A method and device for processing the full state of the io queue of a solid-state hard disk

Abstract

The present invention provides a method and device for processing the full state of an IO queue of a solid-state hard disk. The method includes: creating a linked list in memory and establishing several storage nodes; Return to the preset state, store the IO completion command in the idle storage node, and attach the storage node storing the IO completion command to the linked list; after the preset time, place the first storage node in the linked list in the order of attachment The stored IO completion command is sent to the IO completion engine and the IO completion command is deleted in the first storage node; in response to the IO completion engine returning a message that the IO completion command was successfully processed, the IO completion command is released. By using the solution of the present invention, it can be effectively ensured that the solid-state hard disk can operate normally without causing a performance bottleneck when the queue is full.

Description

technical field [0001] The field relates to the field of computers, and more particularly to a method and device for processing the full state of an IO queue of a solid state disk. Background technique [0002] With the continuous development of storage systems, NVMe SSDs (solid-state drives) are more and more widely used. After the corresponding IO command is completed, the completion status is returned to the Host through the IO completion queue. Since the IO protocol stack on the Host side will have a large overhead in command processing, the IO completion command returned by the SSD cannot be processed in time. On the SSD side, the IO completion queue is full, resulting in a bottleneck in performance bandwidth. SUMMARY OF THE INVENTION [0003] In view of this, the purpose of the embodiments of the present invention is to provide a method and device for processing the full state of the IO queue of a solid-state hard disk. By using the method of the present invention, ...

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of the storage system, NVMe SSD (solid state drive) is more and more widely used. The Host (host) sends the IO request of the kernel Block (block) layer through the NVMe IO (input and output) submission queue. SSD After the corresponding IO command is completed, the completion status is returned to the Host through the IO completion queue. Since the IO protocol stack on the Host side will have a large overhead during command processing, the IO completion command returned by the SSD cannot be processed in time, and the The IO completion queue is full on the SSD side, resulting in a bottleneck in performance bandwidth

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