CN112463041A - Processing method for host read-write data and related device - Google Patents
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- 239000000872 buffer Substances 0.000 claims abstract description 106
- 238000012545 processing Methods 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 30
- 238000004590 computer program Methods 0.000 claims description 10
- 230000000977 initiatory effect Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 4
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- 230000008569 process Effects 0.000 description 11
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- 238000012986 modification Methods 0.000 description 2
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- 238000013021 overheating Methods 0.000 description 2
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/061—Improving I/O performance
- G06F3/0611—Improving I/O performance in relation to response time
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0655—Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices
- G06F3/0656—Data buffering arrangements
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
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Abstract
The application discloses a processing method for host read-write data, which comprises the steps of receiving a read-write command and splitting the read-write command by taking the size of a basic unit of a SSD (solid state disk) accessed by a host as a unit; storing PRP entries of basic unit size of N hosts accessing SSD; n is an integer greater than 1; applying for a buffer to buffer data through the applied buffer; the size of the buffer is M times of the size of a basic unit of the SSD accessed by the host; m is an integer greater than 1. The method can effectively improve the read-write performance of the SSD and improve the read-write speed of the host. The application also discloses a processing device, equipment and a computer readable storage medium for the host to read and write data, which have the technical effects.
Description
Technical Field
The application relates to the technical field of computers, in particular to a processing method for reading and writing data of a host; also relates to a processing device, equipment and a computer readable storage medium for reading and writing data by the host.
Background
At present, a host accesses an SSD (Solid State Disk) through an LBA (Logical Block Address), after receiving a read-write command from the host, the SSD splits the read-write command in units of LBA PAGE SIZE, that is, the SIZE of a basic unit of the host accessing the SSD, and performs multiple read-write operations in units of the split SIZE, where one read operation or write operation can only process data of the LBA PAGE SIZE. Therefore, one processing flow includes a plurality of processing flows performed inside the SSD besides data interaction between the host and the SSD, and each processing flow basically involves switching of a state machine (the state machine is used for recording the state of current command operation). Frequent switching of the state machine increases the overhead of data processing, increases read-write delay, and further affects the overall read-write performance of the SSD and the read-write speed of the host.
In view of the above, how to increase the host read/write speed has become an urgent technical problem to be solved by those skilled in the art.
Disclosure of Invention
The application aims to provide a processing method for host read-write data, which effectively improves the read-write performance of SSD and improves the host read-write speed. Another object of the present application is to provide a device, an apparatus and a computer readable storage medium for memory temperature overheating alarm, all having the above technical effects.
In order to solve the above technical problem, the present application provides a method for processing read/write data of a host, including:
receiving a read-write command and splitting the read-write command by taking the size of a basic unit of the SSD accessed by a host as a unit;
storing PRP entries of basic unit size of N hosts accessing SSD; n is an integer greater than 1;
applying for a buffer to buffer data through the applied buffer; the size of the buffer is M times of the size of a basic unit of the SSD accessed by the host; m is an integer greater than 1.
Optionally, the method further includes:
when data is transferred, a plurality of DMA processing commands are simultaneously initiated, and the state machine is switched until the data in the buffer is transferred.
Optionally, the size of the buffer in the application is at least the size of N PRP entries.
Optionally, the number of the PRP entries is specifically 32, and the size of the buffer is 128K.
Optionally, the method further includes:
and recording the buffer position occupied by each logical block address through the buffer index.
In order to solve the above technical problem, the present application further provides a processing apparatus for reading and writing data by a host, including:
the read-write command splitting module is used for receiving the read-write command and splitting the read-write command by taking the size of a basic unit of the SSD accessed by the host as a unit;
a PRP entry storage module, configured to store N PRP entries with a size of a basic unit that the host accesses the SSD; n is an integer greater than 1;
the buffer application module is used for applying a buffer to buffer data through the applied buffer; the size of the buffer is M times of the size of a basic unit of the SSD accessed by the host; m is an integer greater than 1.
Optionally, the method further includes:
and the command initiating module is used for simultaneously initiating a plurality of DMA processing commands when data are transported, and switching the state machine until the data in the buffer are transported.
Optionally, the method further includes:
and the recording module is used for recording the buffer positions occupied by the logical block addresses through the buffer indexes.
In order to solve the above technical problem, the present application further provides a processing device for reading and writing data by a host, including:
a memory for storing a computer program;
and the processor is used for realizing the steps of the processing method for reading and writing data by the host when executing the computer program.
In order to solve the above technical problem, the present application further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the steps of the processing method for reading and writing data by a host according to any one of the above embodiments are implemented.
The processing method for the host read-write data provided by the application comprises the following steps: receiving a read-write command and splitting the read-write command by taking the size of a basic unit of the SSD accessed by a host as a unit; storing PRP entries of basic unit size of N hosts accessing SSD; n is an integer greater than 1; applying for a buffer to buffer data through the applied buffer; the size of the buffer is M times of the size of a basic unit of the SSD accessed by the host; m is an integer greater than 1.
Compared with the traditional technical scheme of only storing PRP entries with the size of the basic unit of the SSD accessed by one host at a time, the number of the PRP entries stored at one time is more than one, so that the number of times of obtaining the PRP entries can be reduced, and the overhead in the data processing process is reduced. In addition, compared with the traditional technical scheme of applying the buffer with the size of the basic unit for accessing the SSD by one host at a time, the size of the buffer applied by one time is larger than the size of the basic unit for accessing the SSD by one host, so that the times of sending messages to the buffer manager and the times of switching the state machine can be reduced, the overhead in the data processing process is reduced, and the purposes of improving the read-write performance of the SSD and improving the read-write speed of the host are achieved.
The processing device, the equipment and the computer readable storage medium for the host to read and write data have the technical effects.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the prior art and the embodiments are briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic flowchart of a processing method for reading and writing data by a host according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a processing apparatus for reading and writing data by a host according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of a processing device for reading and writing data by a host according to an embodiment of the present disclosure.
Detailed Description
The core of the application is to provide a processing method for host read-write data, which can effectively improve the read-write performance of SSD and improve the read-write speed of the host. At the other core of the application, the device, the equipment and the computer readable storage medium for alarming the memory temperature overheating are provided, and the technical effects are achieved.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, fig. 1 is a schematic flow chart of a processing method for reading and writing data by a host according to an embodiment of the present application, and referring to fig. 1, the method mainly includes the following steps:
s101: receiving a read-write command and splitting the read-write command by taking the size of a basic unit of the SSD accessed by a host as a unit;
specifically, the host accesses the SSD through the logical block address, and a DM (Data Manager) module of the SSD splits the received read/write command after receiving the read/write command of the host, and specifically splits the read/write command in units of the size of a basic unit of the SSD accessed by the host. Generally, the SIZE of the basic unit of the SSD, i.e., the SIZE of the LBA PAGE SIZE, is 4K, so the DM module of the SSD splits the read/write command by 4K.
S102: storing PRP entries of basic unit size of N hosts accessing SSD; n is an integer greater than 1;
specifically, after the SSD splits the read/write command, the PRP (Physical Region Page) entries of the basic unit size of the SSD accessed by the N hosts are saved in one processing flow. The PRP entry characterizes the address of the data to be written or read. Wherein N is an integer greater than 1. When the LBA PAGE SIZE is 4K, the number of PRP entries stored in one processing flow is N PRP entries having a SIZE of 4K.
S103: applying for a buffer to buffer data through the applied buffer; the size of the buffer is M times of the size of a basic unit of the SSD accessed by the host; m is an integer greater than 1.
Specifically, the present step is directed to applying for a buffer to buffer data through the applied buffer. Specifically, compared with the traditional technical scheme of applying a buffer with the SIZE of one LBA PAGE SIZE each time, the buffer applied once is M times the SIZE of the LBA PAGE SIZE when the buffer is applied; m is an integer greater than 1. In the case where the SIZE of LBA PAGE SIZE is 4K, the SIZE of buffer of one application is (4M) K. Therefore, the buffer is applied and the state machine is switched once without applying for every logical block address, the number of the applied buffers can be reduced, the times of sending messages to the buffer manager and the times of switching the state machine are reduced, and the overhead in the data processing process is reduced.
In a specific embodiment, the size of the buffer in the application is at least the size of N PRP entries.
Specifically, in this embodiment, the size of the buffer applied for one time is at least the size of the N PRP entries. That is, in the case where the LBA PAGE SIZE is 4K, the SIZE of the buffer of one application is at least equal to 4N.
Further, in a specific embodiment, the number of PRP entries is specifically 32, and the size of buffer is 128K.
Specifically, in this embodiment, the number of PRP entries stored in one processing flow is 32, that is, N is equal to 32, and the size of the buffer applied at one time is equal to 32 × 4 — 128K, that is, M is equal to 32, so that one buffer can store 32 logical fast addresses, and only one buffer needs to be applied for each 32 logical fast addresses. Therefore, the number of the applied buffers can be greatly reduced, the times of sending messages to the buffer manager and the times of switching the state machine are reduced, the overhead in the data processing process is reduced, and the reading and writing speed of the host is improved.
In addition, on the basis of the above embodiment, the method further includes: and recording the buffer position occupied by each logical block address through the buffer index.
Specifically, on the basis of applying for a larger buffer at a time, a buffer index is further set, and the buffer position occupied by each logical block address is recorded through the buffer index.
Further, on the basis of the above embodiment, the method further includes: when data is transferred, a plurality of DMA processing commands are simultaneously initiated, and the state machine is switched until the data in the buffer is transferred.
Specifically, the buffer is used for buffering data, and the data stored in the buffer needs to be further transferred to other storage devices. In order to further reduce the overhead in the data processing process, in this embodiment, when the DMA (Direct Memory Access) carries data, a plurality of DMA processing commands are simultaneously initiated, and after all the data in the buffer are carried, the state machine is switched, so that the number of times of sending messages to the DMA and the number of times of switching the state machine are reduced, and the overhead in the data processing process is reduced.
In summary, the processing method for host read/write data provided by the present application includes: receiving a read-write command and splitting the read-write command by taking the size of a basic unit of the SSD accessed by a host as a unit; storing PRP entries of basic unit size of N hosts accessing SSD; n is an integer greater than 1; applying for a buffer to buffer data through the applied buffer; the size of the buffer is M times of the size of a basic unit of the SSD accessed by the host; m is an integer greater than 1. Compared with the traditional technical scheme of only storing PRP entries with the size of the basic unit of the SSD accessed by one host at a time, the number of the PRP entries stored at one time is more than one, so that the number of times of obtaining the PRP entries can be reduced, and the overhead in the data processing process is reduced. In addition, compared with the traditional technical scheme of applying the buffer with the size of the basic unit for accessing the SSD by one host at a time, the size of the buffer applied by one time is larger than the size of the basic unit for accessing the SSD by one host, so that the times of sending messages to the buffer manager and the times of switching the state machine can be reduced, the overhead in the data processing process is reduced, and the purposes of improving the read-write performance of the SSD and improving the read-write speed of the host are achieved.
The present application also provides a processing device for reading and writing data by a host, and the device described below may be referred to in correspondence with the method described above. Referring to fig. 2, fig. 2 is a schematic diagram of a processing apparatus for reading and writing data by a host according to an embodiment of the present disclosure, and referring to fig. 2, the apparatus includes:
a read-write command splitting module 10, configured to receive a read-write command and split the read-write command by using the size of a basic unit of an SSD accessed by a host as a unit;
a PRP entry storage module 20, configured to store PRP entries of the basic unit size of N SSDs accessed by the hosts; n is an integer greater than 1;
a buffer application module 30, configured to apply for a buffer to buffer data through the applied buffer; the size of the buffer is M times of the size of a basic unit of the SSD accessed by the host; m is an integer greater than 1.
On the basis of the above embodiment, as a specific implementation manner, the method further includes:
and the command initiating module is used for simultaneously initiating a plurality of DMA processing commands when data are transported, and switching the state machine until the data in the buffer are transported.
On the basis of the foregoing embodiment, as a specific implementation manner, the size of the buffer in the application is at least the size of N PRP entries.
On the basis of the foregoing embodiment, as a specific implementation manner, the number of the PRP entries is specifically 32, and the size of the buffer is 128K.
On the basis of the above embodiment, as a specific implementation manner, the method further includes:
and the recording module is used for recording the buffer positions occupied by the logical block addresses through the buffer indexes.
Compared with the traditional technical scheme that only one PRP entry with the size of the basic unit for accessing the SSD by the host is stored at one time, the number of the PRP entries stored at one time is more than one, so that the number of times of obtaining the PRP entries can be reduced, and the overhead in the data processing process is reduced. In addition, compared with the traditional technical scheme of applying the buffer with the size of the basic unit for accessing the SSD by one host at a time, the size of the buffer applied by one time is larger than the size of the basic unit for accessing the SSD by one host, so that the times of sending messages to the buffer manager and the times of switching the state machine can be reduced, the overhead in the data processing process is reduced, and the purposes of improving the read-write performance of the SSD and improving the read-write speed of the host are achieved.
The present application also provides a processing device for reading and writing data by a host, which is shown in fig. 3 and includes a memory 1 and a processor 2.
A memory 1 for storing a computer program;
a processor 2 for executing a computer program to implement the steps of:
receiving a read-write command and splitting the read-write command by taking the size of a basic unit of the SSD accessed by a host as a unit; storing PRP entries of basic unit size of N hosts accessing SSD; n is an integer greater than 1; applying for a buffer to buffer data through the applied buffer; the size of the buffer is M times of the size of a basic unit of the SSD accessed by the host; m is an integer greater than 1.
For the introduction of the device provided in the present application, please refer to the above method embodiment, which is not described herein again.
The present application further provides a computer readable storage medium having a computer program stored thereon, which when executed by a processor, performs the steps of:
receiving a read-write command and splitting the read-write command by taking the size of a basic unit of the SSD accessed by a host as a unit; storing PRP entries of basic unit size of N hosts accessing SSD; n is an integer greater than 1; applying for a buffer to buffer data through the applied buffer; the size of the buffer is M times of the size of a basic unit of the SSD accessed by the host; m is an integer greater than 1.
The computer-readable storage medium may include: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
For the introduction of the computer-readable storage medium provided in the present application, please refer to the above method embodiments, which are not described herein again.
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device, the apparatus and the computer-readable storage medium disclosed by the embodiments correspond to the method disclosed by the embodiments, so that the description is simple, and the relevant points can be referred to the description of the method.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The detailed description is given above of the processing method, apparatus, device and computer readable storage medium for host read-write data provided by the present application. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
Claims (10)
1. A processing method for reading and writing data by a host is characterized by comprising the following steps:
receiving a read-write command and splitting the read-write command by taking the size of a basic unit of the SSD accessed by a host as a unit;
storing PRP entries of basic unit size of N hosts accessing SSD; n is an integer greater than 1;
applying for a buffer to buffer data through the applied buffer; the size of the buffer is M times of the size of a basic unit of the SSD accessed by the host; m is an integer greater than 1.
2. The processing method of claim 1, further comprising:
when data is transferred, a plurality of DMA processing commands are simultaneously initiated, and the state machine is switched until the data in the buffer is transferred.
3. The processing method as claimed in claim 2, wherein the size of the buffer applied for is at least the size of N PRP entries.
4. The processing method according to claim 3, wherein the number of the PRP entries is specifically 32, and the size of the buffer is 128K.
5. The processing method of claim 4, further comprising: and recording the buffer position occupied by each logical block address through the buffer index.
6. A processing apparatus for reading and writing data by a host, comprising:
the read-write command splitting module is used for receiving the read-write command and splitting the read-write command by taking the size of a basic unit of the SSD accessed by the host as a unit;
a PRP entry storage module, configured to store N PRP entries with a size of a basic unit that the host accesses the SSD; n is an integer greater than 1;
the buffer application module is used for applying a buffer to buffer data through the applied buffer; the size of the buffer is M times of the size of a basic unit of the SSD accessed by the host; m is an integer greater than 1.
7. The processing apparatus as in claim 6, further comprising:
and the command initiating module is used for simultaneously initiating a plurality of DMA processing commands when data are transported, and switching the state machine until the data in the buffer are transported.
8. The processing apparatus as in claim 7, further comprising:
and the recording module is used for recording the buffer positions occupied by the logical block addresses through the buffer indexes.
9. A processing device for reading and writing data by a host, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the processing method for reading and writing data by the host according to any one of claims 1 to 5 when executing the computer program.
10. A computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the steps of a method for processing data read from and written to by a host computer according to any one of claims 1 to 5.
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| CN113064552A (en) * | 2021-03-24 | 2021-07-02 | 山东华芯半导体有限公司 | Autonomous separated NVMe PRP acquisition acceleration method |
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| CN111221476A (en) * | 2020-01-08 | 2020-06-02 | 深圳忆联信息系统有限公司 | Front-end command processing method and device for improving SSD performance, computer equipment and storage medium |
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| CN111221476A (en) * | 2020-01-08 | 2020-06-02 | 深圳忆联信息系统有限公司 | Front-end command processing method and device for improving SSD performance, computer equipment and storage medium |
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| CN113064552A (en) * | 2021-03-24 | 2021-07-02 | 山东华芯半导体有限公司 | Autonomous separated NVMe PRP acquisition acceleration method |
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