Memory Control Circuit Pre-Read Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing memory storage devices face reduced data reading efficiency when dealing with deep command sequences or large amounts of data, as pre-reading operations can instead hinder performance.
Innovation Solution
A memory control method that determines the necessity of a pre-read operation based on the total data amount and depth information of read commands, optimizing data reading by pre-reading data from logical units mapped to physical units in a rewritable non-volatile memory module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If pre-read operation is performed for deep command sequences or large data amounts, then data reading efficiency should be improved, but actual reading efficiency decreases due to unnecessary pre-reading operations
Solution Approach 1:
The patent changes the decision parameter for pre-read operations from a fixed rule to a dynamic evaluation based on command sequence depth and data amount thresholds. The controller evaluates whether the command sequence depth exceeds a first threshold and whether the data amount exceeds a second threshold before initiating pre-read operations, allowing adaptive adjustment of pre-read behavior based on actual workload characteristics
Solution Approach 2:
The patent introduces a feedback mechanism where the controller continuously monitors command sequence depth and data amount metrics, and uses this information to dynamically control the execution of pre-read operations. This feedback loop prevents unnecessary pre-reading by evaluating current system state against predefined thresholds, thereby avoiding time waste while maintaining productivity benefits when pre-reading is actually beneficial
2Speed
If pre-read operation is always performed, then next to-be-accessed data can be prepared in advance, but system complexity increases and performance deteriorates for certain command patterns
Solution Approach 1:
The patent introduces two key parameters - command sequence depth threshold and data amount threshold - that dynamically control pre-read operation execution. This parameter-based control simplifies the decision logic compared to always performing pre-read, while still enabling fast data access when conditions warrant it. The thresholds act as simple gatekeepers that avoid complex predictive algorithms
Solution Approach 2:
The patent makes the pre-read operation dynamic by conditioning its execution on real-time evaluation of command sequence characteristics. Rather than a static always-on pre-read mechanism, the system adapts pre-read behavior based on whether current workload patterns match scenarios where pre-reading provides benefit, thereby maintaining speed while reducing unnecessary operational complexity
Data Source
AI summary
A memory control method for a rewritable non-volatile memory module is provided according to embodiments of the disclosure. The method includes: receiving at least one first read command from a host system; and determining, according to a total data amount of to-be-read data indicated by the at least one first read command, whether to start a pre-read operation. The pre-read operation is configured to pre-read data stored in at least one first logical unit, and the first logical unit is mapped to at least one physical unit.