CN108052460A - Dram mapped file read method in ground checkout equipment embedded software - Google Patents
Dram mapped file read method in ground checkout equipment embedded software Download PDFInfo
- Publication number
- CN108052460A CN108052460A CN201711298465.XA CN201711298465A CN108052460A CN 108052460 A CN108052460 A CN 108052460A CN 201711298465 A CN201711298465 A CN 201711298465A CN 108052460 A CN108052460 A CN 108052460A
- Authority
- CN
- China
- Prior art keywords
- file
- mapping
- size
- thread
- embedded software
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
- G06F12/02—Addressing or allocation; Relocation
- G06F12/08—Addressing or allocation; Relocation in hierarchically structured memory systems, e.g. virtual memory systems
- G06F12/10—Address translation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/46—Multiprogramming arrangements
- G06F9/50—Allocation of resources, e.g. of the central processing unit [CPU]
- G06F9/5005—Allocation of resources, e.g. of the central processing unit [CPU] to service a request
- G06F9/5027—Allocation of resources, e.g. of the central processing unit [CPU] to service a request the resource being a machine, e.g. CPUs, Servers, Terminals
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2212/00—Indexing scheme relating to accessing, addressing or allocation within memory systems or architectures
- G06F2212/10—Providing a specific technical effect
- G06F2212/1016—Performance improvement
- G06F2212/1024—Latency reduction
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Software Systems (AREA)
- Stored Programmes (AREA)
Abstract
The invention discloses one kind for Dram mapped file read method in ground checkout equipment embedded software, it is related to technical field of data processing.The present invention obtains the information of a file occupied space acquisition module, a CPU acquisition modules and current thread timeslice acquisition module acquisition including a ready thread pretreatment unit respectively, memory mapping size according to file destination carries out memory map operation, one data exchange module is used for data exchange operation, thread time piece is adjusted accordingly simultaneously, and the cyclic mapping reading of data is carried out according to calculated value.The present invention passes through the dynamic mapping to large data files, the granularity number size for mapping segmentation changes with the factors such as file size, embedded software state dynamic, and timeslice size is performed according to every section of mapping read access time dynamic adjustment, so as to effectively improve file reading and thread execution efficiency, reduce resource overhead.
Description
Technical field
The invention belongs to technical field of data processing, are applied to ground checkout equipment embedded software more particularly to one kind
Middle Dram mapped file read method.
Background technology
Without loss of generality, by taking space flight and aviation TT＆C system, air-ground communications systems as an example, ground checkout equipment is responsible for response
Machine carries out the ground test verification of comprehensive, more scenes, and human-computer interaction function is the weight of ground checkout equipment embedded software
Want function.The realization of embedded software finishing man-machine interaction function is the major control software of ground checkout equipment.It is surveyed on ground
It tries in equipment embedded software, it is an important factor for influencing embedded software performance that the file of software, which reads power formula,.It is existing big
Data file read method average response time is long, is mainly manifested in：
(1) file reading conventional in ground checkout equipment embedded software is by the way of I/O readings, in I/
In O operation, embedded software needs to carry out caching process to the content of file, loads data into memory, followed by number first
According to the write-back to file, the release of memory block is finally carried out again.This reading manner occupancy hardware resource is more, efficiency is low.
(2) the Memory Mapping File reading manner based on virtual map, can be directly and corresponding by the physical memory of file
Virtual address space mapped, so as to improve file reading rate.But the mode of this reading is in reply big data
During file, the efficiency read can occur significantly to decline.
At present, the research read both at home and abroad to the big data of ground checkout equipment embedded software is concentrated mainly on two sides
Face：
1. reading the research of large data files for asynchronous system, improve file by way of asynchronous reading and read speed
The problem of degree dallies with CPU caused by the imbalance of CPU processing speeds；
2. reading the research of large data files for directly accessing memory, take for large data files and reflected using virtual memory
Penetrate, direct memory access etc. is directly to the method for internal storage access, achieve the effect that large data files are efficiently read with this.
In terms of ground checkout equipment embedded software file reading, Memory Mapping File read method is Recent study
Hot spot, for memory mapping principle as shown in Figure 1, by taking Windows CE as an example, Windows CE use one linear 32
Position virtual address space, virtual address space are divided into kernel spacing and user's space, every 2GB.Include in Windows CE
Physical address and two kinds of address styles of virtual address of mapping, storage mapping file technique are exactly to be reflected using the content of file data
It is mapped to this characteristic in the corresponding virtual address space of process.Due to the limit that the virtual address spaces of Windows CE in itself are limited
System when the file for big data carries out memory mapping, is often mapped by the way of segmentation.At present both at home and abroad to dividing
Section memory mapping technique also proposed many researchs.
The 35th phase in 2014《Chinese Academy of Sciences's college journal》Page 117 to page 120, what Ma Zhigang and Liu Wenyi were delivered
Paper " research of aerospace testing system Large Volume Data curve plotting method " proposes to utilize the realization pair of subsection compression memory techniques
The piecemeal of large data files is read.The 48th phase in 2011《Journal of Computer Research and Development》Page 63 to page 67 have Ma Li and Li Jing Zhe
Etc. in " a kind of mass data method for quickly reading based on multi-core environment " delivered, propose subsection compression granularity number and load
Dynamic or the static reading rate for combining, effectively raising file.It is large in the Wuhan Central China University of Science and Technology in Shan light in 2012
Scholar's paper " hybrid modeling system data interface and big file read-write technical research " proposes to carry out system granular number to fragment size
The subsection compression file mode of compensation handles big file.
Appeal segmentation Memory Mapping File read method Memory Mapping File reading on the basis of realize method or
It is the optimization in efficiency, but its direction considered is excessively single.It typically only proposes and maps file fragmentation or in insertion
Formula running software outlet just has determined that specific segmented mode or only considers the single factor of file size.
Therefore, it is domestic the present invention provides the problem above that a kind of method solves ground checkout equipment embedded software
Have no relevant report outside.
The content of the invention
It is an object of the invention to provide Dram mapped file read method in ground checkout equipment embedded software,
By way of the Memory Mapping File based on virtual map and file gradually obtained, solve existing read-write mode occupy it is hard
The problem of part resource is more, efficiency is low, the response time is long.
In order to solve the above technical problems, the present invention is achieved by the following technical solutions：
The present invention is Dram mapped file read method in ground checkout equipment embedded software, including ready thread
Pretreatment unit is equipped in the ready thread pretreatment unit：
One file occupies acquisition module, for obtaining the pretreated file occupied space size of thread；
One cpu busy percentage acquisition module, for obtaining current cpu busy percentage；
One current thread timeslice acquisition module, for obtaining current thread timeslice size；
Physical storage for preserving an address space region, while is submitted to this region by one memory mapping block；
One memory map sub-region module, for being divided to address space region；
One data exchange module swaps for mapping the data completed.
File reading includes the following steps：
Step S000 utilizes CreateFile function creation file kernel objects, with the return value HANDLE hFile of function
It represents；
Step S001 is using the file object hFile returned in step S000 as establishment file mapping object
The input value of CreateFileMapping functions, return value HANDLE hFileMap are corresponding file-mapping object；
Step S002 defines SYSTEM_INFO SysInfo objects, obtains system partition size DWORDdwGran, and profit
With file object hFile GetFileSize functions is called to obtain document size；
Step S003 carries out file according to the document size size that GetFileSize functions obtain at corresponding dynamic segmentation
Reason；
Step S004 obtains system CPU state, calculates whether ratio memory shared by every section of size adds CPU current utilizations
Meet 70% less than cpu busy percentage；
If so, perform step S005；
If it is not, then perform step S006；
After file current fragment number is added 1 by step S005, step S004 is performed；
The system partition size quantity q*g of every section of step S006 compensation maps sets mapping length dwBlockBytes
0 is arranged to for q*g, start offset address qwFileOffset；
Step S007 determines whether first time map view；
If so, perform step S008；
If it is not, then perform step S009；
Step S008 obtains the count value n1 of current cpu frequency and counter；
Step S009 calls MapViewOfFile function creations to correspond to the mapping of section according to mapping length and offset address
View, function return value LPBYTElpbAddress；
Step S010 utilizes mappings of the file map pointer LPBYTElpbAddress returned in step S009 to obtaining
View accesses；
Step S011 passes through calling using the file map pointer LPBYTElpbAddress returned in step S009
UnmapViewOfFile functions cancel file map；
Step S012 obtains the count value n2 of nonce counter if first time map view, according to n1, n2 and CPU frequency
Rate calculates every section of mapping code and performs time t；
Step S013 obtains current time piece, and thread time piece is adjusted；
Step S014 judges whether data access completion；
If so, perform step S015；
If it is not, start offset address qwFileOffset is then performed into step S007 plus after q*g；
Step S015 closes the kernel objects for being used for File Mapping；
Step S016 closes the kernel objects for being used for file.
Preferably, the scheduling steps are as follows：
Step S101 ready threads preprocessing module obtain file destination occupied space size, current cpu busy percentage and
Current thread timeslice size；
The memory mapping size that step S102 carries out file destination according to pretreatment parameter calculates；
Step S103 carries out first time memory map operation on the basis of confirming first time memory mapping size；
Step S104 carries out data exchange operation by data exchange module；
Step S105 adjusts accordingly thread time piece；
Step S106, which judges whether to access, to be finished；
If so, perform step S107；
If it is not, then perform step S104；
Step S107 closes File Mapping memory object and file kernel objects.
Preferably, the Memory Mapping File read method, includes the following steps：
Preferably, the memory mapping block maps the system that length scale is ground checkout equipment embedded software every time
The integral multiple of partition size.
Preferably, the mapping length scale cannot be guaranteed to be segmented the size of shared memory when file is averagely segmented to be
The integral multiple for partition size of uniting, in subsection compression length L values, should take following method：Make L=q*g+r, acquire remainder and
Business q；If r >=g/2, L=(q+1) * g, otherwise L=q*g.
Preferably, the ground checkout equipment embedded software thread default time piece size is 100ms.
The invention has the advantages that：
Dram mapped file read method in ground checkout equipment embedded software proposed by the present invention, for big number
The content map file based on virtual map is proposed according to file and file is separated to the method gradually obtained, is effectively improved ground
The efficiency that test equipment embedded software large data files are read.
1) in the case where ground checkout equipment embedded software carries out big data quantity reading, by direct to physical memory
It carries out corresponding virtual address space to map and be segmented the mode of reading, file block is gradually obtained into data, so as to effectively improve
File reading efficiency；
2) in the case where ground checkout equipment embedded software carries out big data quantity reading, by work at present thread
The real-time detection of state can know thread remaining time leaf length, be adaptively adjusted thread time piece size, avoid due to
Resource overhead caused by multithreading frequent switching improves thread execution efficiency.
Certainly, implement any of the products of the present invention and do not necessarily require achieving all the advantages described above at the same time.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, embodiment will be described below required
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
The step of Fig. 1 is Dram mapped file read method in ground checkout equipment embedded software of the invention
Figure；
Fig. 2 is the system frame of Dram mapped file read method in ground checkout equipment embedded software of the invention
Figure；
Fig. 3 is the scheduling step of Dram mapped file read method in ground checkout equipment embedded software of the invention
Rapid figure；
Fig. 4 is embedded software memory mapping principle figure in ground checkout equipment.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained all other without creative efforts
Embodiment belongs to the scope of protection of the invention.
Refering to Figure 1, the present invention is Dram mapped file reading side in ground checkout equipment embedded software
Method includes the following steps：
Step S000 utilizes Create File function creation file kernel objects, with the return value HANDLE of function
HFile is represented；
Step S001 is using the file object hFile returned in step S000 as establishment file mapping object
The input value of CreateFileMapping functions, return value HANDLE hFileMap are corresponding file-mapping object；
Step S002 defines SYSTEM_INFO SysInfo objects, obtains system partition size DWORDdwGran, and profit
With file object hFile GetFileSize functions is called to obtain document size；
Step S003 carries out file according to the document size size that GetFileSize functions obtain at corresponding dynamic segmentation
Reason；
Step S004 obtains system CPU state, calculates whether ratio memory shared by every section of size adds CPU current utilizations
Meet 70% less than cpu busy percentage；
If so, perform step S005；
If it is not, then perform step S006；
After file current fragment number is added 1 by step S005, step S004 is performed, in the range of CPU can be utilized rationally,
Xun Huan reads mapping；
The system partition size quantity q*g of every section of step S006 compensation maps sets mapping length dwBlockBytes
0 is arranged to for q*g, start offset address qwFileOffset；
Step S007 determines whether first time map view；
If so, perform step S008；
If it is not, then perform step S009；
Step S008 obtains the count value n1 of current cpu frequency and counter；
Step S009 calls MapViewOfFile function creations to correspond to the mapping of section according to mapping length and offset address
View, function return value LPBYTElpbAddress；
Step S010 utilizes mappings of the file map pointer LPBYTElpbAddress returned in step S009 to obtaining
View accesses；
Step S011 passes through calling using the file map pointer LPBYTElpbAddress returned in step S009
UnmapViewOfFile functions cancel file map；
Step S012 obtains the count value n2 of nonce counter if first time map view, according to n1, n2 and CPU frequency
Rate calculates every section of mapping code and performs time t；
Step S013 obtains current time piece, thread time piece is adjusted, timeslice, that is, CPU distributes to the system
A period is all assigned in time, per thread；
Step S014 judges whether data access completion；
If so, perform step S015；
If it is not, start offset address qwFileOffset is then performed into step S007 plus after q*g；
Step S015 closes the kernel objects for being used for File Mapping；
Step S016 closes the kernel objects for being used for file.
It refers to shown in Fig. 2, the present invention reads system for Dram mapped file in ground checkout equipment embedded software
System occupies acquisition module, for obtaining the pretreated file occupied space size of thread including a file；One cpu busy percentage
Acquisition module, for obtaining current cpu busy percentage；One current thread timeslice acquisition module, for obtaining the current thread time
Piece size；Physical storage for preserving an address space region, while is submitted to this region by one memory mapping block；
One memory map sub-region module, for being divided to address space region；One data exchange module, for mapping the number accomplished
According to swapping.
It refers to shown in Fig. 3, Dram mapped file scheduling steps are as follows in ground checkout equipment embedded software：
Step S101 ready threads preprocessing module obtain file destination occupied space size, current cpu busy percentage and
Current thread timeslice size；
The memory mapping size that step S102 carries out file destination according to pretreatment parameter calculates；
Step S103 carries out first time memory map operation on the basis of confirming first time memory mapping size；
Step S104 carries out data exchange operation by data exchange module；
Step S105 adjusts accordingly thread time piece；
Step S106, which judges whether to access, to be finished；
If so, perform step S107；
If it is not, then perform step S104；
Step S107 closes File Mapping memory object and file kernel objects.
It refers to shown in 4, embedded software memory mapping principle is by the position of file on hard disk in ground checkout equipment
It corresponds between the region identical with a block size in process logic address space, will be counted by physical memory in logical address
According to sending corresponding file view to.
Wherein, memory mapping block maps the system distribution grain that length scale is ground checkout equipment embedded software every time
The integral multiple of degree, when a region in reserved address space, system is needed since the border of a partition size, and system must
It must ensure the integral multiple of the system partition size of the ground checkout equipment embedded software in the region, it is convenient for saving memory
Memory management.
Wherein, the size that mapping length scale cannot be guaranteed to be segmented shared memory when file is averagely segmented is distributed for system
The integral multiple of granularity in subsection compression length L values, should take following method：L=q*g+r is made, acquires remainder and business q；If
R >=g/2, then L=(q+1) * g, otherwise L=q*g；When memory mapping thread timeslice size be less than successively subsection compression when
Between t when, by tslotBe dimensioned to time t, but when t is excessive, can cause in embedded software and memory maps thread phase
The long failure that performs that may cause task of the thread latency of same priority size, therefore to timeslice tslotValue should
It is limited.
Wherein, ground checkout equipment embedded software thread default time piece size is 100ms, grade line of taking into account that All factors being equal, preference will be give to
The fairness performed between journey, while the priority of execution thread is set to THREAD_PRIORITY_NORMAL, by tslot's
Set adjustment as follows：
Work as t>During t1, t is madeslot=t；Work as t<During t1, if tslot=n*t+trest, n values are obtained, make tslot=n*t；
If t>120ms then makes tslot=100ms.
It is worth noting that, in above system embodiment, included unit is simply drawn according to function logic
Point, but above-mentioned division is not limited to, as long as corresponding function can be realized；In addition, each functional unit is specific
Title is also only to facilitate mutually distinguish, the protection domain being not intended to limit the invention.
In addition, one of ordinary skill in the art will appreciate that realize all or part of step in the various embodiments described above method
It is that relevant hardware can be instructed to complete by program, corresponding program can be stored in a computer-readable storage and be situated between
In matter, the storage medium, such as ROM/RAM, disk or CD.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification,
It can make many modifications and variations.This specification is chosen and specifically describes these embodiments, is in order to preferably explain the present invention
Principle and practical application so that skilled artisan can be best understood by and utilize the present invention.The present invention is only
It is limited by claims and its four corner and equivalent.
Claims (5)
1. Dram mapped file read method in ground checkout equipment embedded software, which is characterized in that including ready line
Journey pretreatment unit is equipped in the ready thread pretreatment unit：
One file occupies acquisition module, for obtaining the pretreated file occupied space size of thread；
One cpu busy percentage acquisition module, for obtaining current cpu busy percentage；
One current thread timeslice acquisition module, for obtaining current thread timeslice size；
Physical storage for preserving an address space region, while is submitted to this region by one memory mapping block；
One memory map sub-region module, for being divided to address space region；
One data exchange module swaps for mapping the data completed；
This document read method includes following process：
Step S000 utilizes CreateFile function creation file kernel objects, with the return value HANDLE hFile tables of function
Show；
Step S001 regard the file object hFile returned in step S000 as establishment file by ready thread pretreatment unit
The input value of mapping object CreateFileMapping functions, return value HANDLE hFileMap are corresponding File Mapping pair
As；
Step S002 defines SYSTEM_INFO SysInfo objects, obtains system partition size DWORDdwGran, and utilizes text
Part object hFile calls GetFileSize functions to obtain document size；
Step S003 carries out file according to the document size size that GetFileSize functions obtain corresponding dynamic segmentation processing；
Step S004 obtains system CPU state, and whether ratio memory shared by every section of size of calculating meets plus CPU current utilizations
Less than the 70% of cpu busy percentage；
If so, perform step S005；
If it is not, then perform step S006；
After file current fragment number is added 1 by step S005, step S004 is performed；
Mapping length dwBlockBytes is arranged to q* by the system partition size quantity q*g of every section of step S006 compensation maps
G, start offset address qwFileOffset are arranged to 0；
Step S007 determines whether first time map view；
If so, perform step S008；
If it is not, then perform step S009；
Step S008 obtains the count value n1 of current cpu frequency and counter；
Step S009 corresponds to the map view of section according to mapping length and offset address, calling MapViewOfFile function creations,
Function return value is LPBYTElpbAddress；
Step S010 is using the file map pointer LPBYTElpbAddress returned in step S009 to obtained map view
It accesses；
Step S011 passes through calling using the file map pointer LPBYTElpbAddress returned in step S009
UnmapViewOfFile functions cancel file map；
Step S012 obtains the count value n2 of nonce counter, according to n1, n2 and cpu frequency meter if first time map view
It calculates every section of mapping code and performs time t；
Step S013 obtains current time piece, and thread time piece is adjusted；
Step S014 judges whether data access completion；
If so, perform step S015；
If it is not, start offset address qwFileOffset is then performed into step S007 plus after q*g；
Step S015 closes the kernel objects for being used for File Mapping；
Step S016 closes the kernel objects for being used for file.
2. Dram mapped file read method in ground checkout equipment embedded software according to claim 2,
It is characterized in that, the scheduling steps are as follows：
Step S101 ready threads preprocessing module obtains file destination occupied space size, current cpu busy percentage and current
Thread time piece size；
The memory mapping size that step S102 carries out file destination according to pretreatment parameter calculates；
Step S103 carries out first time memory map operation on the basis of confirming first time memory mapping size；
Step S104 carries out data exchange operation by data exchange module；
Step S105 adjusts accordingly thread time piece；
Step S106, which judges whether to access, to be finished；
If so, perform step S107；
If it is not, then perform step S104；
Step S107 closes File Mapping memory object and file kernel objects.
3. Dram mapped file read method in ground checkout equipment embedded software according to claim 1,
It is characterized in that, the memory mapping block maps the system that length scale is ground checkout equipment embedded software and distributes grain every time
The integral multiple of degree.
4. Dram mapped file read method in ground checkout equipment embedded software according to claim 3,
It is characterized in that, the size that the mapping length scale cannot be guaranteed to be segmented shared memory when file is averagely segmented is distributed for system
The integral multiple of granularity in subsection compression length L values, should take following method：
L=q*g+r is made, acquires remainder and business q；If r >=g/2, L=(q+1) * g, otherwise L=q*g.
5. Dram mapped file read method in ground checkout equipment embedded software according to claim 1,
It is characterized in that, the ground checkout equipment embedded software thread default time piece size is 100ms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711298465.XA CN108052460A (en) | 2017-12-08 | 2017-12-08 | Dram mapped file read method in ground checkout equipment embedded software |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711298465.XA CN108052460A (en) | 2017-12-08 | 2017-12-08 | Dram mapped file read method in ground checkout equipment embedded software |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108052460A true CN108052460A (en) | 2018-05-18 |
Family
ID=62123686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711298465.XA Pending CN108052460A (en) | 2017-12-08 | 2017-12-08 | Dram mapped file read method in ground checkout equipment embedded software |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108052460A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109144955A (en) * | 2018-07-12 | 2019-01-04 | 武汉斗鱼网络科技有限公司 | A kind of file reading and electronic equipment |
| CN109344054A (en) * | 2018-09-03 | 2019-02-15 | 郑州云海信息技术有限公司 | A kind of software test data statistical method and system |
| CN111858200A (en) * | 2020-06-22 | 2020-10-30 | 银清科技有限公司 | Throughput control method and device in system test and electronic equipment |
| CN113194266A (en) * | 2021-04-28 | 2021-07-30 | 深圳迪乐普数码科技有限公司 | Image sequence frame real-time rendering method and device, computer equipment and storage medium |
| CN113626272A (en) * | 2021-08-27 | 2021-11-09 | 广东九联科技股份有限公司 | Memory read-write rate testing method, device and system based on mmap system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102231121A (en) * | 2011-07-25 | 2011-11-02 | 北方工业大学 | Memory mapping-based rapid parallel extraction method for big data file |
| US20160077761A1 (en) * | 2014-09-16 | 2016-03-17 | Kove Ip, Llc | Paging of external memory |
-
2017
- 2017-12-08 CN CN201711298465.XA patent/CN108052460A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102231121A (en) * | 2011-07-25 | 2011-11-02 | 北方工业大学 | Memory mapping-based rapid parallel extraction method for big data file |
| US20160077761A1 (en) * | 2014-09-16 | 2016-03-17 | Kove Ip, Llc | Paging of external memory |
Non-Patent Citations (3)
| Title |
|---|
| 宋丽丽: "面向海量的海洋数据动态可视化与实时绘制技术研究", 《中国优秀硕士学位论文全文数据库-基础科学辑》 * |
| 陕光: "混合建模系统数据接口与巨文件读写技术研究", 《中国优秀硕士学位论文全文数据库-信息科技辑》 * |
| 马志刚，刘文怡: "航天测试系统大容量数据曲线绘制方法的研究", 《图学学报》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109144955A (en) * | 2018-07-12 | 2019-01-04 | 武汉斗鱼网络科技有限公司 | A kind of file reading and electronic equipment |
| CN109344054A (en) * | 2018-09-03 | 2019-02-15 | 郑州云海信息技术有限公司 | A kind of software test data statistical method and system |
| CN111858200A (en) * | 2020-06-22 | 2020-10-30 | 银清科技有限公司 | Throughput control method and device in system test and electronic equipment |
| CN111858200B (en) * | 2020-06-22 | 2023-10-20 | 银清科技有限公司 | Throughput control method and device in system test and electronic equipment |
| CN113194266A (en) * | 2021-04-28 | 2021-07-30 | 深圳迪乐普数码科技有限公司 | Image sequence frame real-time rendering method and device, computer equipment and storage medium |
| CN113626272A (en) * | 2021-08-27 | 2021-11-09 | 广东九联科技股份有限公司 | Memory read-write rate testing method, device and system based on mmap system |
| CN113626272B (en) * | 2021-08-27 | 2024-02-20 | 广东九联开鸿科技发展有限公司 | Memory read-write rate testing method, device and system based on mmap system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108052460A (en) | Dram mapped file read method in ground checkout equipment embedded software | |
| US10949103B2 (en) | Native storage quality of service for virtual machines | |
| US20170075818A1 (en) | Memory management method and device | |
| KR101761301B1 (en) | Memory resource optimization method and apparatus | |
| CN107168654B (en) | A kind of isomery memory allocation method and system based on data object temperature | |
| CN105830059A (en) | Fine pitch connector socket | |
| CN103136120B (en) | Row buffering operating strategy defining method and device, bank division methods and device | |
| US9086882B2 (en) | DRAM energy use optimization using application information | |
| CN102958166A (en) | Resource allocation method and resource management platform | |
| KR101356033B1 (en) | Hybrid Main Memory System and Task Scheduling Method therefor | |
| CN104346284B (en) | A kind of EMS memory management process and memory management equipment | |
| CN103164278A (en) | Real-time dynamic memory manager achieving method for multi-core processor | |
| CN105094992A (en) | File request processing method and system | |
| Tao et al. | Load feedback-based resource scheduling and dynamic migration-based data locality for virtual hadoop clusters in openstack-based clouds | |
| CN109582649A (en) | A kind of metadata storing method, device, equipment and readable storage medium storing program for executing | |
| CN113010452B (en) | Efficient virtual memory architecture supporting QoS | |
| CN111510479B (en) | Resource allocation method and device for heterogeneous cache system | |
| JP2022016368A (en) | Method for managing name space in storage device, and storage device for using method | |
| CN111552569B (en) | System resource scheduling method, device and storage medium | |
| CN104765572A (en) | Energy-saving virtual storage server system and scheduling method | |
| CN106528453B (en) | Page table partition management device and method based on compound scale page | |
| CN103092677A (en) | Internal storage energy-saving system and method suitable for virtualization platform | |
| CN106201921A (en) | The method of adjustment of a kind of cache partitions capacity and device | |
| CN113010453A (en) | Memory management method, system, equipment and readable storage medium | |
| CN110865768B (en) | Write cache resource allocation method, device, equipment and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned | ||
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20230811 |