WO2021062982A1

WO2021062982A1 - Method and apparatus for managing hmb memory, and computer device and storage medium

Info

Publication number: WO2021062982A1
Application number: PCT/CN2020/076957
Authority: WO
Inventors: 吴娴; 韩道静; 王庆
Original assignee: 深圳忆联信息系统有限公司
Priority date: 2019-09-30
Filing date: 2020-02-27
Publication date: 2021-04-08
Also published as: CN110737607B; CN110737607A

Abstract

Disclosed are a method and apparatus for managing an HMB memory, and a computer device and a storage medium. The method comprises: acquiring a mapping unit to be written in a complete mapping table, so as to obtain attribute information of the mapping unit (S110); according to the attribute information, screening out a management unit having the same offset as the mapping unit, so as to obtain an initial set (S120); determining whether there is an idle management unit in the initial set (S130); if so, selecting the idle management unit, so as to obtain a target management unit (S140); if not, acquiring a management unit with the maximum Age value to serve as a target management unit (S150); writing the attribute information of the mapping unit into the target management unit, so as to form management information (S160); and according to the management information, writing the mapping unit into a segment memory space, having the same offset, in an HMB (S180). An HMB is divided into a plurality of segments to correspondingly store mapping units having the same offset, such that the hot data hit rate of the HMB is greatly increased, thereby also increasing the utilization rate of the HMB.

Description

Method, device, computer equipment and storage medium for managing HMB memory

This application claims the priority of the Chinese patent application filed at the Chinese Patent Office on September 30, 2019, with the application number 201910947374.7 and the invention title "Methods, devices, computer equipment and storage media for managing HMB memory", all of which The content is incorporated in this application by reference.

Technical field

This application relates to the technical field of solid-state hard disks, and in particular to a method, device, computer equipment, and storage medium for managing HMB memory.

Background technique

The NVMe (Non Volatile Memory Express) protocol defines the HMB (Host Memory Buffer, host memory buffer) function, which means that the solid state drive (SSD) that supports the NVMe protocol can use the host memory (DRAM) specially allocated to the solid state drive by the host. Solid-state hard drives do not need to be equipped with DRAM, which can greatly reduce cost and power consumption.

The solid-state drive master control that supports the HMB function can obtain the right to use part of the host memory. The size of the host’s memory is negotiated between the host and the solid-state drive according to their respective capabilities, and is not fixed. Here we assume that the HMB size is 256MB, which is used to cache the temporary mapping table. For a 1TG SSD, this part of the memory can only cache part of the mapping table. The complete mapping table still needs to be stored in the flash memory, and the SSD master is responsible for management. The temporary mapping table in the HMB, and the solid-state drive firmware is responsible for managing the complete mapping table in the flash memory.

When the host initiates a read command, the master first judges whether the mapping information of each LBA is in the HMB according to the management information. If so, it reads the mapping information (data) from the HMB to the SSD master through the PCIe bus. The third-generation PCIe bus can provide a bus bandwidth of 1GB/s. It only takes 4us to transfer 4KB of data. The speed is quite fast. If the mapping information is not in the HMB, the SSD master can only read the mapping information from the SSD flash memory, and read a physical The page time is about 80us, which is relatively slow. After that, the mapping information needs to be cached in the HMB because it is Hot (frequently updated data).

The existing master control design has proposed a method to manage the HMB memory. According to the HMB size, the complete mapping table in the SSD is divided into n segments (segment), n = complete mapping table size/HMB size, the master cache ( SRAM) allocates management information for each 4KB memory in HMB. Those 4KB mapping units with the same offset in different segments in the complete mapping table compete for the management unit with offset of offset in master SRAM and 4KB with offset of offset in HMB. Memory, and the implementation of the competition principle of new data overwriting old data. As shown in Figure 1, in this example, n=3, it can be seen that the size of each segment is equal to the HMB size. We define the offset for each 4KB particle in the segment. In this example, the maximum offset is 3(0 ~3).

When a new 4KB mapping unit needs to be stored in the HMB, the controller stores the segment_idx and offset_idx of the 4KB mapping unit provided by the firmware in the management information with an offset equal to offset_idx, and transfers the 4KB mapping unit data to the offset in the HMB 4KB of host memory for offset_idx, and then set the valid position as valid.

In order to pursue the ultimate query efficiency, the prior art method for managing HMB memory allows the mapping units of the same offset in all segments to compete for a management unit in the master control (corresponding to the 4KB memory space in a HMB), which is easy to lose heat. data. For example, the five hot data written [segment0, offset0], [segment0, offset2], [segment1, offset0], [segment2, offset0], [segment1, offset2], finally cached in the HMB only [segment2, offset0] With [segment1, offset2], the other three pieces of data are lost, and the utilization rate of HMB is low, which causes a waste of HMB resources.

Summary of the invention

technical problem

One of the objectives of the embodiments of the present application is to provide a method, device, computer equipment, and storage medium for managing HMB memory, so as to solve the problem of low utilization rate of HMB.

The solution to the problem

Technical solutions

In order to solve the above technical problems, the technical solutions adopted in the embodiments of this application are:

In the first aspect, a method for managing HMB memory is provided, including:

Acquiring the mapping unit to be written in the complete mapping table to obtain attribute information of the mapping unit;

According to the attribute information, filter the management units with the same offset as the mapping unit to obtain the initial set;

Determine whether there are idle management units in the initial set;

If there are idle management units, select the idle management units to obtain the target management unit;

If there is no idle management unit, the management unit with the largest Age value is acquired as the target management unit;

Write the attribute information of the mapping unit into the target management unit to form management information;

Set the Valid value of the target management unit to 1, and the Age value to 0, and set the Age value of other management units in the initial set except the target management unit plus 1;

According to the management information, the mapping unit is written into the segmented memory space with the same offset in the HMB.

In the second aspect, a device for managing HMB memory is provided, including:

The attribute obtaining unit is used to obtain the mapping unit to be written in the complete mapping table to obtain the attribute information of the mapping unit;

Filter the collection unit, and filter the management units with the same offset as the mapping unit according to the attribute information to obtain the initial collection;

The idle judging unit is used to judge whether there are idle management units in the initial set. If there are idle management units, select the idle management units to obtain the target management unit. If there are no idle management units, get the maximum Age value The management unit as the target management unit;

The information writing unit is used to write the attribute information of the mapping unit into the target management unit to form management information;

The assignment unit is used to set the Valid value of the target management unit to 1, and the Age value to 0, and to set the Age value of other management units in the initial set except the target management unit plus 1;

The mapping writing unit is used to write the mapping unit into the segmented memory space with the same offset in the HMB according to the management information.

In a third aspect, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor. The processor implements the management HMB described in the first aspect when the processor executes the computer program. The steps of the memory method.

In a fourth aspect, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, it implements the steps of the method for managing HMB memory in the first aspect.

The beneficial effects of the method, device, computer equipment, and storage medium for managing HMB memory provided by the embodiments of this application are: this application divides the HMB into multiple segments, corresponding to the mapping unit storing the same offset, greatly increasing the HMB Hot data hit rate, thereby increasing the utilization rate of HMB; mapping the management unit with the same offset in the main control to the continuous physical address segment of SRAM, with the parallel implementation of the hardware circuit, shortening the query time and improving the efficiency of data query.

The beneficial effects of the invention

Brief description of the drawings

Description of the drawings

Figure 1 is an application schematic diagram of the existing method for managing HMB memory;

2 is a schematic flowchart of a method for managing HMB memory provided by an embodiment of the application;

3 is a schematic diagram of the HMB setting sub-flow of a method for managing HMB memory provided by an embodiment of the application;

4 is a schematic diagram of a mapping unit reading sub-process of a method for managing HMB memory provided by an embodiment of the application;

FIG. 5 is a schematic flowchart of a method for managing HMB memory according to another embodiment of the application;

FIG. 6 is an application principle diagram of a method for managing HMB memory provided by an embodiment of the application;

FIG. 7 is an application principle diagram of a method for managing HMB memory provided by an embodiment of the application;

FIG. 8 is a schematic block diagram of a device for managing HMB memory provided by an embodiment of the application;

9 is a schematic block diagram of an HMB setting unit of an apparatus for managing HMB memory provided by an embodiment of the application;

FIG. 10 is a schematic block diagram of a device for managing HMB memory provided by another embodiment of this application;

FIG. 11 is a schematic block diagram of a data reading unit of a device for managing HMB memory provided by another embodiment of the application; FIG.

FIG. 12 is a schematic block diagram of a computer device provided by an embodiment of this application.

Invention embodiment

Embodiments of the present invention

FIG. 2 is a schematic flowchart of a method for managing HMB memory provided by an embodiment of the application. The method for managing HMB memory is applied to SSD, and the SSD performs data interaction with the host.

FIG. 2 is a schematic flowchart of a method for managing HMB memory provided by an embodiment of the present application. As shown in Figure 2, the method includes the following steps S110 to S180.

S110: Obtain the mapping unit to be written in the complete mapping table to obtain attribute information of the mapping unit.

In this embodiment, the complete mapping table can be divided into multiple mapping units. Each mapping unit has a size of KB, and each mapping unit is written with corresponding attribute information. The attribute information includes offset information and subdivision information. For example, the mapping unit [segment_x, offset_y] represents the offset information as offset_y, and the subordinate segment information is segment_x. The attribute information of the mapping unit includes offset information offset_y and subordinate segment information as segment_x.

FIG. 3 is a schematic flowchart of the HMB setting sub-process. Referring to FIG. 3, a method for managing HMB memory in this embodiment further includes an HMB setting process before step S110, and the HMB setting process includes steps S210-S250.

S210: Apply to the host to allocate a memory space as an HMB for storing the mapping unit.

In this embodiment, the SSD initially applies for a part of the memory space from the host to be used as HMB (Host Memory Buffer), so that the SSD (Solid State Drive) that supports the NVMe protocol can use the host memory (DRAM) requested from the host. Solid-state hard drives do not need to be equipped with DRAM by themselves, which can greatly reduce cost and power consumption.

S220: Divide the HMB into N segments to obtain the segment size.

S230. According to the size of the segment, the complete mapping table in the flash memory is equally divided into M segments, and the sizes of the segments and the segments are equal.

S240. The segment is divided into S segmented memory spaces, and the segment is divided into S mapping units, and the size of the segmented memory space and the mapping unit are equal.

In this embodiment, for steps S220-S240, it is different from the prior art that the complete mapping table on the flash memory is cut into n segments according to the entire HMB size, where n=complete mapping table size/HMB size. This application first divides the entire HMB into N segments (SET), and then divides the complete mapping table according to the segment size to obtain M segments, and further divides the segments into S segments The memory space is divided into S mapping units. The segmented memory space and the mapping unit have the same size. In this embodiment, the segmented memory space and the mapping unit are both 4KB in size.

As shown in Figure 6, the size of HMB in this example is 24KB, N=3, HMB is divided into 3 segments, each segment has a size of 8KB, and each segment contains two 4KB segment memory spaces. HMB includes a total of 6 segmented memory spaces; the size of the complete mapping table is 48KB, divided into 6 segments according to the segment size of 8KB, M=6, each segment is 8KB, and each segment includes 2 4KB There are 12 mapping units in total. The SRAM of the SSD master control has 6 management units corresponding to the associated management of 6 segmented memory spaces. The management unit is used to store the attribute information of the mapping unit written into the segmented memory space as Management information, including segment value and offset value.

S250: Define that the mapping unit is stored in the segmented memory space with the same offset, and the attribute information of the mapping unit is stored as management information in the target management unit with the same offset.

In this embodiment, the size of the mapping unit and the segmented memory space are both 4KB, and this application defines that mapping units with the same offset can be stored in the segmented memory space with the same offset. Specifically, M mapping units with offset=x in the complete mapping table can compete together and are finally stored in the segmented memory space with N offset=x, which is compared with the mapping with multiple offset=x in the prior art. Units compete for a segmented memory space with offset=x. This solution can store multiple mapping units with the same offset at the same time, making better use of HMB memory space and improving the hit rate of HMB usage.

As shown in Figure 6, the mapping unit of offset=x in the 6 segments divided by the complete mapping table competes for the memory space of offset=x in the 3 SETs in the HMB. Here, the value of x is 0 or 1, so , HMB can store N(3) mapping units with the same offset=x. Specifically, the aforementioned N, M, and S all represent natural numbers greater than zero.

S120. According to the attribute information, filter management units with the same offset as the mapping unit to obtain an initial set.

In this embodiment, according to the obtained attribute information, the offset information in the attribute information is obtained, all management units with the same offset are filtered out according to the offset information, and all the management units are used as the initial set for further checking The management unit in the initial set judges and determines the target management unit for writing management information.

S130: Determine whether there is an idle management unit in the initial set.

S140: If there are idle management units, select the idle management units to obtain the target management unit.

S150: If there is no idle management unit, acquire the management unit with the largest Age value as the target management unit.

In this embodiment, the initial set contains management units with the same offset attribute. Before the mapping unit writes the segmented memory space corresponding to the offset according to the offset, it needs to determine whether there is free segmented memory space. It is available for writing, so it is necessary to determine whether there is an idle management unit in the initial set. There are two situations at this time. One is that there is an idle management unit, which means there is a segmented memory space that has not been written into the mapping unit. The mapping unit can be directly written into the corresponding segmented memory space, and the idle management unit needs to be further selected to obtain Target management unit; the other is that there is no idle management unit, and a segmented memory space that has been written with a mapping unit needs to be eliminated and written into a new mapping unit. At this time, the management unit with the largest Age value needs to be obtained as the target Management unit.

Specifically, this application adopts the LRU (Least Recently Used) algorithm to introduce the Age value in the management unit, and the Age value represents the new and old data in the corresponding segmented memory space, and the value is 0, 1...N -1, the smaller the value, the newer the data. Each management unit carries the Age value. The management unit with the largest Age value (N-1) in the initial set is the oldest management unit, which is used as The target management unit eliminates data and writes it into a new mapping unit.

S160. Write the attribute information of the mapping unit into the target management unit to form management information.

In this embodiment, the attribute information is written into the target management unit to form management information, which is used to subsequently query the corresponding mapping unit according to the attribute information and download the corresponding mapping data.

S170: Set the Valid value of the target management unit to 1, and the Age value to 0, and set the Age value of other management units in the initial set except the target management unit plus 1.

In this embodiment, Valid indicates whether the management information is valid, a Valid value of 1 represents that the management information of the management unit is valid, a Valid value of 0 represents that the management information of the management unit is invalid, and the Valid value of the target management unit is set to 1. It means that the management information in the management unit is effective. Set the Age value of the newly written mapping unit to 0, and add 1 to the Age value of other management units in the initial set except the target management unit, that is, every time a new mapping unit is written, the rest will not be The Age value in the eliminated management unit is correspondingly increased by 1, ensuring that the Age value corresponding to the management unit corresponding to the mapping unit written first is always greater than the Age value corresponding to the management unit corresponding to the mapping unit written later, so that the Age value can be passed To filter out the oldest management unit and eliminate it.

For example, the firmware writes [segment0, offset0], [segment0, offset1], [segment1, offset0], [segment2, offset0], [segment1, offset1] five mapping units, according to the above write and elimination rules, finally The three hot data with offset=0 are all cached in the HMB. Assuming that the subsequent firmware writes the mapping unit [segment5, offset0], the management unit #1 will be eliminated according to the elimination rule, as shown in Figure 6.

S180. Write the mapping unit into the segmented memory space with the same offset in the HMB according to the management information.

In this embodiment, according to the offset information in the management information, the mapping unit is written into the segmented memory space with the same offset in the HMB. For example, all mapping units with offset=0 are written in offset=0. Segment the memory space to ensure that multiple mapping units with the same offset can be stored, make better use of the HMB memory space, and improve the hit rate of HMB usage.

Referring to FIG. 5, in an embodiment, step S190 is further included after step S180.

S190. Store the management units belonging to the same initial collection in an SRAM segment with consecutive physical addresses.

In one embodiment, since the HMB is divided into multiple segments, the main control needs to query multiple SRAM address segments when querying the management unit, which will slightly increase the query time. As shown in Figure 7, this application stores the management units belonging to the same initial collection in the SRAM segment with continuous physical addresses. When the hardware circuit of the main control query algorithm is implemented, the SRAM query can be started only once (start address Add the query length), which can effectively shorten the query time and improve the query efficiency.

Figure 4 is a schematic flow chart of the mapping unit reading sub-process, referring to Figure 4, a method for managing HMB memory in this embodiment, after step S180, also includes a mapping information (data) reading process, mapping information (data) reading The fetching process includes steps S310-S340.

S310. Obtain a mapping unit read command.

S320: Parse the mapping unit read command to obtain attribute information of the mapping unit to be read.

S330: Query the management unit according to the attribute information to obtain management units with the same attribute information.

S340: Read the mapping unit data of the corresponding position on the HMB according to the management information of the management unit.

In one embodiment, when reading the mapping unit data, the mapping unit read command is obtained, the mapping unit read command is parsed to obtain the attribute information of the mapping unit to be read, and the management unit is queried according to the attribute information to obtain The management unit with the same attribute information reads the mapping unit data of the corresponding position on the HMB according to the management information of the management unit.

For example, to query whether the mapping unit [segment1, offset0] is in the HMB, the master directly queries whether there is a unit with segment = segment1 in the management unit with offset=0, and if there is a hit, the corresponding HMB data is sent to the firmware. Otherwise, there is a miss. In this example, the result is a hit to the #3 HMB memory. This application can greatly improve the HMB hit rate.

FIG. 8 is a schematic block diagram of a device for managing HMB memory provided by an embodiment of the present application. As shown in FIG. 8, corresponding to the above method for managing HMB memory, this application also provides a device for managing HMB memory. The device for managing HMB memory includes a unit for executing the above method for managing HMB memory, and the device can be configured in a desktop computer, a tablet computer, a laptop computer, and other terminals. Specifically, referring to FIG. 8, the device for managing HMB memory includes an attribute acquisition unit 10, a screening collection unit 20, an idle determination unit 30, an information writing unit 40, an assignment unit 50, a mapping writing unit 60, and an HMB setting unit 70.

The attribute obtaining unit 10 is used to obtain the mapping unit to be written in the complete mapping table to obtain the attribute information of the mapping unit.

The screening collection unit 20 screens management units with the same offset as the mapping unit according to the attribute information to obtain the initial collection.

The idle judging unit 30 is used to judge whether there are idle management units in the initial set. If there are idle management units, select the idle management units to obtain the target management unit; if there are no idle management units, obtain the Age value The largest management unit is used as the target management unit.

The information writing unit 40 is used to write the attribute information of the mapping unit into the target management unit to form management information.

The assignment unit 50 is used to set the Valid value of the target management unit to 1, and the Age value to 0, and to set the Age value of other management units in the initial set except the target management unit plus 1.

The mapping writing unit 60 is configured to write the mapping unit into the segmented memory space with the same offset in the HMB according to the management information.

Referring to FIG. 9, in this embodiment, an apparatus for managing HMB memory of the present application further includes an HMB setting unit 70. The HMB setting unit 70 includes a memory application subunit 71, a segmentation subunit 72, a segmentation subunit 73, and a switch. The molecular unit 74 and the definition subunit 75.

The memory application subunit 71 is used to apply to the host to allocate a memory space as an HMB for storing the mapping unit.

The segmentation subunit 72 is used to divide the HMB into N segments to obtain the segment size.

The division subunit 73 is configured to divide the complete mapping table in the flash memory into M divisions according to the size of the division, and the divisions and divisions have the same size.

The molecular cutting unit 74 divides the segment into S segmented memory spaces, and divides the segment into S mapping units, and the size of the segmented memory space and the mapping unit are equal.

The definition subunit 75 is used to define that the mapping unit is stored in the segmented memory space with the same offset, and the attribute information of the mapping unit is stored as management information in the target management unit with the same offset.

Specifically, the aforementioned N, M, and S all represent natural numbers greater than zero.

FIG. 10 is a schematic block diagram of a device for managing HMB memory provided by another embodiment of the present application. As shown in FIG. 10, the device for managing HMB memory in this embodiment is based on the above embodiment with an address adjustment unit 80 and a data reading unit 90 added.

The address adjustment unit 80 is used to store the management units belonging to the same initial collection in an SRAM segment with consecutive physical addresses.

As shown in FIG. 11, the data reading unit 90 includes a command acquisition subunit 91, an attribute analysis subunit 92, an attribute query subunit 93 and a data reading subunit 94.

The command obtaining subunit 91 is used to obtain a reading command of the mapping unit.

The attribute analysis subunit 92 is used to parse the mapping unit read command to obtain the attribute information of the mapping unit to be read.

The attribute query subunit 93 is used to query the management units according to the attribute information to obtain management units with the same attribute information.

The data reading subunit 94 is used to read the mapping unit data of the corresponding position on the HMB according to the management information of the management unit.

It should be noted that, for the specific implementation process of the foregoing device for managing the HMB memory and each unit, reference may be made to the corresponding description in the foregoing method embodiment, which will not be repeated here.

Please refer to FIG. 12, which is a schematic block diagram of a computer device according to an embodiment of the present application. The computer device 500 may be a terminal or a server, where the terminal may be an electronic device with communication functions such as a smart phone, a tablet computer, a notebook computer, a desktop computer, a personal digital assistant, and a wearable device. The server can be an independent server or a server cluster composed of multiple servers.

Referring to FIG. 12, the computer device 500 includes a processor 502, a memory, and a network interface 505 connected through a system bus 501, where the memory may include a non-volatile storage medium 503 and an internal memory 504.

The non-volatile storage medium 503 can store an operating system 5031 and a computer program 5032. The computer program 5032 includes program instructions. When the program instructions are executed, the processor 502 can execute a method for managing HMB memory. The processor 502 is used to provide calculation and control capabilities to support the operation of the entire computer device 500. The internal memory 504 provides an environment for the operation of the computer program 5032 in the non-volatile storage medium 503. When the computer program 5032 is executed by the processor 502, the processor 502 can execute a method for managing HMB memory. The network interface 505 is used for network communication with other devices. Those skilled in the art can understand that the structure shown in FIG. 12 is only a block diagram of part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device 500 to which the solution of the present application is applied. The specific computer device 500 may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

Wherein, the processor 502 is configured to run a computer program 5032 stored in the memory.

It should be understood that in this embodiment of the application, the processor 502 may be a central processing unit (Central Processing Unit, CPU), and the processor 502 may also be other general-purpose processors, digital signal processors (Digital Signal Processors, DSPs), Application Specific Integrated Circuit (ASIC), Field-Programmable Gate Array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. Among them, the general-purpose processor may be a microprocessor or the processor may also be any conventional processor.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the foregoing embodiments can be implemented by computer programs instructing relevant hardware. The computer program includes program instructions, and the computer program can be stored in a storage medium, which is a computer-readable storage medium. The program instructions are executed by at least one processor in the computer system to implement the process steps of the foregoing method embodiments.

Therefore, this application also provides a storage medium. The storage medium may be a computer-readable storage medium. The storage medium may be a U disk, a mobile hard disk, a read-only memory (Read-Only Memory, ROM), a magnetic disk or an optical disk, and other computer-readable storage media that can store program codes.

A person of ordinary skill in the art may be aware that the units and algorithm steps of the examples described in the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of both, in order to clearly illustrate the hardware and software Interchangeability, in the above description, the composition and steps of each example have been generally described in accordance with the function. Whether these functions are performed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Anyone familiar with the technical field can easily think of various equivalents within the technical scope disclosed in this application. Modifications or replacements, these modifications or replacements shall be covered within the scope of protection of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A method for managing HMB memory, which is characterized in that it includes:

Acquiring the mapping unit to be written in the complete mapping table to obtain attribute information of the mapping unit;

According to the attribute information, filter the management units with the same offset as the mapping unit to obtain the initial set;

Determine whether there are idle management units in the initial set;

If there are idle management units, select the idle management units to obtain the target management unit;

If there is no idle management unit, the management unit with the largest Age value is acquired as the target management unit;

Write the attribute information of the mapping unit into the target management unit to form management information;

Set the Valid value of the target management unit to 1, and the Age value to 0, and set the Age value of other management units in the initial set except the target management unit plus 1;

According to the management information, the mapping unit is written into the segmented memory space with the same offset in the HMB.
The method for managing HMB memory according to claim 1, wherein before the step of obtaining the mapping unit to be written in the complete mapping table to obtain the attribute information of the mapping unit, the method further comprises:

Apply to the host to allocate a memory space as the HMB to store the mapping unit; divide the HMB into N segments to obtain the segment size;

According to the size of the segment, the complete mapping table in the flash memory is equally divided into M segments, and the size of the segment and the segment are equal;

Divide the segment into S segmented memory spaces, and divide the segment into S mapping units, and the size of the segmented memory space and the mapping unit are equal;

It is defined that the mapping unit is stored in the segmented memory space with the same offset, and the attribute information of the mapping unit is stored as management information in the target management unit with the same offset;

N, M, and S all represent natural numbers greater than zero.
The method for managing HMB memory according to claim 1, wherein after the step of writing the mapping unit into the segmented memory space with the same offset in the HMB according to the management information, the method further comprises:

Obtain the mapping unit read command;

Parse the mapping unit read command to obtain the attribute information of the mapping unit to be read;

Query the management unit according to the attribute information to obtain the management unit with the same attribute information;

Read the mapping unit data of the corresponding position on the HMB according to the management information of the management unit.
The method for managing HMB memory according to claim 1, wherein after the step of writing the mapping unit into the segmented memory space with the same offset in the HMB according to the management information, the method comprises:

Store the management units belonging to the same initial collection in the SRAM segment with consecutive physical addresses.
A device for managing HMB memory, characterized in that it comprises:

The attribute obtaining unit is used to obtain the mapping unit to be written in the complete mapping table to obtain the attribute information of the mapping unit;

Filter the collection unit, and filter the management units with the same offset as the mapping unit according to the attribute information to obtain the initial collection;

The idle judging unit is used to judge whether there are idle management units in the initial set. If there are idle management units, select the idle management units to obtain the target management unit. If there are no idle management units, get the maximum Age value The management unit as the target management unit;

The information writing unit is used to write the attribute information of the mapping unit into the target management unit to form management information;

The assignment unit is used to set the Valid value of the target management unit to 1, and the Age value to 0, and to set the Age value of other management units in the initial set except the target management unit plus 1;

The mapping writing unit is used to write the mapping unit into the segmented memory space with the same offset in the HMB according to the management information.
The device for managing HMB memory according to claim 5, further comprising an HMB setting unit, the HMB setting unit including a memory application subunit, a segmentation subunit, a segmentation subunit, a segmentation unit, and a definition Subunit

The memory application subunit is used to apply to the host to allocate a memory space as an HMB for storing the mapping unit;

The segmentation subunit is used to divide the HMB into N segments to obtain the segment size;

The division subunit is used to divide the complete mapping table in the flash memory into M divisions according to the division size, and the divisions and divisions have the same size;

In the molecular division unit, the segment is divided into S segmented memory spaces, and the segment is divided into S mapping units, and the size of the segmented memory space and the mapping unit are equal;

The definition subunit is used to define that the mapping unit is stored in the segmented memory space with the same offset, and the attribute information of the mapping unit is stored as management information in the target management unit with the same offset; N, M and S , Both represent natural numbers greater than 0.
The device for managing HMB memory according to claim 5, further comprising a data reading unit, the data reading unit comprising a command acquisition subunit, an attribute analysis subunit, an attribute query subunit, and a data reading subunit unit;

The command acquisition subunit is used to acquire the mapping unit read command;

The attribute analysis subunit is used to parse the mapping unit read command to obtain the attribute information of the mapping unit to be read;

The attribute query subunit is used to query the management unit according to the attribute information to obtain the management unit with the same attribute information;

The data reading subunit is used to read the mapping unit data of the corresponding position on the HMB according to the management information of the management unit.
The device for managing HMB memory according to claim 5, further comprising an address adjustment unit for storing management units belonging to the same initial collection in an SRAM segment with consecutive physical addresses.
A computer device comprising a memory, a processor, and a computer program stored on the memory and capable of running on the processor, wherein the processor implements the following steps when the processor executes the computer program:

Acquiring the mapping unit to be written in the complete mapping table to obtain attribute information of the mapping unit;

According to the attribute information, filter the management units with the same offset as the mapping unit to obtain the initial set;

Determine whether there are idle management units in the initial set;

If there are idle management units, select the idle management units to obtain the target management unit;

If there is no idle management unit, the management unit with the largest Age value is acquired as the target management unit;

Write the attribute information of the mapping unit into the target management unit to form management information;

Set the Valid value of the target management unit to 1, and the Age value to 0, and set the Age value of other management units in the initial set except the target management unit plus 1;

According to the management information, the mapping unit is written into the segmented memory space with the same offset in the HMB.
The computer device according to claim 9, wherein the processor further implements the following steps when executing the computer program:

Apply to the host to allocate a memory space as HMB to store the mapping unit;

Divide the HMB into N segments to obtain the segment size;

According to the size of the segment, the complete mapping table in the flash memory is equally divided into M segments, and the size of the segment and the segment are equal;

Divide the segment into S segmented memory spaces, and divide the segment into S mapping units, and the size of the segmented memory space and the mapping unit are equal;

It is defined that the mapping unit is stored in the segmented memory space with the same offset, and the attribute information of the mapping unit is stored as management information in the target management unit with the same offset; N, M, and S all represent natural numbers greater than 0.
The computer device according to claim 9, wherein the processor further implements the following steps when executing the computer program:

Obtain the mapping unit read command;

Parse the mapping unit read command to obtain the attribute information of the mapping unit to be read;

Query the management unit according to the attribute information to obtain the management unit with the same attribute information;

Read the mapping unit data of the corresponding position on the HMB according to the management information of the management unit.
The computer device according to claim 9, wherein the processor further implements the following steps when executing the computer program:

Store the management units belonging to the same initial collection in the SRAM segment with consecutive physical addresses.
A computer-readable storage medium having a computer program stored thereon, wherein the computer program is executed by a processor to implement the following steps:

Acquiring the mapping unit to be written in the complete mapping table to obtain attribute information of the mapping unit;

According to the attribute information, filter the management units with the same offset as the mapping unit to obtain the initial set;

Determine whether there are idle management units in the initial set;

If there are idle management units, select the idle management units to obtain the target management unit;

If there is no idle management unit, the management unit with the largest Age value is acquired as the target management unit;

Write the attribute information of the mapping unit into the target management unit to form management information;

Set the Valid value of the target management unit to 1, and the Age value to 0, and set the Age value of other management units in the initial set except the target management unit plus 1;

According to the management information, the mapping unit is written into the segmented memory space with the same offset in the HMB.
The computer-readable storage medium according to claim 13, wherein the computer program further implements the following steps when being executed by the processor:

Apply to the host to allocate a memory space as HMB to store the mapping unit;

Divide the HMB into N segments to obtain the segment size;

According to the size of the segment, the complete mapping table in the flash memory is equally divided into M segments, and the size of the segment and the segment are equal;

Divide the segment into S segmented memory spaces, and divide the segment into S mapping units, and the size of the segmented memory space and the mapping unit are equal;

It is defined that the mapping unit is stored in the segmented memory space with the same offset, and the attribute information of the mapping unit is stored as management information in the target management unit with the same offset; N, M, and S all represent natural numbers greater than 0.
The computer-readable storage medium according to claim 13, wherein the computer program further implements the following steps when being executed by the processor:

Obtain the mapping unit read command;

Parse the mapping unit read command to obtain the attribute information of the mapping unit to be read;

Query the management unit according to the attribute information to obtain the management unit with the same attribute information;

Read the mapping unit data of the corresponding position on the HMB according to the management information of the management unit.
The computer-readable storage medium according to claim 13, wherein the computer program further implements the following steps when being executed by the processor:

Store the management units belonging to the same initial collection in the SRAM segment with consecutive physical addresses.