Retimer Host-Interactive Data Logging Engine
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Solution Overview
Problem
Existing retimer technologies face challenges in efficiently logging mission-mode data in real-time without compromising peak data throughput or overloading critical control circuitry, especially when dealing with high-bandwidth data interfaces.
Innovation Solution
The integration of a data-logging retimer that selectively logs information corresponding to mission-mode data using a logging control storage exposed to an external host component via a low-bandwidth interface, allowing for flexible logging configurations and modes, including selective logging of aggregated-lane data links, segments, and directions, as well as overflow management in a fixed-capacity logging buffer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If real-time logging of mission-mode data is implemented, then measurement precision and information capture are improved, but device complexity and control circuitry load increase
Solution Approach 1:
The patent segments the logging control functionality into a separate host-component interface, dividing the retimer into mission-mode data path and logging control path. This allows the main control circuitry to remain simple while logging precision is improved through host-managed control vectors that selectively enable logging of specific events and conditions without requiring complex integrated logging logic.
Solution Approach 2:
The patent introduces a host component as an intermediary that manages logging control storage and generates logging control vectors. This mediator handles the complexity of logging configuration and decision-making externally, allowing the retimer to maintain simple control circuitry while achieving precise selective logging through host-provided control parameters.
2Adaptability or versatility
If selective logging of multiple data links and segments is enabled, then adaptability and logging flexibility are improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic logging flexibility through host-configurable logging control vectors that can be modified at runtime. The logging behavior adapts to different scenarios (single link, aggregated links, bidirectional, unidirectional) through software-controlled parameters rather than hardwired complex circuitry, allowing versatility without proportional increases in hardware complexity.
Solution Approach 2:
The patent uses parameter-based control where logging behavior is determined by configurable parameters in the logging control storage (such as link identifiers, direction flags, event types). By changing these parameters through the host interface, the system achieves multiple logging configurations and adaptability without requiring complex control circuitry for each possible configuration.
3Ease of operation
If logging control storage is exposed via low-bandwidth interface, then ease of operation and configurability are improved, but productivity and real-time logging capability are worsened
Solution Approach 1:
The patent applies preliminary action by having the host component configure logging parameters and control vectors before actual logging operations begin. The low-bandwidth interface is used for initial configuration and control, while the actual high-speed logging of mission-mode data occurs independently through the main data path, thus maintaining real-time logging capability despite the limited control interface bandwidth.
Solution Approach 2:
The patent separates the control dimension from the data dimension by using the low-bandwidth interface for logging control and configuration (control dimension) while maintaining high-speed independent logging operations (data dimension). This dimensional separation allows easy configurability through the simple interface without compromising real-time logging throughput, as the two operations occur in different functional dimensions.
4Device complexity
If fixed-capacity logging buffer with overflow management is implemented, then device complexity is reduced, but loss of information increases
Solution Approach 1:
The patent implements feedback through host-monitored logging status that tracks buffer fill levels and overflow conditions. The host receives feedback about logging operations and can adjust logging control vectors to prevent overflow or manage buffer usage, reducing information loss while maintaining simple fixed-capacity buffer management without requiring complex dynamic buffer allocation circuitry.
Data Source
AI summary
An integrated-circuit retimer selectively logs information corresponding to mission-mode data, received and transmitted via counterpart high-bandwidth data interfaces, in real-time and accordance with contents of a logging control storage written by an external component during retimer run time.