gating opportunities among the stages of the pipeline. In one embodiment, simulation results assist a designer in the design of the pipeline electronic circuit to achieve power conservation by incorporating clock-gating circuitry among the stages of the pipeline at clock gating opportunity locations that the simulation identifies.