Storage Controller Input Queue Bottleneck Detection
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Solution Overview
Problem
Data storage devices face performance degradation due to input queue bottlenecks in the data/control path between a host device and a memory device, caused by inequalities in processing power and queue lengths among hardware modules, leading to decreased read and write performance.
Innovation Solution
A data storage device with a controller that detects bottlenecks in the input queue or hardware modules and executes bottleneck release operations by changing the clock of affected hardware modules, relocating messages to different queues, or rerouting data through less congested paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If hardware modules have different processing speeds and queue lengths, then each module can be optimized for its specific function, but bottlenecks arise in the data/control path that decrease overall read and write performance
Solution Approach 1:
The system dynamically adjusts the clock frequency of hardware modules based on real-time bottleneck detection. When a bottleneck is detected in a specific module, the controller increases its clock speed to accelerate processing. This dynamic adaptation allows the system to maintain specialized hardware functions while resolving performance bottlenecks on-demand.
Solution Approach 2:
The controller changes operational parameters (clock frequency) of hardware modules to optimize performance. By detecting queue lengths and processing speeds, the system adjusts clock parameters to balance the data/control path, ensuring that no single module becomes a bottleneck while preserving the specialized functions of each hardware component.
2Quantity of substance
If the input queue length is increased to handle more commands, then command throughput may improve, but bottlenecks can occur when the queue exceeds processing capacity
Solution Approach 1:
The controller continuously monitors the input queue length and processing status of hardware modules, using this feedback to detect bottlenecks. When the queue length indicates a bottleneck (exceeding threshold values), the controller activates bottleneck release operations. This feedback mechanism allows the system to maintain large queue capacity while automatically responding to and resolving processing bottlenecks.
Solution Approach 2:
The system performs self-diagnosis and self-correction by automatically detecting bottlenecks through monitoring queue lengths and processing speeds. The controller autonomously identifies when a hardware module is becoming a bottleneck and executes bottleneck release operations without external intervention, maintaining efficient command processing despite varying queue loads.
3Speed
If bottleneck release operations increase clock frequency, then processing speed improves, but energy consumption increases
Solution Approach 1:
The controller periodically monitors for bottlenecks and applies clock frequency adjustments only when necessary. Rather than maintaining high clock frequencies continuously, the system uses periodic bottleneck detection and applies speed increases temporarily only when bottlenecks are detected. This periodic action reduces overall energy consumption while maintaining high processing speeds when needed.
Solution Approach 2:
The system dynamically changes clock frequency parameters based on actual bottleneck conditions. When no bottleneck is detected, the hardware modules operate at lower, more energy-efficient frequencies. When a bottleneck is detected through monitoring, the controller temporarily increases the clock frequency to resolve the bottleneck, then returns to lower frequencies once the bottleneck is cleared, optimizing the balance between speed and energy consumption.
Data Source
AI summary
A data storage device includes a memory device and a controller coupled to the memory device. The controller is configured to receive a read command to read data from the memory device or a write command to write data to the memory device from a host device, determine whether a bottleneck exists in a data/control path between the host device and the memory device, wherein the bottleneck exists in an input queue corresponding to a hardware module of a plurality of hardware modules, and execute a bottleneck release operation when the bottleneck exists in the data/control path between the host device and the memory device, wherein the bottleneck release operation is dependent on whether the bottleneck exists in the input queue. The bottleneck release operation includes changing a clock of the hardware module, moving the command to a different hardware module configured to process the command, and combinations thereof.