IO Fabric Frequency Adjustment for Traffic-Aware Power Savings
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Solution Overview
Problem
Cloud-based server systems face inefficiencies due to maintaining high IO fabric frequencies even during low utilization, leading to excessive power consumption and potential processing delays, while transitioning to lower power states can cause unacceptable delays during traffic bursts.
Innovation Solution
Implementing an IO interface stack with traffic detection circuits that adjust IO fabric frequency based on detected traffic levels, allowing for dynamic frequency adjustments without full power state changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high IO fabric frequency is maintained during low utilization, then IO responsiveness is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic frequency adjustment of the IO fabric based on detected traffic levels. The frequency is adjusted from a high initial state to a lower operational state based on actual traffic conditions, resolving the contradiction between maintaining high speed and reducing power consumption during low utilization periods
Solution Approach 2:
The patent changes the operating frequency parameter of the IO fabric dynamically based on traffic detection. By adjusting this key parameter according to actual workload conditions, the system achieves both power savings and maintained responsiveness when needed
2Use of energy by moving object
If IO fabric transitions to lower power state, then power consumption is reduced, but processing delays increase
Solution Approach 1:
The patent performs preliminary frequency adjustment based on detected traffic levels before full power state transitions are needed. By proactively adjusting frequency in response to traffic patterns, the system avoids the delays associated with deeper power state transitions while still achieving power savings
Solution Approach 2:
The patent implements a feedback mechanism where traffic detection results drive frequency adjustment decisions. This closed-loop control ensures the IO fabric operates at appropriate frequency levels based on actual demand, preventing both excessive power consumption and unnecessary processing delays
3Loss of energy
If traffic detection and frequency adjustment is implemented, then power efficiency is improved, but device complexity increases
Solution Approach 1:
The patent applies traffic detection and frequency adjustment specifically to the IO fabric interface circuitry where it is most needed, rather than implementing system-wide complexity. This localized approach achieves power efficiency improvements with minimal additional device complexity
Data Source
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AI summary
In some embodiments, traffic detection circuits are provided to increase an IO fabric frequency when increased IO device traffic is detected.