WO2024130890A1

WO2024130890A1 - Solid state drive garbage collection method, solid state drive garbage collection acceleration apparatus, and device and computer medium

Info

Publication number: WO2024130890A1
Application number: PCT/CN2023/086117
Authority: WO
Inventors: 夏城; 孟鹏涛
Original assignee: 深圳大普微电子科技有限公司
Priority date: 2022-12-23
Filing date: 2023-04-04
Publication date: 2024-06-27
Also published as: CN115934579A

Abstract

A solid state drive (SSD) garbage collection (GC) method, an SSD GC acceleration apparatus, and a device and a computer medium. The method is applied to an SSD GC acceleration apparatus, and comprises: receiving a target GC command sent by GC management software of a target SSD; on the basis of the target GC command, generating a target read command corresponding to an SSD master controller of the target SSD; transmitting the target read command to the SSD master controller, such that the SSD master controller reads corresponding target data from a first flash memory block on the basis of the target read command; on the basis of the target GC command, generating a target write command corresponding to the SSD master controller; and transmitting the target write command to the SSD master controller, such that the SSD master controller writes the target data into a second flash memory block on the basis of the target write command. In the present application, GC management software only requires one instance of software hardware interaction with an SSD master controller to complete a GC operation, thereby reducing software and hardware interaction latency, and improving the GC efficiency of an SSD.

Description

Solid state hard disk garbage recovery method, acceleration device, equipment and computer medium

This application claims priority to the Chinese patent application filed with the China Patent Office on December 23, 2022, with application number 202211666319.9 and invention name “Solid State Drive Garbage Recovery Method, Acceleration Device, Equipment and Computer Medium”, all contents of which are incorporated by reference in this application.

Technical Field

The present application relates to the field of computer technology, and in particular to a solid state hard disk garbage recovery method, an acceleration device, equipment and a computer medium.

Background technique

GC (Garbage Collection) is a basic technology of Solid State Drives (SSD). It has a direct impact on the performance and life of SSD. The GC function of SSD controller can be roughly understood as the defragmentation function of ordinary hard disk. It reads the valid data in SSD flash memory blocks into the external data cache in sequence. When the total length of the read data reaches the SSD page size, the valid data in the external cache is written to a new flash memory block, and then the old flash memory block is erased to obtain a new flash memory block.

In order to achieve GC control of SSD, software can be used to perform GC operation on SSD. In this process, the software needs to find the storage location of valid data nand (NAND flash memory) through FTL (flash translation layer), allocate new nand write location, and manage data cache space according to operation commands. For example, space needs to be allocated when reading commands, and space needs to be released after the write command is executed. In addition, the SSD master controller read and write commands need to be constructed and sent to the SSD master controller, and the command completion returned by the SSD master controller needs to be recovered. In this way, in a GC process, there are often multiple read commands and one write command. The software must ensure that the completion of all GC read commands is received before sending the write command to the SSD master controller. After receiving the completion of the write command, the data cache space can be released. This will cause frequent interaction between software and hardware (SSD master controller) during the entire GC process, and each software-hardware interaction will introduce software-hardware interaction latency, resulting in a longer interval from allocation to release of cache space, which in turn leads to a lower interest rate efficiency of the entire data cache space, affecting the GC efficiency of the SSD.

In summary, how to improve the garbage collection efficiency of solid state drives is an urgent problem to be solved by those skilled in the art.

Summary of the invention

The purpose of this application is to provide a solid state drive garbage collection method, which can solve the technical problem of how to improve the garbage collection efficiency of solid state drives to a certain extent. This application also provides a solid state drive garbage collection acceleration device, an electronic device and a computer-readable storage medium.

In order to achieve the above objectives, this application provides the following technical solutions:

A solid state drive garbage collection method, applied to a solid state drive garbage collection acceleration device, comprising:

Receive a target GC command sent by the GC management software of the target solid state drive;

Based on the target GC command, generating a target read command corresponding to the SSD master controller of the target solid state drive;

Transmitting the target read command to the SSD master controller, so that the SSD master controller reads corresponding target data from the first flash memory block based on the target read command;

Based on the target GC command, generating a target write command corresponding to the SSD master controller;

The target write command is transmitted to the SSD master controller, so that the SSD master controller writes the target data into the second flash memory block based on the target write command.

Preferably, generating a target read command corresponding to an SSD master controller of the target solid state drive based on the target GC command includes:

Acquire a pre-stored command template of the SSD master controller, wherein the command template includes a fixed field and a parameter field;

Extracting a read command parameter field in the target GC command;

The parameter field in the command template is replaced with the read command parameter field to obtain the target read command.

Preferably, after transmitting the target read command to the SSD master controller, the method further includes:

Determining a storage address of the target read command in the data cache space;

The target data read by the SSD master controller is acquired, and the target data is cached in the data cache space according to the storage address.

Preferably, determining the storage address of the target read command in the data cache space includes:

Determine the buffer number corresponding to the target read command;

Determine the product value of the buffer zone number and the buffer zone size as the storage address;

The buffer area includes a storage space obtained by evenly dividing the data cache space.

The target read command and the target data are recorded.

Preferably, after transmitting the target write command to the SSD master controller, the method further includes:

The storage space corresponding to the storage address in the data cache space is released.

A target GC response instruction corresponding to the target GC command is generated, and the target GC response instruction is transmitted to the GC management software.

A solid state hard disk garbage collection acceleration device, comprising:

A receiving port, used to receive a target GC command sent by the GC management software of the target solid state drive;

A command builder is used to generate a target read command corresponding to the SSD master controller of the target solid state drive based on the target GC command; transmit the target read command to the SSD master controller so that the SSD master controller reads the corresponding target data from the first flash memory block based on the target read command; generate a target write command corresponding to the SSD master controller based on the target GC command; transmit the target write command to the SSD master controller so that the SSD master controller writes the target data into the second flash memory block based on the target write command.

An electronic device, comprising:

Memory for storing computer programs;

A processor is used to implement the steps of any of the solid state drive garbage collection methods described above when executing the computer program.

A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of any of the solid-state hard disk garbage collection methods described above are implemented.

The present application provides a solid-state hard disk garbage collection method, which is applied to a solid-state hard disk garbage collection acceleration device, receiving a target GC command sent by the GC management software of the target solid-state hard disk; based on the target GC command, generating a target read command corresponding to the SSD main controller of the target solid-state hard disk; transmitting the target read command to the SSD main controller, so that the SSD main controller reads the corresponding target data from the first flash memory block based on the target read command; based on the target GC command, generating a target write command corresponding to the SSD main controller; transmitting the target write command to the SSD main controller, so that the SSD main controller writes the target data to the second flash memory block based on the target write command. In the present application, after receiving the target GC command sent by the GC management software, the solid-state hard disk garbage collection acceleration device can generate a corresponding target read command and send it to the SSD main controller for processing, and can generate a corresponding target write command based on the target GC command and send it to the SSD main controller for processing, so that the GC management software can complete the GC operation only by performing a hardware and software interaction with the SSD main controller once, reducing the hardware and software interaction latency introduced by the hardware and software interaction, and improving the garbage collection efficiency of the solid-state hard disk. The solid-state hard disk garbage collection acceleration device, electronic device and computer-readable storage medium provided in this application also solve corresponding technical problems.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

FIG1 is a schematic diagram of data reading during GC operation;

FIG2 is a schematic diagram of data writing during GC operation;

FIG3 is a schematic diagram of data erasure during GC operation;

FIG4 is a schematic diagram of executing a GC read command on a solid state drive with the aid of software;

FIG5 is a schematic diagram of executing a GC write command on a solid state drive with the aid of software;

FIG6 is a schematic diagram of the time composition of the entire GC in the prior art;

FIG7 is a first flow chart of a solid state drive garbage collection method provided by an embodiment of the present application;

FIG8 is a schematic diagram of GC time composition in the solid state drive garbage collection method provided by the present application;

FIG9 is a second flow chart of a solid state drive garbage collection method provided by an embodiment of the present application;

FIG10 is a schematic diagram of the structure of a solid state drive garbage collection system provided in an embodiment of the present application;

FIG11 is a diagram showing the interaction process between the solid state drive garbage collection acceleration device, the GC management software, and the SSD main controller;

FIG12 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

FIG. 13 is another schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

Detailed ways

The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

GC (Garbage Collection) is a basic technology of Solid State Drives (SSD). It has a direct impact on the performance and life of SSD. The GC function of SSD controller can be roughly understood as the defragmentation function of ordinary hard disk. It reads the valid data in SSD flash memory block to the external data cache in sequence. The process is shown in Figure 1. When the total length of the read data reaches the SSD page size, the valid data of the external cache is written to a new flash memory block. The process is shown in Figure 2. Then the old flash memory block is erased. The process is shown in Figure 3 to obtain a new flash memory block.

In order to achieve GC control of SSDs, software can be used to perform GC operations on SSDs; the whole process is shown in Figures 4 and 5. During this process, the software needs to find the storage location of valid data nand (NAND flash memory) through FTL (flash translation layer), allocate new nand write locations, and manage data cache space according to operation commands. For example, space needs to be allocated when reading commands, and space needs to be released after the write command is executed. In addition, the SSD master controller read and write commands need to be constructed and sent to the SSD master controller, and the command completion returned by the SSD master controller needs to be recovered. In this way, in a GC process, there are often multiple read commands and one write command, and the software It is necessary to ensure that all GC read command completions are received before the write command can be sent to the SSD master controller, and the data cache space can be released only after the write command completion is received. This will cause frequent interactions between software and hardware (SSD master controller) during the entire GC process, and each software-hardware interaction will introduce software-hardware interaction latency. The time composition of the entire GC is shown in Figure 6, which will cause the interval from cache space allocation to release to become longer, which will in turn cause the entire data cache space interest rate efficiency to become lower, affecting the GC efficiency of the solid-state drive. The solid-state drive garbage collection solution provided by this application can improve the garbage collection efficiency of the solid-state drive.

Please refer to FIG. 7 , which is a first flow chart of a solid state drive garbage collection method provided in an embodiment of the present application.

A solid state drive garbage collection method provided in an embodiment of the present application is applied to a solid state drive garbage collection acceleration device and may include the following steps:

Step S101: receiving a target GC command sent by the GC management software of the target solid state drive.

In actual applications, the solid state drive garbage collection acceleration device can first receive the target GC command sent by the GC management software of the target solid state drive. The content of the target GC command can be determined according to the specific GC operation requirements, and this application does not make specific limitations here.

Step S102: Based on the target GC command, a target read command corresponding to the SSD master controller of the target solid state drive is generated.

In actual applications, during the GC operation, the valid data in the target solid-state hard disk needs to be read out first. Therefore, after the solid-state hard disk garbage collection acceleration device receives the target GC command sent by the GC management software of the target solid-state hard disk, it can first generate a target read command corresponding to the SSD main controller of the target solid-state hard disk based on the target GC command, so as to subsequently control the SSD main controller to perform corresponding data reading operations based on the target read command.

Step S103: transmitting a target read command to the SSD master controller, so that the SSD master controller reads corresponding target data from the first flash memory block based on the target read command.

In actual applications, after the solid-state drive garbage collection acceleration device generates a target read command corresponding to the SSD master controller of the target solid-state drive based on the target GC command, the target read command can be transmitted to the SSD master controller, so that the SSD master controller reads the corresponding target data from the first flash memory block based on the target read command, that is, reads the valid data that needs to be retained from the first flash memory block as the target data.

Step S104: Based on the target GC command, a target write command corresponding to the SSD master controller is generated.

In actual applications, during the GC operation, the previously read data needs to be written into the solid-state drive. Therefore, after the solid-state drive garbage collection acceleration device transmits the target read command to the SSD master controller so that the SSD master controller reads the corresponding target data from the first flash memory block based on the target read command, it also needs to generate a target write command corresponding to the SSD master controller based on the target GC command, so as to control the SSD master controller to re-write the target data into the solid-state drive with the help of the target write command.

Step S105: transmitting the target write command to the SSD master controller, so that the SSD master controller writes the target data into the second flash memory block based on the target write command.

In actual applications, the solid-state drive garbage collection acceleration device generates a target write command corresponding to the SSD master controller based on the target GC command, and can transmit the target write command to the SSD master controller so that the SSD master controller writes the target data into the second flash memory block based on the target write command.

In a specific application scenario, after transmitting the target read command to the SSD main controller, the solid-state drive garbage collection acceleration device can also generate a target GC response instruction corresponding to the target GC command in order to promptly inform the GC management software that the GC operation has been completed, and transmit the target GC response instruction to the GC management software.

The present application provides a solid-state hard disk garbage collection method, which is applied to a solid-state hard disk garbage collection acceleration device, receiving a target GC command sent by the GC management software of the target solid-state hard disk; based on the target GC command, generating a target read command corresponding to the SSD main controller of the target solid-state hard disk; transmitting the target read command to the SSD main controller, so that the SSD main controller reads the corresponding target data from the first flash memory block based on the target read command; based on the target GC command, generating a target write command corresponding to the SSD main controller; transmitting the target write command to the SSD main controller, so that the SSD main controller writes the target data to the second flash memory block based on the target write command. In the present application, after receiving the target GC command sent by the GC management software, the solid-state hard disk garbage collection acceleration device can generate a corresponding target read command and send it to the SSD main controller for processing, and can generate a corresponding target write command based on the target GC command and send it to the SSD main controller for processing, so that the GC management software can complete the GC operation only by performing a hardware and software interaction with the SSD main controller once, reducing the hardware and software interaction latency introduced by the hardware and software interaction, and improving the garbage collection efficiency of the solid-state hard disk. To facilitate understanding of the efficiency of the solid-state hard disk garbage collection method provided by the present application, please refer to FIG. 8, which is a schematic diagram of the GC time composition in the solid-state hard disk garbage collection method provided by the present application. By comparing FIG. 8 with FIG. 6, it can be seen that the present application In one GC process, the software and hardware interact with each other at most twice, which is at least one less software and hardware interaction than the prior art. That is, the present application can reduce the software and hardware interaction latency introduced by the software and hardware interaction and improve the garbage collection efficiency of the solid-state hard disk.

Please refer to FIG. 9 , which is a second flow chart of a solid state drive garbage collection method provided in an embodiment of the present application.

Step S201: receiving a target GC command sent by the GC management software of the target solid state drive.

Step S202: Acquire a pre-stored command template of the SSD master controller, where the command template includes a fixed field and a parameter field.

Step S203: extracting the read command parameter field in the target GC command.

Step S204: Replace the parameter field in the command template with the read command parameter field to obtain the target read command.

In practical applications, when the solid-state drive garbage collection acceleration device generates a target read command corresponding to the SSD master controller of the target solid-state drive based on the target GC command, taking into account the different read and write command formats of different SSD master controllers, in order to quickly generate the read and write commands corresponding to the SSD master controller, the solid-state drive garbage collection acceleration device can obtain a pre-stored command template of the SSD master controller. The command template includes a fixed field and a parameter field, and its format can be as shown in Table 1, wherein the light gray table represents the SSD controller parameter field, and the dark gray table represents the SSD controller command fixed field; extract the read command parameter field in the target GC command; replace the parameter field in the command template with the read command parameter field to obtain a target read command compatible with different SSD master controllers.

Table 1 Command template diagram

For ease of understanding, assuming that in a specific application scenario, the read command template of the SSD master controller is as shown in Table 2, the solid-state drive garbage collection acceleration device can generate the target read command in the process of: First read the command template and opcode. The opcode is used to describe the parameter fields in the read command template and replace them with the gc sq fields. For example, bit0~bit3, bit4~8...are replaced with the fields in gc sq in sequence to generate the target read command, etc. Correspondingly, after receiving the target read command, the SSD master controller can parse the target read command in its own parsing method to respond, etc. As shown in Table 2, the read command field includes ch, fq, cmd_type, cmd_sub_type, lc, 2mtc, bitmap and other fields, among which cmd_type, cmd_sub_type, lc, 2mtc, gc fields are fixed fields, because the contents of these fields are the same for each read command; the remaining fields are called parameter fields, and the contents of these fields are different for each read command, and need to be replaced with the parameters in gc sq.

Table 2 Schematic diagram of the read command template of the SSD host controller

Step S205: transmitting the target read command to the SSD master controller, so that the SSD master controller reads the corresponding target data from the first flash memory block based on the target read command.

Step S206: Based on the target GC command, a target write command corresponding to the SSD master controller is generated.

In practical applications, when a solid-state drive garbage collection acceleration device generates a target write command corresponding to an SSD master controller based on a target GC command, the solid-state drive garbage collection acceleration device can obtain a pre-stored command template of the SSD master controller, the command template including a fixed field and a parameter field; extract the write command parameter field in the target GC command; replace the parameter field in the command template with the write command parameter field to obtain the target write command, etc.

Step S207: transmitting the target write command to the SSD master controller, so that the SSD master controller writes the target data into the second flash memory block based on the target write command.

In actual applications, after transmitting the target read command to the SSD main controller, the solid-state hard disk garbage collection acceleration device can also determine the storage address of the target read command in the data cache space; obtain the target data read by the SSD main controller, and cache the target data to the data cache space according to the storage address, so as to store the target data with the help of the data cache space.

In a specific application scenario, the solid state drive garbage collection acceleration device can determine the buffer code corresponding to the target read command in the process of determining the storage address of the target read command in the data cache space. number; the product of the buffer number and the buffer size is determined as the storage address, so as to quickly determine the storage address; wherein the buffer includes the storage space obtained by equally dividing the data cache space. For ease of understanding, assuming that the data cache space is divided into bufs of the same size, each buf is assigned a unique buf_id, that is, the buffer number, then the corresponding storage address can be quickly calculated through buf_id = buf_id*size.

In a specific application scenario, after transmitting the target read command to the SSD main controller, the solid-state drive garbage collection acceleration device can also record the target read command and target data, so as to determine whether all target data have been read completely based on the recorded information.

In specific application scenarios, in order to improve the working capacity of the data cache space, the solid-state drive garbage collection acceleration device can also release the corresponding storage space of the storage address in the data cache space after transmitting the target write command to the SSD main controller, so that the data cache space can be prepared for the next data storage.

Please refer to FIG. 10 , which is a schematic diagram of the structure of a solid state drive garbage collection system provided in an embodiment of the present application.

An embodiment of the present application provides a solid state hard disk garbage collection acceleration device, which may include:

The receiving port 101 is used to receive a target GC command sent by the GC management software of the target solid state drive;

The command builder 102 is used to generate a target read command corresponding to the SSD master controller of the target solid state drive based on the target GC command; transmit the target read command to the SSD master controller so that the SSD master controller reads the corresponding target data from the first flash memory block based on the target read command; generate a target write command corresponding to the SSD master controller based on the target GC command; transmit the target write command to the SSD master controller so that the SSD master controller writes the target data into the second flash memory block based on the target write command.

An embodiment of the present application provides a solid state hard disk garbage collection acceleration device, and a command builder may include:

A first acquisition module is used to acquire a pre-stored command template of the SSD master controller, where the command template includes a fixed field and a parameter field;

A first extraction module, used to extract a read command parameter field in a target GC command;

The first replacement module is used to replace the parameter field in the command template with the read command parameter field. Replace and get the target read command.

The solid state drive garbage collection acceleration device provided in the embodiment of the present application may also include:

A first determination module is used to determine the storage address of the target read command in the data cache space after the command builder transmits the target read command to the SSD master controller;

The second acquisition module is used to acquire the target data read by the SSD main controller, and cache the target data into the data cache space according to the storage address.

An embodiment of the present application provides a solid-state hard disk garbage collection acceleration device, in which the first determination module can be specifically used to: determine the buffer number corresponding to the target read command; determine the product value of the buffer number and the buffer size as the storage address; wherein the buffer includes the storage space obtained by evenly dividing the data cache space.

The first recording module is used to record the target read command and target data after the command builder transmits the target read command to the SSD master controller.

The first release module is used to release the corresponding storage space of the storage address in the data cache space after the command builder transmits the target write command to the SSD main controller.

The first generation module is used to generate a target GC response instruction corresponding to the target GC command after the command builder transmits the target write command to the SSD main controller, and transmit the target GC response instruction to the GC management software.

It should be noted that the specific structure of the solid state drive garbage collection acceleration device in the present application can be flexibly determined according to actual needs. For example, in one embodiment, the interaction process between the solid state drive garbage collection acceleration device and the GC management software and the SSD main controller can be shown as 11, including the following steps:

The command building module first receives the gc_sq sent by the GC management software;

The command construction module applies for buf id from the data cache management module;

The command building module notifies the read command status recording module of the applied buf id, and the read command status recording module records the buf id;

The command construction module reads the command and opcode from the command template, constructs the read command and sends it to the SSD controller;

The SSD master controller parses the command, reads valid data from the nand and transmits it to the universal solid state drive garbage collection acceleration device;

After receiving the read command data, the read command status recording module writes the data to the data cache address corresponding to buf_id;

The read command status recording module determines whether all the read command data has been written to the data cache. If all the data has been written to the data cache, the driving command construction module generates an SSD controller write command;

The command construction module reads the write command template and opcode from the command template, constructs the write command and sends it to the SSD master;

The SSD master controller parses the command and requests data from the general GC acceleration module;

The read command status recording module receives the data request, reads the data from the cache address corresponding to buf_id and transmits it to the SSD, and releases buf_id to the data cache management module;

After receiving the data, the SSD master controller writes it to the new location of the nand and notifies the general GC acceleration module that the write command has been executed;

The solid state drive garbage collection acceleration device returns the software gc_cq to notify the GC management software that the gc command is completed.

The present application also provides an electronic device and a computer-readable storage medium, both of which have the corresponding effects of an electronic method provided in an embodiment of the present application. Please refer to Figure 12, which is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

An electronic device provided in an embodiment of the present application includes a memory 201 and a processor 202. The memory 201 stores a computer program. When the processor 202 executes the computer program, the following steps are implemented:

Based on the target GC command, generate a target read command corresponding to the SSD master controller of the target solid state drive;

Transmitting a target read command to the SSD master controller, so that the SSD master controller reads corresponding target data from the first flash memory block based on the target read command;

Based on the target GC command, generate a target write command corresponding to the SSD master controller;

An electronic device provided in an embodiment of the present application includes a memory 201 and a processor 202. The memory 201 stores a computer program, and the processor 202 implements the following steps when executing the computer program: obtaining a pre-stored command template of the SSD master controller, the command template including a fixed field and a parameter field; extracting a read command parameter field in a target GC command; replacing the parameter field in the command template with the read command parameter field to obtain a target read command.

An electronic device provided in an embodiment of the present application includes a memory 201 and a processor 202. A computer program is stored in the memory 201. When the processor 202 executes the computer program, the following steps are implemented: after transmitting a target read command to an SSD master controller, a storage address of the target read command in a data cache space is determined; target data read by the SSD master controller is obtained, and the target data is cached in the data cache space according to the storage address.

An electronic device provided in an embodiment of the present application includes a memory 201 and a processor 202, wherein a computer program is stored in the memory 201, and the processor 202 implements the following steps when executing the computer program: determining a buffer number corresponding to a target read command; determining the product value of the buffer number and the buffer size as a storage address; wherein the buffer includes a storage space obtained by evenly dividing the data cache space.

An electronic device provided in an embodiment of the present application includes a memory 201 and a processor 202. The memory 201 stores a computer program. When the processor 202 executes the computer program, the following steps are implemented: after transmitting a target read command to an SSD main controller, the target read command and target data are recorded.

An electronic device provided in an embodiment of the present application includes a memory 201 and a processor 202. The memory 201 stores a computer program. When the processor 202 executes the computer program, the following steps are implemented: after transmitting the target write command to the SSD main controller, the corresponding storage space of the storage address in the data cache space is released.

An electronic device provided in an embodiment of the present application includes a memory 201 and a processor 202. A computer program is stored in the memory 201. When the processor 202 executes the computer program, the following steps are implemented: after transmitting the target write command to the SSD main controller, a target GC response instruction corresponding to the target GC command is generated, and the target GC response instruction is transmitted to the GC management software.

Please refer to FIG. 13 , another electronic device provided in the embodiment of the present application may further include: an input port 203 connected to the processor 202, used to transmit commands input from the outside to the processor 202; a display unit 204 connected to the processor 202, used to display the processing results of the processor 202 to the outside; and a communication module 205 connected to the processor 202, used to realize communication between the electronic device and the outside. Display unit Element 204 can be a display panel, a laser scanning display, etc.; the communication method adopted by the communication module 205 includes but is not limited to mobile high-definition link technology (HML), universal serial bus (USB), high-definition multimedia interface (HDMI), wireless connection: wireless fidelity technology (WiFi), Bluetooth communication technology, low-power Bluetooth communication technology, and communication technology based on IEEE802.11s.

An embodiment of the present application provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

An embodiment of the present application provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented: obtaining a pre-stored command template of an SSD master controller, the command template including a fixed field and a parameter field; extracting a read command parameter field in a target GC command; replacing the parameter field in the command template with the read command parameter field to obtain a target read command.

An embodiment of the present application provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented: after transmitting a target read command to an SSD master controller, determining a storage address of the target read command in a data cache space; obtaining target data read by the SSD master controller, and caching the target data into the data cache space according to the storage address.

An embodiment of the present application provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented: determining a buffer number corresponding to a target read command; determining the product value of the buffer number and the buffer size as a storage address; wherein the buffer includes a storage space obtained by evenly dividing the data cache space.

A computer-readable storage medium provided in an embodiment of the present application, a computer-readable storage medium A computer program is stored in the memory, and when the computer program is executed by the processor, the following steps are implemented: after transmitting the target read command to the SSD main controller, the target read command and the target data are recorded.

An embodiment of the present application provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented: after transmitting a target write command to an SSD master controller, the corresponding storage space of the storage address in the data cache space is released.

An embodiment of the present application provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented: after transmitting a target write command to an SSD master controller, a target GC response instruction corresponding to the target GC command is generated, and the target GC response instruction is transmitted to the GC management software.

The computer-readable storage medium involved in the present application includes random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disks, removable disks, CD-ROMs, or any other form of storage medium known in the technical field.

For the description of the relevant parts of the solid-state hard disk garbage collection device, electronic device, and computer-readable storage medium provided in the embodiments of the present application, please refer to the detailed description of the corresponding parts of the solid-state hard disk garbage collection method provided in the embodiments of the present application, which will not be repeated here. In addition, the parts of the above-mentioned technical solutions provided in the embodiments of the present application that are consistent with the implementation principles of the corresponding technical solutions in the prior art are not described in detail to avoid excessive elaboration.

In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

Professionals may further realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the above description has generally described the composition and steps of each example according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation is not limited to the following: It should not be regarded as exceeding the scope of the present application.

The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

The above is a detailed introduction to the solid-state hard drive garbage collection solution provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, according to the idea of the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

A solid state drive garbage collection method, characterized in that it is applied to a solid state drive garbage collection acceleration device, comprising:

Receive a target GC command sent by the GC management software of the target solid state drive;

Based on the target GC command, generating a target read command corresponding to the SSD master controller of the target solid state drive;

Transmitting the target read command to the SSD master controller, so that the SSD master controller reads corresponding target data from the first flash memory block based on the target read command;

Based on the target GC command, generating a target write command corresponding to the SSD master controller;

The target write command is transmitted to the SSD master controller, so that the SSD master controller writes the target data into the second flash memory block based on the target write command.
The method according to claim 1, characterized in that the generating, based on the target GC command, a target read command corresponding to the SSD master controller of the target solid state drive comprises:

Acquire a pre-stored command template of the SSD master controller, wherein the command template includes a fixed field and a parameter field;

Extracting a read command parameter field in the target GC command;

The parameter field in the command template is replaced with the read command parameter field to obtain the target read command.
The method according to claim 1, characterized in that after transmitting the target read command to the SSD master controller, it also includes:

Determining a storage address of the target read command in the data cache space;

The target data read by the SSD master controller is acquired, and the target data is cached in the data cache space according to the storage address.
The method according to claim 3, characterized in that determining the storage address of the target read command in the data cache space comprises:

Determine the buffer number corresponding to the target read command;

Determine the product value of the buffer zone number and the buffer zone size as the storage address;

The buffer area includes a storage space obtained by evenly dividing the data cache space.
The method according to claim 3, characterized in that the transmission of the target read command After the command is sent to the SSD master controller, it also includes:

The target read command and the target data are recorded.
The method according to claim 3, characterized in that after transmitting the target write command to the SSD master controller, it also includes:

The storage space corresponding to the storage address in the data cache space is released.
The method according to any one of claims 1 to 6, characterized in that after transmitting the target write command to the SSD master controller, it also includes:

A target GC response instruction corresponding to the target GC command is generated, and the target GC response instruction is transmitted to the GC management software.
A solid state hard disk garbage collection acceleration device, characterized by comprising:

A receiving port, used to receive a target GC command sent by the GC management software of the target solid state drive;

A command builder is used to generate a target read command corresponding to the SSD master controller of the target solid state drive based on the target GC command; transmit the target read command to the SSD master controller so that the SSD master controller reads the corresponding target data from the first flash memory block based on the target read command; generate a target write command corresponding to the SSD master controller based on the target GC command; transmit the target write command to the SSD master controller so that the SSD master controller writes the target data into the second flash memory block based on the target write command.
An electronic device, comprising:

Memory for storing computer programs;

A processor, configured to implement the steps of the solid state drive garbage collection method as described in any one of claims 1 to 7 when executing the computer program.
A computer-readable storage medium, characterized in that a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the solid-state hard disk garbage collection method as described in any one of claims 1 to 7 are implemented.