Cache Line Chunk Segmentation for Latency Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current memory systems face challenges in improving cache memory performance, particularly in reducing latency and enhancing hit rates, which are crucial for overall system performance.
Innovation Solution
The implementation of a cache line data management system where each cache line is divided into chunks of data, with a cache controller managing these chunks at a granular level, using metadata for hit/miss determinations and prioritizing data based on access frequency and type, allowing for efficient data transfer and eviction strategies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If cache memory is used to improve system performance, then access speed is improved, but cache size is limited and eviction decisions become complex
Solution Approach 1:
The cache line is segmented into multiple independently accessible chunks. Instead of treating the entire cache line as a single unit, the system divides it into chunks that can be individually accessed, read, or evicted. This segmentation reduces the granularity of management operations and allows for more flexible cache control while maintaining performance.
2Reliability
If entire cache lines are transferred for hit/miss determinations, then data integrity is maintained, but transfer time and latency increase
Solution Approach 1:
The patent extracts only the necessary portion of the cache line (specific chunks) for hit/miss determinations rather than transferring the entire cache line. The cache controller identifies and retrieves only the relevant chunks needed for the current access request, thereby reducing transfer time and latency while maintaining data integrity for the accessed portions.
Solution Approach 2:
Instead of performing a complete cache line transfer for every access, the system performs partial action by transferring only the specific chunks that are needed. This partial transfer approach reduces the amount of data moved during cache operations, directly decreasing access latency while still ensuring data integrity for the required information.
3Ease of manufacture
If cache lines are evicted in full, then cache management is simplified, but useful data may be unnecessarily discarded
Solution Approach 1:
By segmenting the cache line into independent chunks, the system allows for selective eviction of only those chunks that are no longer needed while preserving other chunks that may still be useful. This granular eviction approach prevents unnecessary data loss while maintaining relatively simple cache management through the use of chunk-level metadata tracking.
Solution Approach 2:
The patent applies local quality by treating different chunks within a cache line differently based on their individual usage patterns and validity states. Each chunk can have its own metadata indicating whether it is valid, dirty, or ready for eviction, allowing the cache controller to make localized eviction decisions that preserve useful data while maintaining manageable complexity through systematic tracking.
Data Source
AI summary
The present disclosure includes apparatuses and methods related to a memory system with cache line data. An example apparatus can store data in a number of cache lines in the cache, wherein each of the number of lines includes a number of chunks of data that are individually accessible.