Pulse-Modulated Throttle Control for IC Power Limits
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Solution Overview
Problem
New generations of integrated circuits (ICs) impose increasing demands on power control circuits, leading to thermal issues and performance loss due to excessive current consumption, which existing methods like clock frequency limiting and lower voltage modes cannot effectively address without compromising performance or causing latency.
Innovation Solution
The implementation of a limits management circuit that converts multi-bit overage signals into single-bit throttle signals through pulse modulation, modifying internal processing to control power consumption and prevent thermal runaway, while incorporating randomization to prevent resource starvation in multi-threaded processors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If clock frequency is limited to reduce power consumption, then power consumption is reduced, but processing performance deteriorates with unacceptable latency
Solution Approach 1:
The system dynamically adjusts processing performance through runtime throttling based on thermal and power conditions. The throttling mechanism modifies scheduler behavior adaptively, allowing the system to optimize between power consumption and processing performance in real-time based on actual operating conditions rather than using static frequency limits.
Solution Approach 2:
The system changes operational parameters by modifying scheduler behavior through throttling signals. Instead of changing clock frequency directly, the system alters the scheduling parameters and processor behavior through software-controlled throttling, achieving power reduction while maintaining flexibility in performance adjustment.
2Use of energy by moving object
If lower voltage modes are used to reduce power consumption, then power consumption is reduced, but processing performance deteriorates with unacceptable latency
Solution Approach 1:
The system uses dynamic voltage and performance scaling through runtime throttling. Rather than operating at fixed lower voltage modes, the system dynamically adjusts processor performance based on thermal conditions and power availability, allowing it to maintain higher performance when conditions permit while reducing power consumption when needed.
Solution Approach 2:
The system implements feedback control through thermal sensors and power management circuits that monitor operating conditions and adjust throttling behavior accordingly. This closed-loop feedback mechanism allows the system to optimize power consumption while maintaining performance within acceptable bounds based on real-time conditions.
3Measurement precision
If multi-bit overage signals are used to represent current consumption levels, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The system extracts only the essential information from multi-bit overage signals by converting them to single-bit throttle signals. This extraction process removes unnecessary signal complexity while retaining the critical power management information needed for throttling decisions, effectively separating the measurement function from the control function.
Solution Approach 2:
The pulse modulation circuit acts as an intermediary that translates detailed multi-bit current consumption information into simplified single-bit throttle commands. This intermediary component bridges the gap between precise measurement and simple control, allowing high-precision sensing without requiring complex signal processing throughout the system.
Data Source
AI summary
Systems and methods for power control based on performance modification through pulse modulation include an integrated circuit (IC) that may evaluate certain limit conditions within a computing device and compare the limit conditions to corresponding predefined thresholds. When a given predefined threshold is exceeded, an overage signal may be sent to a limits management circuit within the initial IC or another IC. The limits management circuit may generate a single-bit throttle signal through a pulse modulation circuit. The single-bit throttle signal may modify internal processing of an associated processor, which in turn changes power consumption.