Memory Controller Host-Aware Map Data Selection
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Solution Overview
Problem
Existing memory controllers face challenges in efficiently managing map data transmission to hosts, particularly when the host memory is saturated, leading to inefficiencies in data storage and retrieval due to the lack of effective mechanisms for adjusting activation counts and selecting appropriate map data.
Innovation Solution
A memory controller with an address counter and map data selector that dynamically adjusts activation counts and selects map data based on preset reference values and storage capacity, allowing for the decrease of activation counts and reselection of map data when storage capacity is exceeded, thereby optimizing data transmission in a host-aware performance booster mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If map data is continuously transmitted to the host without managing host memory saturation, then data transmission speed is improved, but host memory saturation occurs leading to system performance degradation
Solution Approach 1:
The memory controller monitors the activation count of map data and compares it against a reference value, creating a feedback mechanism that dynamically adjusts transmission based on host memory status. When the activation count exceeds the reference value, the controller selectively transmits only high-activation map data, preventing host memory saturation while maintaining efficient data transmission.
Solution Approach 2:
The system changes the parameter of map data selection by using activation count as a dynamic criterion. Map data transmission is controlled by adjusting which map data is transmitted based on their activation counts, transforming the static transmission approach into a dynamic parameter-based selection mechanism that adapts to host memory conditions.
2Quantity of substance
If all map data are transmitted to the host, then data availability is improved, but storage capacity consumption increases leading to inefficient memory usage
Solution Approach 1:
The memory controller extracts only the necessary map data from the complete set of map data. By comparing activation counts against a reference value, the controller selectively transmits only those map data entries that exceed the threshold, extracting the essential information needed by the host while leaving unnecessary data in the storage device, thus optimizing storage capacity usage.
Solution Approach 2:
Instead of transmitting all map data (excessive action), the system transmits only the necessary portion that exceeds the reference activation count. This partial transmission approach provides sufficient data availability for host operations while avoiding the waste of transmitting redundant map data that would consume unnecessary storage capacity.
3Reliability
If activation count management is implemented to prevent host memory saturation, then system reliability is improved, but device complexity increases due to additional control mechanisms
Solution Approach 1:
The memory controller performs preliminary action by pre-calculating and monitoring activation counts of map data before transmission occurs. This advance preparation allows the controller to identify which map data should be transmitted based on predetermined reference values, enabling reliable host memory management through proactive rather than reactive control mechanisms.
Data Source
AI summary
An electronic device includes a memory controller selecting map data to be output to a host. The memory controller includes an address counter and a map data selector. The address counter counts a number of times a logical block address corresponding to a request is received based on the request received from the host and outputs an activation signal indicating that an index to which the logical block address belongs is an activation index when an activation count corresponding to the index is equal to or greater than a preset value, the activation count being generated based on a counting result. The map data selector selects map data to be output to the host based on the activation signal. The address counter decreases the activation count by a preset size when a size of the selected map data exceeds a storage capacity of the host allocated for storing map data.