CN104407918B - A kind of preservation of avionics system task data and restoration methods - Google Patents
A kind of preservation of avionics system task data and restoration methods Download PDFInfo
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- CN104407918B CN104407918B CN201410714203.7A CN201410714203A CN104407918B CN 104407918 B CN104407918 B CN 104407918B CN 201410714203 A CN201410714203 A CN 201410714203A CN 104407918 B CN104407918 B CN 104407918B
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Abstract
The invention belongs to computer software technical field, and in particular to a kind of preservation of avionics system task data and restoration methods.The method has main steps that：1) system initialization, in DPM Module registers task data block tables, and obtains the task data being stored in MMM modules, according to the state of these data recovery tasks；2) mission data file table is created according to DPM mission bit streams；3) preservation of task data；4) recovery of task status.The execution discontinuous problem caused in intermodule migration by task is this method solve, the method is simple, it is easy to accomplish, improve the reliability of avionics system.
Description
Technical field
The invention belongs to computer software technical field, and in particular to a kind of preservation of avionics system task data and
Restoration methods.
Background technology
Comprehensive task processor (IMP) is the key foundation platform of avionics system, possess data, Graphics/Image and
The comprehensive treatment capability and system storage capacity of video.Avionics system includes multiple DPM (data processing module) and 1
MMM (MMM is high-capacity storage module).
The fusion of DPM operation sensors, Situation Assessment, offensive combat operation management, defence response management, weapon deliver Fire control calculation
Etc. task, when other DPM modules are in running order, wherein there is a DPM module to be in Status of Backups, in any one DPM
After breaking down, system can perform the task immigration of the DPM modules for breaking down to backup module.MMM is that Large Copacity is deposited
Storage module, the big data for storing avionics system.
Existing synthetic aviation electronic system lacks a kind of effective task data administrative skill, as one of DPM
After module breaks down, system can perform the task immigration of the DPM modules for breaking down to backup module, can only during execution
Performed since original state, it is impossible to from task immigration when state continue executing with, cause tasks carrying discontinuous, reduce boat
The reliability of empty electronic system.
The content of the invention
It is discontinuous in order to solve to be performed after avionics system task in background technology is migrated between DPM modules
Problem, the present invention proposes preservation and the restoration methods of a kind of avionics system task data, solves because task occurs
Execution discontinuous problem caused by migration, the method is simple, it is easy to accomplish, improve the reliability and work of avionics system
Make efficiency.
Concrete technical scheme of the invention is：
A kind of preservation of avionics system task data and restoration methods, it is characterised in that comprise the following steps：
1) system initialization, registered task data block table is stored in MMM modules to MMM registered task information, and acquisition
Task data, according to the state (initial words of task during upper electricity, it is not necessary to recovery tasks data) of these data recovery tasks.
The task data block table mark required by task data to be saved block message；
2) mission data file table is created according to mission bit stream；
The mission data file table includes the storing path of task names and task data in MMM modules；
3) preservation of task data；
If 3.1) DPM modules normal work, at default breakpoint, task data is preserved；
3.1.1) by searching task data block table, the initial address and length of task data block are obtained；
3.1.2 all task datas) are obtained from internal memory according to the initial address and length of data block, number of tasks is calculated
According to length；
3.1.3) task names, breakpoint are numbered, data length and task data are combined into a complete task data
Bag, task data is sent by NFS to MMM modules, and asks to preserve；
3.1.4 after) MMM modules receive the request for preserving task data, mission data file is searched according to task names
Table, obtains the storing path of mission data file, and task data is written in mission data file；
4) recovery of task status；
4.1) DPM modules break down, and when task is restarted, access task are sent to MMM modules by NFS
The request of data；
4.2) after MMM modules receive the request for accessing task data, mission data file table is searched according to task names,
The path of mission data file is obtained, MMM accesses the mission data file, obtain task data bag, and by network text
Part system returns to request task；
4.3) after DPM modules obtain task data bag, according to task data block table, by the segmentation of task data bag, and according to
Initial address and length in task data block table, task data in internal memory is recovered.
4.4) task jumped to and performed at breakpoint by system according to the breakpoint numbering obtained from MMM modules.
Above-mentioned task data block table mark required by task data to be saved block message includes：Task names, data block are total
Number, the mark of each data block, initial address and length.
Above-mentioned NFS is NFS；The NFS is used to provide remote access file, and DPM modules are long-range by NFS
Access is stored in the task data on MMM.
The advantage of the invention is that：
1st, registered task data block table in the inventive method, enables the data of all pending tasks in system accurate
Divided, the recovery of rear file for it provides good foundation.
2nd, present invention use mission data file table causes to search relatively reliable during task data；
3rd, the method that the present invention is used can effectively solve to be performed discontinuously after task is migrated between DPM modules
Problem, improves avionics system reliability.
Brief description of the drawings
Fig. 1 is fundamental diagram of the invention；
Fig. 2 is workflow schematic diagram of the invention；
Fig. 3 is the remote access schematic diagram of task data.
Extractions and recovery schematic diagram of the Fig. 4 for task data.
Specific embodiment
In comprehensive task processor (IMP), task can be migrated between DPM modules.In order to ensure tasks carrying
Continuity, it is necessary to the state that will finally be preserved before task recovery to migration after task immigration.The present invention is by needed for tasks carrying
The data wanted are stored in MMM modules, after after task immigration, the data required for obtaining tasks carrying from MMM modules, by task
Return to the state preserved before migration, it is ensured that task can be continuously performed.
This method is completed, it is necessary to task data block table, mission data file table, the support of NFS.
Wherein, task data block table for mark required by task data to be saved block message, the information include task names,
Data block total number, the mark of each data block, initial address and length.Task names are the title of current task；Data
Block sum is the data block number of preservation required for application task；It is once A, B, C etc. that data block identifier is then；Data block starting
Address is the first address that data block is stored in internal memory, is the number of 64；Data block length is data block in internal memory
The size in the shared space of storage.Task obtains required by task data to be saved according to the initial address and length of data block.
Also as the foundation of data recovery, the initial address of data block is demonstrated the need for including the task data block of recovery task data block table
Initial address in depositing, length demonstrates the need for the length of recovery tasks data block.
Table 1：Task data block table
Mission data file table is mapping relations of the task names to mission data file, and mission data file is number of tasks
According to storing path.Mission data file table includes the storing path of task names and task data；MMM modules are according to task
Title is searched mission data file table and obtains the path that task data is preserved, and by the path access mission data file, is obtained
Task data.
Mission data file table
| Task names | Mission data file path |
| AM | D:\AM.TXT |
| SM | D:\SM.TXT |
| … | … |
According to Fig. 3, it can be seen that network file is that NFS provides a kind of mechanism for remotely accessing file, and module passes through NFS
Remote access is stored in the task data on MMM.
The method of the present invention is described below according to flow chart：
The method of the present invention is described with reference to Fig. 1 and Fig. 2, the method includes comprising the following steps that：
Step 1) system initialization, in DPM Module registers task data block tables, to MMM registered task information, and obtain guarantor
There is the task data in MMM modules, according to these data recovery tasks state (initial words of task during upper electricity, it is not necessary to
Recovery tasks data).
Task data block table mark required by task data to be saved block message；
Step 2) mission data file table is created according to DPM mission bit streams；
Mission data file table includes the storing path of task names and task data in MMM modules；
Step 3) task data preservation；
Step 3.1) if DPM module normal works, at default breakpoint, preserve task data；
Step 3.1.1) by searching task data block table, obtain the initial address and length of task data block；
Step 3.1.2) all task datas are obtained from internal memory according to the initial address and length of data block, calculating is taken the post as
The length of data of being engaged in；
Step 3.1.3) task names, breakpoint numbering, data length and task data are combined into a complete task
Packet, task data is sent by NFS to MMM modules, and asks to preserve；
Step 3.1.4) MMM modules receive preserve task data request after, according to task names search task data
File table, obtains the storing path of mission data file, and task data is written in mission data file；
Step 4) task status recovery；
Step 4.1) DPM modules break down, and when task is restarted, sent to MMM modules by NFS and accessed
The request of task data；
Step 4.2) MMM modules receive access task data request after, according to task names search task data text
Part table, obtains the path of mission data file, and MMM accesses the mission data file, obtains task data bag, and passed through net
Network file system returns to request task；
Step 4.3) after DPM modules obtain task data bag, according to task data block table, by the segmentation of task data bag, and
According to initial address and length in task data block table, task data in internal memory is recovered, as shown in Figure 4.
Step 4.4) system according to from MMM modules obtain breakpoint numbering, by task jump at breakpoint perform, such as scheme
Shown in 1.
Claims (3)
1. a kind of preservation of avionics system task data and restoration methods, it is characterised in that comprise the following steps：
1) system initialization, in DPM Module registers task data block tables, to MMM registered task information, and acquisition is stored in MMM
Task data in module, according to the state of these data recovery tasks；The DPM modules are data processing module；The MMM
Module is high-capacity storage module；
The task data block table mark required by task data to be saved block message；
2) mission data file table is created according to DPM mission bit streams；
The mission data file table includes the storing path of task names and task data in MMM modules；
3) preservation of task data；
3.1) DPM modules normal work, at default breakpoint, preserves task data；
3.1.1) by searching task data block table, the initial address and length of task data block are obtained；
3.1.2 all task datas, the length of calculating task data) are obtained from internal memory according to the initial address and length of data block
Degree；
3.1.3) task names, breakpoint are numbered, task data length and task data are combined into a complete task data
Bag, task data bag is sent by NFS to MMM modules, and asks to preserve；
3.1.4 after) MMM modules receive the request for preserving task data, mission data file table is searched according to task names, is obtained
The storing path of mission data file is taken, and task data is written in mission data file；
4) recovery of task status；
4.1) DPM modules break down, and when task is restarted, are sent to MMM modules by NFS and access task data
Request；
4.2) after MMM modules receive the request for accessing task data, mission data file table is searched according to task names, is obtained
The path of mission data file, MMM accesses the mission data file, obtains task data bag, and passed through network file system
System returns to request task；
4.3) after DPM modules obtain task data bag, according to task data block table, by the segmentation of task data bag, and according to task
Initial address and length in data block table, task data in internal memory is recovered；
4.4) task jumped to and performed at breakpoint by system according to the breakpoint numbering obtained from MMM modules.
2. the preservation of avionics system task data according to claim 1 and restoration methods, it is characterised in that：It is described
Task data block table mark required by task data to be saved block message includes：Task names, data block total number, each data block
Mark, initial address and length.
3. the preservation of avionics system task data according to claim 1 and 2 and restoration methods, it is characterised in that：
The NFS is NFS；The NFS is used to provide remote access file, and DPM modules are preserved by NFS remote accesses
Task data on MMM.
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