Hardware Memory Test Unit for Transient Fault Detection
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Solution Overview
Problem
Current data storage devices, such as phase change memory, can experience transient faults that cause processors to shut down, and existing solutions rely on software intervention or operating systems for error recovery, which can be inefficient and unreliable.
Innovation Solution
A hardware memory test unit is integrated into the processor to independently check data storage devices for transient faults before data access, allowing for direct recovery and error clearance without relying on the operating system, using a dedicated communication path and direct memory access to identify and correct errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If software intervention or operating system is used for error recovery, then error handling can be performed, but system efficiency decreases and reliability is compromised due to the inefficiency and unreliability of software-based solutions
Solution Approach 1:
The patent replaces software-based error recovery mechanisms with a hardware memory test unit that directly interfaces with the memory device. This hardware unit autonomously detects and recovers from transient faults through dedicated communication paths, eliminating the need for software intervention and thereby improving both reliability and system efficiency simultaneously
Solution Approach 2:
The memory test unit is designed to autonomously monitor and recover from memory errors without requiring external software control. The unit independently executes test operations, identifies transient faults, and performs recovery actions, enabling the system to self-correct errors before they propagate to the processor or operating system
2Productivity
If a hardware memory test unit is integrated into the processor, then direct error detection and recovery is achieved improving efficiency, but device complexity increases
Solution Approach 1:
The memory test unit is implemented as a separate, dedicated hardware component with its own communication path to the memory device. This segmentation allows the error detection functionality to be isolated from the main processor logic, enabling efficient error handling while maintaining a modular architecture that minimizes overall system complexity
Solution Approach 2:
The hardware memory test unit serves as an intermediary component between the processor and the memory device. It provides a dedicated communication path that allows autonomous error detection and recovery, shielding the main processor from error handling complexities while maintaining efficient data access
Data Source
AI summary
Methods and apparatuses relating to a hardware memory test unit to check a section of a data storage device for a transient fault before the data is stored in and/or loaded from the section of the data storage device are described. In one embodiment, an integrated circuit includes a hardware processor to operate on data in a section of a data storage device, and a memory test unit to check the section of the data storage device for a transient fault before the data is stored in the section of the data storage device, wherein the transient fault is to cause a machine check exception if accessed by the hardware processor.