Write Buffer Read Bypass for Low-Latency Memory Access
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional memory sub-systems experience increased latency and reduced quality of service due to the need to search buffers for data before reading from memory components, which can lead to data corruption and exceed error correction capabilities, especially when reading data shortly after writing.
Innovation Solution
Perform a read operation that bypasses the initial search for data in the buffer and directly reads from memory components, followed by error correction, and if errors persist, search the buffer for corrected data or reprogram memory components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the memory sub-system searches the buffer for data before reading from memory components, then data reliability is improved by avoiding data corruption, but latency increases and quality of service deteriorates
Solution Approach 1:
The patent inverts the conventional read operation sequence by first attempting to read data directly from memory components and only then searching the buffer if errors are detected. This reversal of the traditional buffer-search-then-read approach eliminates the unnecessary buffer search step for successful reads, thereby reducing latency while maintaining data reliability through post-read error checking and correction.
Solution Approach 2:
The patent implements a fast path by skipping the buffer search step for reads that succeed on the first attempt from memory components. By rushing through the read operation directly to memory and only performing buffer search as a fallback for error cases, the system eliminates the time-consuming buffer search for the majority of successful reads, significantly reducing latency while preserving reliability through subsequent error detection and correction.
2Reliability
If the memory sub-system performs buffer search before read operation, then data corruption is prevented, but the speed of data retrieval is reduced
Solution Approach 1:
The patent inverts the conventional sequence by performing the read operation from memory components first and only then searching the buffer if data corruption is detected. This reversal allows the system to achieve fast data retrieval by skipping the buffer search step for successful reads, while maintaining corruption prevention through post-read error detection and correction mechanisms.
Solution Approach 2:
The patent implements a fast path by skipping the buffer search step for reads that succeed on the first attempt from memory components. By rushing through the read operation directly to memory and only performing buffer search as a fallback for error cases, the system eliminates the time-consuming buffer search for the majority of successful reads, significantly improving data retrieval speed while preserving reliability through subsequent error detection and correction.
3Reliability
If conventional read operations search buffer initially, then data integrity is ensured, but quality of service deteriorates
Solution Approach 1:
The patent inverts the conventional read operation sequence by first attempting to read data directly from memory components and only then searching the buffer if errors are detected. This reversal of the traditional buffer-search-then-read approach eliminates the unnecessary buffer search step for successful reads, thereby improving quality of service by reducing processing time while maintaining data integrity through post-read error checking and correction.
Solution Approach 2:
The patent implements a fast path by skipping the buffer search step for reads that succeed on the first attempt from memory components. By rushing through the read operation directly to memory and only performing buffer search as a fallback for error cases, the system eliminates the time-consuming buffer search for the majority of successful reads, significantly improving quality of service while preserving reliability through subsequent error detection and correction.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A read operation to retrieve data from memory component and that bypasses a prior search for the data at a buffer in a read data path associated with the read operation can be performed. Responsive to performing the read operation that bypasses the prior search for the data at the buffer, the data is returned to a host system.