NVMe (Non-Volatile Memory Express) data read-write method and NVMe equipment

Abstract

The invention relates to the technical field of storage, in particular to an NVMe (Non-Volatile Memory Express) data read-write method and NVMe equipment. The method comprises the following steps that: a transceiver receives an NVMe command which is written into an SQ (Submission Queue) by a host; when the SQ control module detects that the SQ changes in an SQ cache, the NVMe command in the SQ issent to an SSD (Solid State Drives) controller; the SSD controller executes the NVMe command and writes the generated NVMe command response into a CQ (Completion Queue) through a CQ control module; and the SSD controller notifies the host to read the CQ through trigger interruption to enable the host to process the NVMe command response in the CQ. Since the SQ and the CQ are both positioned in theNVMe equipment, the CPU (Central Processing Unit) can directly read the NVMe response command in the CQ or directly writes the NVMe command into the SQ so as to further lower the consumption of CPU resources. In addition, a way designed by the NVMe equipment can support CCIX (Cache Coherent Interconncet for Acceleration) on hardware, and therefore, the heterogeneous calculation of software memoryunification and an I / O operation can be realized.

Description

technical field [0001] The invention relates to the field of storage technology, in particular to a method for reading and writing NVMe data and an NVMe device. Background technique [0002] The non-volatile high-speed transmission bus (NVMe, non-volatile memory express) protocol defines the driver software and non-volatile storage subsystems, such as peripheral component interconnection standards and interfaces (PCIe, peripheral component interconnect express) solid-state hard disk (SSD , Solid State Drives), etc., the command set, queue and register interface for the interaction between the driver software and the non-volatile storage subsystem, which also defines the basic command set of the NVM subsystem. It is an extensible host control interface suitable for addressing the needs of enterprise and client systems using PCIe SSDs. [0003] There are many steps in the processing flow of the existing NVMe command. In the execution flow of the NVMe command, it is the host s...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides an NVMe data reading and writing method and an NVMe device to solve the problems of the existing NVMe command execution process is long, the time delay consumption is large, and the amount of CPU resources occupied is large.

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