Memory Sub-System Partial Write Command Execution
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Solution Overview
Problem
Traditional memory sub-systems face performance losses and inefficiencies due to fixed input/output sizes for write commands, leading to increased data buffering and less efficient data programming methods.
Innovation Solution
Implementing a communication protocol that allows for partial execution of write commands based on the current state of the physical media layout, determining preferred input/output sizes for optimized execution and reporting these sizes back to the host system, enabling variable-sized write operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fixed input/output sizes are used for write commands, then simplicity of operation is maintained, but performance is reduced and data buffering time increases
Solution Approach 1:
The patent implements dynamic I/O size adjustment where the memory sub-system determines and reports optimal I/O sizes to the host system based on current media layout state. Write commands can then be executed with variable sizes matching the actual capacity of available media units, rather than using fixed sizes. This dynamic adaptation eliminates the need to buffer data until fixed-size boundaries are reached, directly reducing data buffering time while improving write efficiency.
Solution Approach 2:
The system changes the parameter of I/O size from a fixed value to a variable value that adapts to the media layout state. The memory sub-system analyzes the physical layout to determine optimal I/O sizes and communicates these back to the host, allowing write operations to be performed with size parameters that match actual media capacity. This parameter change enables more efficient data programming methods and reduces buffering requirements.
2Productivity
If fixed input/output sizes are used for write commands, then ease of operation is maintained, but data programming efficiency decreases
Solution Approach 1:
The memory sub-system performs self-service by autonomously determining its own optimal I/O sizes based on its internal media layout state and reporting these back to the host system. This eliminates the need for the host to manually configure or guess appropriate I/O sizes, maintaining ease of operation while enabling efficient data programming. The memory sub-system essentially manages its own operational parameters to optimize performance.
Solution Approach 2:
The system implements a feedback loop where the memory sub-system analyzes its media layout state, determines optimal I/O sizes, and communicates these back to the host system. This feedback mechanism allows the host to issue write commands with appropriately sized I/O operations, improving data programming efficiency without complicating the host's operation. The host simply follows the size recommendations provided by the memory sub-system.
3Productivity
If variable-sized write operations are implemented, then memory sub-system efficiency is improved, but device complexity increases
Solution Approach 1:
The patent extends the existing NVLink protocol to support variable-sized I/O operations while maintaining compatibility with existing fixed-size operations. The same communication infrastructure and command structures are used, but with added flexibility in the size parameter. This universal approach allows the system to support both fixed and variable I/O sizes without requiring separate protocols or complex translation layers, thereby improving efficiency without proportionally increasing complexity.
Solution Approach 2:
The memory sub-system performs preliminary analysis of its media layout state before determining optimal I/O sizes. By pre-calculating and reporting the ideal I/O sizes to the host system in advance, the system enables the host to prepare appropriately sized write commands. This preliminary action prevents the need for complex runtime adjustments or multiple pass operations, simplifying the overall variable-sized operation implementation.
Data Source
AI summary
A memory sub-system configured to partially execute write commands from a host system to optimize performance. After receiving a write command from a host system, the memory sub-system can identify, based on a media physical layout, a preferred input/output size for the execution of the write command. The memory sub-system can execute the write command according to the preferred input/output size, configure a response for the write command to identify the second input/output size, and transmit the response identifying the second input/output size to the host system. The host system is configured to generate a subsequent write command to write at least the data that is initially identified in the write command that has been executed but not been included in the execution of the write command performed according to the preferred input/output size.