Architectural Data Mover TLP Hints for Persistent Memory Writes
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Solution Overview
Problem
Information handling systems face inefficiencies in processing and storing data, particularly in optimizing memory transactions to persistent memory, leading to increased latency and data retention issues.
Innovation Solution
An architectural data mover generates a transaction layer packet (TLP) hint for write operations to persistent memory, ensuring automatic flushing and retention-free writes through a logic block that interprets the hint and implements persistent writes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If data is written to persistent memory using conventional memory transactions, then data is stored in memory buffers, but data is cached or retained in memory buffers causing increased latency
Solution Approach 1:
The system performs preliminary actions by generating TLP hints before actual write operations to persistent memory. These hints pre-instruct the memory subsystem to flush buffers and avoid caching, ensuring that subsequent write operations complete immediately without data retention, thereby reducing latency while maintaining data reliability.
Solution Approach 2:
The patent introduces TLP hints as an intermediary mechanism between the processor and persistent memory. These hints act as mediators that convey flushing instructions to the memory subsystem, enabling the system to achieve both low latency and reliable data storage by controlling buffer behavior without requiring direct processor intervention.
2Productivity
If memory buffers are used for data storage, then data processing efficiency is improved, but data is cached or retained in buffers causing latency increases
Solution Approach 1:
The system performs preliminary actions by generating TLP hints before actual write operations to persistent memory. These hints pre-instruct the memory subsystem to flush buffers and avoid caching, ensuring that subsequent write operations complete immediately without data retention, thereby reducing latency while maintaining data reliability.
Solution Approach 2:
The patent applies local quality by differentiating buffer behavior based on the type of memory operation. For persistent memory writes marked with TLP hints, the system configures buffers to flush immediately rather than cache data. This localized adjustment to buffer behavior allows efficient data processing for non-persistent operations while ensuring low-latency writes to persistent memory.
3Productivity
If conventional write operations are used without TLP hints, then device complexity is reduced, but memory transactions lack optimization for persistent memory
Solution Approach 1:
The patent introduces TLP hints as an intermediary mechanism between the processor and persistent memory. These hints act as mediators that convey flushing instructions to the memory subsystem, enabling the system to achieve both low latency and reliable data storage by controlling buffer behavior without requiring direct processor intervention.
Solution Approach 2:
The system implements self-service by enabling the data mover or memory subsystem to autonomously interpret and act on TLP hints. Once hints are generated, the memory subsystem automatically flushes buffers and manages data transmission without requiring additional processor intervention, thereby optimizing memory transactions while maintaining manageable device complexity.
Data Source
AI summary
An information handling system with improved memory transactions includes a data mover configured to generate a transaction layer packet (TLP) hint when a descriptor includes a write operation to a persistent memory. A logic block may perform a persistent write based on the TLP hint.