Embedded Controller Memory Error Tracking
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Solution Overview
Problem
Modern semiconductor memory systems face frequent memory errors due to shrinking storage cell sizes, leading to inadequate monitoring and reporting of memory degradation, which hampers timely corrective action and system reliability.
Innovation Solution
An embedded micro-controller with local memory is integrated within the processor to frequently access and record memory reliability information, including error data, supply voltages, and temperatures, allowing for low-threshold interrupts and high-frequency polling without disrupting processor operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional memory error monitoring is used, then system simplicity is maintained, but memory error detection precision and timeliness deteriorate
Solution Approach 1:
An embedded controller is introduced as an intermediary component between the memory subsystem and the main processor. This controller专门 handles memory error monitoring, polling, and logging tasks, allowing the main processor to focus on computational tasks while achieving high-precision error detection through dedicated monitoring hardware.
Solution Approach 2:
The monitoring function is segmented into a separate embedded controller module with its own local memory and processing capabilities. This segmentation allows independent optimization of error detection precision without increasing overall system complexity, as the monitoring subsystem operates autonomously from the main processor.
2Speed
If high-frequency polling is implemented, then memory error monitoring timeliness is improved, but processor performance deteriorates
Solution Approach 1:
The embedded controller acts as an intermediary that performs high-frequency polling of memory error status independently. It only interrupts the main processor when actual errors are detected or at scheduled log points, thereby achieving fast error monitoring without continuously burdening the processor and maintaining high processor productivity.
Solution Approach 2:
The system implements periodic polling at optimized intervals rather than continuous monitoring. The embedded controller can adjust polling frequency dynamically, performing high-frequency checks during critical periods and lower-frequency checks during normal operation, thus balancing monitoring speed with processor performance requirements.
3Loss of information
If detailed error information is recorded, then reliability analysis capability is improved, but memory usage increases
Solution Approach 1:
The embedded controller includes local memory specifically dedicated to storing error information. This local storage capability allows detailed error logs to be maintained without consuming general system memory resources. The error information is stored in a structured format optimized for reliability analysis, achieving complete error tracking with minimal impact on overall memory availability.
4Measurement precision
If low-threshold interrupts are enabled, then error detection sensitivity is improved, but system interrupt frequency increases
Solution Approach 1:
The embedded controller serves as an intermediary that filters and manages interrupt generation. It can monitor memory errors with high sensitivity using low thresholds but intelligently manages interrupt forwarding to the main processor, batching non-critical errors and only interrupting for significant issues, thus maintaining detection sensitivity while preserving system operational efficiency.
Data Source
AI summary
An apparatus is described. The apparatus includes a processor. The processor includes a memory controller to read and write from a memory. The memory controller includes error correction coding (ECC) circuitry to correct errors in data read from the memory. The processor includes register space to track read data error information. The processor includes an embedded controller. The processor includes local memory coupled to the embedded controller. The embedded controller is to read the read data error information and store the read data error information in the local memory.