Predictive Memory Controller Context Interface
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Solution Overview
Problem
Computing systems face operational inefficiencies due to architectural limitations, particularly in data retrieval latency, caused by slower communication between sub-systems and differences in operational timing, data buses, and communication distance.
Innovation Solution
Implementing a hierarchical memory system with predictive memory controllers that analyze historical data access patterns and transaction contexts to optimize data storage across multiple memory levels, including caches and buffers, and communicating context information between processing and memory sub-systems to improve data retrieval efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If data is stored in lower memory levels (caches and buffers), then data retrieval speed is improved, but memory capacity is reduced
Solution Approach 1:
The memory system is segmented into multiple hierarchical levels (lower memory levels including caches and buffers, and higher memory levels including main memory and storage devices). Each level serves specific functions with different capacity-speed tradeoffs, allowing the system to achieve fast data retrieval for frequently accessed data while maintaining adequate storage capacity across the hierarchy.
Solution Approach 2:
The patent implements a nested hierarchical memory structure where smaller, faster memory components (caches and buffers) are nested within or alongside larger, slower memory components (main memory and storage devices). This nested arrangement allows the system to provide both high-speed access for critical data and large-capacity storage for the entire dataset.
2Loss of time
If communication distance between processing and memory sub-systems is reduced, then data retrieval latency is improved, but system architecture complexity increases
Solution Approach 1:
The system architecture is segmented into processing sub-system and memory sub-system as distinct functional units. This segmentation allows each subsystem to be optimized independently while maintaining clear communication interfaces, reducing the complexity of coordinating numerous components while still achieving reduced latency through targeted optimizations in the memory hierarchy.
Solution Approach 2:
The patent addresses the latency-complexity tradeoff by adding a hierarchical dimension to the memory architecture rather than simply reducing physical distance. By organizing memory into multiple levels with different access speeds and capacities, the system achieves reduced effective latency for frequently accessed data without requiring a completely restructured physical layout, thus avoiding excessive architectural complexity.
3Productivity
If operational timing between processing and memory sub-systems is synchronized, then data retrieval efficiency is improved, but control complexity increases
Solution Approach 1:
The memory controller predicts future data access patterns based on historical access information and proactively pre-loads data into lower memory levels before they are actually requested by the processing subsystem. This preliminary action reduces the need for complex real-time synchronization control, as data is already in position when needed, thereby improving retrieval efficiency while maintaining manageable control complexity.
Solution Approach 2:
The system implements feedback mechanisms where the memory controller continuously monitors and analyzes historical data access patterns from the processing subsystem. This feedback information is used to dynamically adjust data storage and retrieval strategies, optimizing efficiency without requiring complex centralized control, as each memory level adapts its behavior based on observed access patterns.
Data Source
AI summary
Techniques for implementing and/or operating an apparatus, which includes a processing system communicatively coupled to a memory system via a memory bus. The processing system includes processing circuitry, one or more caches, and a memory controller. When a data block targeted by the processing circuitry results in a processor-side miss, the memory controller instructs the processing system to output a memory access request that requests return of the data block at least in part by outputting an access parameter to be used by the memory system to locate the data block in one or more hierarchical memory levels during a first clock cycle and outputting a context parameter indicative of context information associated with current targeting of the data block during a second clock cycle different from the first clock cycle to enable the memory system to predictively control data storage based at least in part on the context information.