HMB Segment Selection Using Initialization-Phase Performance Testing
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Solution Overview
Problem
Existing HMB segment selection methods in data storage devices are inefficient, leading to low performance and quality of service due to the lack of consideration of multiple factors beyond segment size, resulting in unused segments and suboptimal utilization.
Innovation Solution
Perform performance measurements on provided HMB segments during initialization, including read, write, and mixed operations, to select segments based on performance results, ensuring optimal HMB segment selection for improved SSD performance and QoS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If HMB segments are selected based solely on size, then the selection process is simple, but performance and quality of service deteriorate due to suboptimal segment utilization
Solution Approach 1:
The patent performs preliminary performance measurements and experiments on HMB segments during the initialization phase before the SSD operates. This advance testing establishes performance baselines and identifies optimal segments without impacting runtime performance, resolving the contradiction between simple selection and optimal performance.
Solution Approach 2:
The system performs self-testing and self-evaluation of HMB segments during initialization. The controller automatically measures performance characteristics of available segments and selects the most suitable ones without external intervention, achieving both automated simplicity and performance optimization.
2Productivity
If performance measurements are performed on all HMB segments, then optimal selection is achieved, but initialization time and complexity increase
Solution Approach 1:
The patent performs performance measurements on a representative subset of HMB segments rather than exhaustively testing all segments. This partial action approach achieves sufficient optimization for practical purposes while significantly reducing initialization time and complexity compared to complete testing.
3Quantity of substance
If more HMB segments are provided by the host, then memory capacity increases, but performance deteriorates due to inability to utilize all segments effectively
Solution Approach 1:
The patent identifies and selects specific HMB segments with optimal performance characteristics for particular functions, rather than uniformly utilizing all segments. This local quality approach assigns different segments to different roles based on their measured performance, enabling effective utilization of larger memory capacities while maintaining high quality of service.
Data Source
AI summary
The present disclosure generally relates to improved host memory buffer (HMB) segment selection at the initialization phase. Rather than selecting an HMB segment strictly on one parameter, the selection process will consider multiple factors of the HMB segments. Instead of just selecting a HMB segments based on the size of the HMB segment, the data storage device will perform some basic performance measurements on the provided HMB segments before selecting HMB segments. The selection will be based also on the performance results from the various experiments. The experiments are performed in the initialization phase so the performance of the solid state drive (SSD) will not be impacted. The basic experiments include read, write, and mixed operations toward the HMB segments while measuring the performance and QoS.