Memory Read Queue Grouping for Lower Random Read Latency
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Solution Overview
Problem
Existing storage devices face inefficiencies in processing random read operations due to bottlenecks in command queues, leading to increased response times for small-sized data requests.
Innovation Solution
Implementing a memory device with a control circuit that performs grouped read operations, including a queue management system to store and process multiple read commands simultaneously, allowing internal read and output operations to overlap, thereby reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If read commands are processed sequentially in a queue, then the device structure remains simple, but the read operation latency increases
Solution Approach 1:
The patent implements a queue management system that pre-stores multiple read commands in a queue structure before execution. The control circuit prepares and organizes read commands in advance, allowing the memory device to process multiple read operations in a batch rather than waiting for each command to be processed individually. This preliminary organization of commands reduces the overall latency by eliminating idle time between sequential operations.
2Productivity
If multiple read commands are processed concurrently, then the productivity improves, but the device complexity increases
Solution Approach 1:
The patent divides the read operation into distinct segments: command storage in a queue, command retrieval by the control circuit, and actual memory read operations. By segmenting the processing flow, the system can manage multiple read commands concurrently through structured queue operations rather than requiring complex parallel processing logic. The control circuit retrieves commands from the queue in an organized manner, enabling efficient batch processing while maintaining manageable control circuit complexity.
3Loss of time
If the queue depth is increased to store more read commands, then the latency is reduced, but the memory resource consumption increases
Solution Approach 1:
The patent implements a queue depth configuration that stores a predetermined number of read commands - sufficient to mask the latency of memory operations but not excessively large to waste resources. The queue depth is optimized to hold just enough commands to maintain continuous operation during read cycles, avoiding both under-utilization (which would increase latency) and over-provisioning (which would waste memory resources). This partial action approach achieves the latency reduction goal with minimal resource investment.
Data Source
AI summary
A memory device includes a cell region, a buffer region, and a control circuit configured to: sequentially store read commands in a queue, and control the cell region and the buffer region to perform grouped read operations of outputting respective data blocks requested by the respective read commands.