CN105843693B - A kind of shared drive method towards high speed Maglev emulation - Google Patents
A kind of shared drive method towards high speed Maglev emulation Download PDFInfo
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- CN105843693B CN105843693B CN201610164566.7A CN201610164566A CN105843693B CN 105843693 B CN105843693 B CN 105843693B CN 201610164566 A CN201610164566 A CN 201610164566A CN 105843693 B CN105843693 B CN 105843693B
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- shared drive
- drive block
- high speed
- communication
- write
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- 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
- G06F9/54—Interprogram communication
- G06F9/544—Buffers; Shared memory; Pipes
Abstract
The present invention relates to a kind of shared drive methods towards high speed Maglev emulation, it include that an at least computer and magnetic float emulator towards high speed Maglev emulation, every computer is communicated by communication layers, and application layer can only be communicated with the communication layers of the machine, communication layers and application layer have communication node, method includes the following steps: the communication layers in (1) computer establish signal procedure process, signal procedure process establishes shared drive block and shared drive agency；(2) the shared drive agency described in is with quantity, network state and the address pointer information of window form storage shared drive block；(3) application layer in computer establishes program process, and program process provides title and the transmitting-receiving address of communication node to the shared drive agency, calls shared drive agency and communicate with corresponding shared drive block.Compared with prior art, the present invention has many advantages, such as that read or write speed is fast, effect is good.
Description
Technical field
The invention belongs to multiprocess communication fields, more particularly, to a kind of shared drive towards high speed Maglev emulation
Method.
Background technique
In order to realize data transmission or the letter in high speed Maglev emulation inside simulation computer or emulation server
Message communication, to complete system function and performance under the floating functional software progress environmental bug injection condition of the magnetic run to the machine
Test and validation, need using the efficient communication technology that can switch between multi-process of one kind.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of raising information to transmit
With the shared drive method towards high speed Maglev emulation of direct fault location efficiency, multiple shared drive blocks are carried out functional
It divides, and establishes Initialization file and the shared drive agency of maintenance shared drive, using mutual exclusion mechanism and together
Step mechanism calls the synchronization read-write operation of shared drive so that process provides a small amount of communication information, logical between completion multi-process
Letter.
The purpose of the present invention can be achieved through the following technical solutions: a kind of towards the shared of high speed Maglev emulation
Memory method, it is described to float emulator including an at least computer and magnetic towards high speed Maglev emulation, it is logical using P2P
Agreement is believed as communication construction, and every computer is communicated by communication layers, and application layer can only be logical with the communication layers of the machine
Letter, communication layers and application layer have a communication node, this method using " main-from " formula Technical Architecture, comprising the following steps:
(1) communication layers in computer establish signal procedure process, and signal procedure process is established shared drive block and shared
Internal memory agents；
(2) the shared drive agency described in is referred to quantity, network state and the address of window form storage shared drive block
Needle information；
(3) application layer in computer establishes program process, and program process is acted on behalf of to the shared drive
Title and the transmitting-receiving address of communication node are provided, shared drive agency is called and is communicated with corresponding shared drive block.
In high speed Maglev simulation computer, communication layers and apply journey that shared drive is supplied to simultaneously in computer
Sequence uniformly create and manage by communication layers, and other applications can only send request to obtain the reading to shared drive
Write permission.
Establish shared drive block in the step (1) method particularly includes: the signal procedure process according to
Communication node information in Initialization file creates File Mapping, creates being total to for twice of outgoing communication node quantity
Memory block is enjoyed, the Initialization file is the program code write by user, and user passes through described in modification
Initialization file is to modify shared drive block.
The read-only evidence of shared drive block writes data.
Using multiple threads in mutual exclusion lock control computer to the right to use of shared drive block in the shared drive block,
Specifically: when a thread carries out read or write to some shared drive block, mutual exclusion lock is set to lock status, makes other tune
Be set to blocked state with the thread of the shared drive block, until the read or write terminate and mutual exclusion lock be unlocked state, other
The shared drive block can be used in thread.
Communication layers read the title of communication node in the step (1), distribute one " reading " for each communication node
Shared drive block and " write-in " shared drive block, and each shared drive block using MapViewOfFile () or
MapViewOfFileEx () function, will be in the address space of File Mapping to corresponding process.
The shared drive proxy call event sends " read/write " request of process to shared drive block, changes process
State.
In each shared drive block, the read-write synchronization mechanism of shared drive is realized using event.When some " is write
Entering " SetEvent () function when being that content is sky in unlocked state and memory, is then set to extension by the mutual exclusion lock of shared drive block
The state of rising, waits the calling of thread and the signal of write operation.
When the mutual exclusion lock of some " reading " shared drive block is unlocked state and memory content is not sky, it is not necessarily to line
SetEvent () function is set to signaling states automatically to carry out read operation by journey calling.Until thread reading finishes, releasing is sent out
Signal condition is to realize read-write synchronization mechanism.
Shared drive acts on behalf of read-write operation of the Container using mutexes Mutex control multi-process to shared drive block.
When process communicates a communication node, Mutex is set to lock status, makes other that the process of same node point be called to be set to resistance
Plug-like state.Until the communication node use finishes, Mutex is set to unlocked state.
Shared drive acts on behalf of Container and uses the network state of event Event maintenance shared drive block.When previous step
When Mutex is lock status, Container sends Event signal to specific shared drive block, shared drive block is set to " read/
Write " it state or returns to shared drive block and is not present or error signal is to process.
Data in each shared drive block are only uni-directionally read or are written.Shared drive is each communication
Node distributes " reading " shared drive block and " write-in " shared drive block.When process uses shared drive, need
" read/write " operation is carried out in the shared drive block of different communication node, it is ensured that the data flow in each memory block unidirectionally passes
Defeated, the case where avoiding the occurrence of " read/write conflict ", improves the efficiency that process calls shared drive.
Compared with prior art, the invention has the following advantages that
(1) Initialization file is established, such user does not need modification program, and only modifying text information can
To achieve the effect that additions and deletions change shared drive, effect is good, and the time that user needs is few；
(2) shared drive block can only be read, or write data, can not two functions have both.Reading and writing data is accelerated in this way
Speed reads the data memory block for reading data, writes with what is write, prevents read/write conflict；
(3) shared drive agency is established, shared drive block needs store name when establishing, the address ip, whether remembers
It records the various information such as log, but the pointer information of shared drive agency's stored memory block, whether can read and write
A small amount of information such as state.So user only needs to provide a small amount of information and shared drive can be called to act on behalf of, allows and act on behalf of place to go
The problem of reason read-write, user need to only be fed back.The speed of read-write is accelerated in this way.
Detailed description of the invention
Fig. 1 is flow chart of the invention.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of shared drive method towards high speed Maglev emulation, emulates towards high speed Maglev
Emulator is floated including an at least computer and magnetic, uses P2P communication protocol as communication construction, every computer passes through logical
Letter layer is communicated, and application layer can only be communicated with the communication layers of the machine, and communication layers and application layer have communication node, this method
Using the Technical Architecture of " main-from " formula, comprising the following steps:
(1) communication layers in computer establish signal procedure process, and signal procedure process is established shared drive block and shared
Internal memory agents, in high speed Maglev simulation computer, shared drive is supplied to communication layers and application in computer simultaneously
Layer uniformly create and manage by communication layers, and other applications can only send request to obtain the reading to shared drive
Write permission；Establish shared drive block method particularly includes: signal procedure process is according to the communication in Initialization file
Nodal information creates File Mapping using CreateFileMapping (), creates the shared of twice of outgoing communication node quantity
Memory block.User modifies shared drive block by modification Initialization file.Shared drive uses Windows system
The Initialization file (.ini file) of system is configured and is managed.Communication layers read the title of communication node, are every
A communication node distributes " reading " shared drive block and " write-in " shared drive block, and each shared drive block makes
It, will be in the address space of File Mapping to corresponding process with MapViewOfFile () or MapViewOfFileEx () function.
(2) shared drive agency is with quantity, network state and the address pointer information of window form storage shared drive block；
(3) application layer in computer establishes program process, and program process provides logical to shared drive agency
Title and the transmitting-receiving address for believing node, call shared drive agency and communicate with corresponding shared drive block.
Using multiple threads in mutual exclusion lock control computer to the right to use of shared drive block in shared drive block, specifically
Are as follows: when a thread carries out read or write to some shared drive block, mutual exclusion lock is set to lock status, calling other should
The thread of shared drive block is set to blocked state, until the read or write terminate and mutual exclusion lock be unlocked state, other threads
The shared drive block can be used.
Shared drive proxy call event sends " read/write " request of process to shared drive block, changes state of a process.
In each shared drive block, the read-write synchronization mechanism of shared drive is realized using event.When some " is write
Entering " SetEvent () function when being that content is sky in unlocked state and memory, is then set to extension by the mutual exclusion lock of shared drive block
The state of rising, waits the calling of thread and the signal of write operation.
When the mutual exclusion lock of some " reading " shared drive block is unlocked state and memory content is not sky, it is not necessarily to line
SetEvent () function is set to signaling states automatically to carry out read operation by journey calling.Until thread reading finishes, releasing is sent out
Signal condition is to realize read-write synchronization mechanism.
Shared drive acts on behalf of read-write operation of the Container using mutexes Mutex control multi-process to shared drive block.
When process communicates a communication node, Mutex is set to lock status, makes other that the process of same node point be called to be set to resistance
Plug-like state.Until the communication node use finishes, Mutex is set to unlocked state.
Shared drive acts on behalf of Container and uses the network state of event Event maintenance shared drive block.When previous step
When Mutex is lock status, Container sends Event signal to specific shared drive block, shared drive block is set to " read/
Write " it state or returns to shared drive block and is not present or error signal is to process.
Data in each shared drive block are only uni-directionally read or are written.Shared drive is each communication
Node distributes " reading " shared drive block and " write-in " shared drive block.When process uses shared drive, need
" read/write " operation is carried out in the shared drive block of different communication node, it is ensured that the data flow in each memory block unidirectionally passes
Defeated, the case where avoiding the occurrence of " read/write conflict ", improves the efficiency that process calls shared drive.
Claims (6)
1. a kind of shared drive method towards high speed Maglev emulation, described emulate towards high speed Maglev includes extremely
A few computer and magnetic float emulator, and every computer is communicated by communication layers, and application layer can only be with the machine
Communication layers communication, communication layers and application layer have communication node, which is characterized in that method includes the following steps:
(1) communication layers in computer establish signal procedure process, and multiple shared drive blocks are carried out function by signal procedure process
Property divide, establish shared drive block and shared drive agency；
(2) the shared drive agency described in is with the quantity of window form storage shared drive block, network state and address pointer letter
Breath；
(3) application layer in computer establishes program process, and program process is acted on behalf of to the shared drive and provided
The title of communication node and transmitting-receiving address are called shared drive agency and are communicated with corresponding shared drive block.
2. a kind of shared drive method towards high speed Maglev emulation according to claim 1, which is characterized in that institute
The step of stating establishes shared drive block in (1) method particularly includes: the signal procedure process is according in initialization files
Communication node information creates File Mapping, creates twice of shared drive block of outgoing communication node quantity, and user passes through modification institute
The initialization files stated are to modify shared drive block.
3. a kind of shared drive method towards high speed Maglev emulation according to claim 1, which is characterized in that institute
The read-only evidence of shared drive block stated writes data.
4. a kind of shared drive method towards high speed Maglev emulation according to claim 1, which is characterized in that institute
Using multiple threads in mutual exclusion lock control computer to the right to use of shared drive block in the shared drive block stated, specifically: when
When one thread carries out read or write to some shared drive block, mutual exclusion lock is set to lock status, other is made to call this shared
The thread of memory block is set to blocked state, and until the read or write terminates and mutual exclusion lock is unlocked state, other threads can make
With the shared drive block.
5. a kind of shared drive method towards high speed Maglev emulation according to claim 1, which is characterized in that institute
Communication layers read the title of communication node in the step of stating (1), distribute " reading " shared drive block for each communication node
With " write-in " shared drive block, and each shared drive block using MapViewOfFile () or
MapViewOfFileEx () function, by the File Mapping of communication data into corresponding reading/write-in process address space.
6. a kind of shared drive method towards high speed Maglev emulation according to claim 1, which is characterized in that institute
The shared drive proxy call event stated sends " read/write " request of process to shared drive block, changes state of a process.
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Cited By (1)
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| CN108107750B (en) * | 2017-11-29 | 2023-10-20 | 国网宁夏电力有限公司电力科学研究院 | Real-time IO data processing method and system for power system simulation |
| CN112991511B (en) * | 2020-10-13 | 2023-03-24 | 中国汽车技术研究中心有限公司 | Point cloud data display method |
| CN114524007B (en) * | 2022-02-07 | 2023-03-21 | 北京交通大学 | Magnetic levitation running control digital twin system |
| CN117097814B (en) * | 2023-09-21 | 2023-12-29 | 长沙科梁科技有限公司 | Asynchronous communication method between simulation model and terminal |
| CN117408060A (en) * | 2023-10-13 | 2024-01-16 | 上海同星智能科技有限公司 | Whole vehicle model simulation performance optimization method, storage medium and electronic equipment |
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