Memory Data Layout Using Latency-Aware Address Mapping
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Solution Overview
Problem
Memory systems often hide the physical organization of memory allocation from the host system, leading to inefficient memory access due to unknown latency costs across different memory boundaries.
Innovation Solution
A memory manager provides performance records indicating latency for subsets of addresses within the memory space, allowing the host system to sort and store data based on these records, optimizing data layout for efficient memory access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If memory systems hide the physical organization of memory allocation from the host system, then memory management complexity is reduced, but memory access efficiency deteriorates due to unknown latency costs
Solution Approach 1:
The patent introduces performance records as an intermediary mechanism that bridges the host system and memory manager. These records convey latency information about memory boundaries without requiring the memory manager to expose complex physical organization details, thus maintaining simplicity while enabling efficient data layout optimization.
Solution Approach 2:
The memory manager provides feedback to the host system through performance records that indicate latency costs for accessing different memory boundaries. This feedback loop enables the host system to adjust data layout strategies based on actual memory access characteristics, improving efficiency without increasing management complexity.
2Ease of manufacture
If the host system does not know latency costs across memory boundaries, then memory allocation is simplified, but data layout optimization is limited
Solution Approach 1:
The memory manager performs preliminary action by pre-calculating and recording performance information about memory boundaries before the host system needs to optimize data layout. These pre-computed performance records are made available to the host system, enabling optimization without requiring complex real-time analysis.
Solution Approach 2:
Performance records serve as an intermediary that translates complex memory boundary latency information into a format the host system can easily process and use for optimization decisions, maintaining allocation simplicity while enabling sophisticated data layout strategies.
3Speed
If data is stored without considering memory boundary latency, then storage operations are faster, but memory access latency increases due to suboptimal data layout
Solution Approach 1:
The host system performs preliminary sorting and reorganization of data based on performance records before actual memory access operations occur. This preliminary action optimizes data layout in advance, ensuring that frequently accessed data is positioned to minimize future access latency without slowing down storage operations.
Solution Approach 2:
The system dynamically adjusts data layout strategies based on the specific memory access patterns and performance characteristics of different memory boundaries. This dynamic optimization allows the system to adapt data organization to actual usage patterns, reducing access latency without compromising storage speed.
Data Source
AI summary
Methods, systems, and devices for systems for software optimization of data layout are described. A memory manager may indicate an allocation of a memory space and performance records that indicate latency information for ranges of addresses within a memory space of a memory system. For example, the memory manager may allocate a physical region of memory that includes memory boundaries. Accessing memory within the different memory boundaries may correspond to varying latency costs. Thus, the performance records may indicate to the host system a mapping between the ranges of addresses within the memory space and the corresponding latency cost associated with accessing an address within the range. In some examples, a host system may sort data for storage within the memory system based on the performance records associated with the allocated memory space.