Host Interface Error Circuitry for Write Command Deletion
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Solution Overview
Problem
Memory sub-systems face inefficiencies when handling multiple write commands to the same address within a short interval, as existing solutions require cache controllers to perform resource-intensive comparisons, leading to delayed execution of other commands.
Innovation Solution
The implementation of error circuitry in the host interface to identify and mark write commands writing to the same address, allowing the cache controller to delete earlier commands and execute the latest one, thereby freeing resources and improving command pipeline efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the cache controller performs resource-intensive comparisons to identify multiple write commands to the same address, then the accuracy of command merging is improved, but the execution speed of other commands deteriorates due to resource occupation
Solution Approach 1:
The patent extracts the comparison function from the cache controller to a dedicated comparison circuit in the host interface. This separation allows the cache controller to focus on command execution while the comparison circuit independently identifies duplicate write commands, thus improving execution speed without sacrificing merging accuracy
Solution Approach 2:
The comparison circuit acts as an intermediary between the host interface and cache controller. It pre-processes write commands by comparing addresses and marking duplicates before commands reach the cache controller, enabling accurate command merging without occupying cache controller resources
2Reliability
If the cache controller performs comprehensive command comparison and processing, then the reliability of write operations is improved, but the productivity of the command pipeline deteriorates due to resource constraints
Solution Approach 1:
The patent segments the command processing function into two independent parts: a comparison circuit in the host interface that handles address comparison and command marking, and a cache controller that handles command execution. This segmentation enables parallel processing, improving pipeline throughput while maintaining write operation reliability through the dedicated comparison function
Solution Approach 2:
The comparison circuit performs preliminary comparison and marking of write commands before they reach the cache controller. This pre-processing ensures reliable identification of duplicate commands without blocking the command pipeline, as the cache controller simply executes marked commands without performing resource-intensive comparisons
3Stability of the object's composition
If the cache controller executes multiple write commands to the same address, then data consistency is maintained, but the loss of time increases due to redundant execution
Solution Approach 1:
The comparison circuit performs preliminary comparison of write command addresses and marks duplicate commands before execution. This allows the cache controller to identify and skip redundant write operations, reducing execution time while maintaining data consistency by ensuring the latest write command is always executed
Solution Approach 2:
Instead of executing all write commands and filtering duplicates after execution, the patent inverts the approach by marking duplicate commands for deletion before execution. This prevents redundant execution from the outset, saving time while maintaining data consistency through selective command execution
Data Source
AI summary
An interface of a memory sub-system can determine that a particular write command received from a host has a same address as a subsequently received write command from the host. The interface can delete the particular write command if it is still in the interface or send a signal to delete the particular write command if the write command has already been provided from the interface.