An Alignment Optimization Design for Embedded NVMe Storage Device
The software storage stack in the embedded field is relatively streamlined,when upper level software such as embedded file system using NVMe driver,there is no dedicated fast device management layer to handle buffer misalignment,causing operational failure,inconsistent data content,and other is-sues.This article proposes an alignment optimization design to address this issue,when the user's read/write buffer does not meet the alignment requirement,dynamic maintenance of aligned chain buffer pool,to complete data transfer for NVMe controller.Simultaneously established a multi linked list alignment buffer pool based on the number of channels,and use counting semaphore to ensure the concurrency per-formance of NVMe driver.Through this optimization design,the issue of unavailability caused by align-ment in embedded NVMe driver can be solved with minimal performance loss.
万方数据
维普
