NUMA Memory Allocation Using Access Latency and Page Cache
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Non-uniform memory access (NUMA) systems face challenges in determining target nodes without considering access latency, leading to inefficient memory allocation and management.
Innovation Solution
An electronic device and memory management method that allocates memory based on access latency and page cache hit ratio, prioritizing faster nodes for pages with mapped files and slower nodes for unmapped files, enhancing memory performance and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If memory allocation in NUMA systems is performed without considering access latency, then memory allocation simplicity is maintained, but memory access performance deteriorates
Solution Approach 1:
The system performs preliminary actions by determining access latency and checking page cache hit ratios before memory allocation. The memory management unit proactively gathers information about access patterns and cache status, then uses this information to pre-determine the optimal target node for memory allocation, avoiding the need for runtime adjustments and improving access speed while maintaining allocation simplicity
Solution Approach 2:
The system implements feedback mechanisms by monitoring page cache hit ratios and access latency patterns. This feedback information is used to dynamically adjust memory allocation decisions, ensuring that pages are allocated to nodes that have demonstrated better access performance and cache utilization, thereby improving memory access speed without complicating the allocation process
2Device complexity
If memory pages are allocated without considering page cache hit ratio, then allocation process is simplified, but memory usage efficiency deteriorates
Solution Approach 1:
The system changes the allocation parameters by incorporating page cache hit ratio as a key decision criterion. Instead of using simple first-fit or round-robin allocation, the memory management unit evaluates the page cache hit ratio of candidate nodes and selects the node with the optimal ratio, improving memory usage efficiency while managing complexity through automated parameter evaluation
3Ease of operation
If all memory nodes are treated equally in allocation, then allocation fairness is maintained, but access performance varies due to latency differences
Solution Approach 1:
The system applies local quality by treating different memory nodes differently based on their specific characteristics. Instead of uniform allocation, the memory management unit evaluates local conditions such as access latency and page cache hit ratio for each node, then allocates pages to the node with the most favorable local conditions, reducing access latency while maintaining fairness through performance-based allocation
Data Source
AI summary
An electronic device and a method for memory management are provided. The electronic device may include a first memory in a first node; a second memory in a second node having a slower access speed than the first node; and a third memory storing one or more instructions, that when executed, cause the electronic device to receive a request for memory allocation of a page; determine whether the request is for a file that has at least one page mapped to any memory from the one or more memories; and allocate the page to the first memory in the first node based on the file having at least one page mapped to the memory.