CN102110147B - Cache-based CAD file data unloading method and device - Google Patents
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Abstract
The invention discloses a cache-based computer aided design (CAD) file data unloading method and a cache-based CAD file data unloading device. The cache-based CAD file data unloading method comprises the following steps of: a, acquiring the access rate of each data object of a CAD file in a memory; b, comparing the access rate with the preset access rate; and c, when the access rate is smaller than the preset access rate, unloading the data object of the CAD file to a cache from the memory. According to the method and the device, the memory occupied by a large amount of CAD file data during use can be reduced, and the overall efficiency of software operation is improved.
Description
Technical field
The invention belongs to computer realm, relate to a kind of cad file data discharging method and device based on buffer memory.
Background technology
Along with three-dimensional CAD software in manufacturing industry, especially in the widespread use of equipment industry, the handled model of software is also in continuous increase.By the speed reduction unit model of an initial hundreds of part, the whole vehicle model of several ten thousand parts till now and big machinery general assembly make the model data file be increased to hundreds of MB by original hundreds of KB.So just software performance and internal memory use amount have been proposed new requirement.
For example: in the process of using a speed reduction unit assembling that more than 100 part arranged, committed memory is less than 100MB, and in the process of using a big machinery assembling that 30,000 parts are arranged, the internal memory that need take is near 2GB.This is that general user institute is intolerable.Although the user can improve speed to a certain extent through improving Hardware configuration; Solve the memory consumption problem, but for part count big assembling up to ten thousand, the effect that only promotes Hardware configuration is just no longer so obvious; And under 32 systems of Windows XP; The shared internal memory maximum constraints of each process is 3GB, and when surpassing this restriction, software will directly withdraw from unusually.Therefore, must make essence from software algorithm and improve, so just can make software that the lifting of matter is arranged on performance, thereby satisfy the further needs of enterprise.
For in the prior art in using the process of a large amount of cad file data committed memory too much, cause running software speed slack-off gradually, even might unusual problem take place because of low memory, effective solution is not proposed at present as yet.
Summary of the invention
The purpose of this invention is to provide a kind of cad file data discharging method and device based on buffer memory; Too much in order to solution committed memory in the process of using a large amount of cad file data; Cause running software speed slack-off gradually, even might unusual problem take place because of low memory.
To achieve these goals, according to an aspect of the present invention, a kind of cad file data discharging method based on buffer memory is provided, the present invention adopts following technical scheme:
A kind of cad file data discharging method based on buffer memory comprises the steps:
A: the rate of people logging in that obtains each data object of cad file in the internal memory;
B: rate of people logging in and preset rate of people logging in are compared; And
C:, the object of cad file data is unloaded in the buffer memory from internal memory when rate of people logging in during less than preset rate of people logging in.
Further, step a comprises: create and reclaim timer; And through reclaiming timer calculating rate of people logging in.
Further, reclaiming timer calculating rate of people logging in comprises:
The part container that loads the cad file data is recorded in the loading tabulation;
Judge according to loading tabulation whether the cad file data are visited, and when the cad file data are visited, renewal cad file data at last by access time and access times;
Detect the loading tabulation through reclaiming timer, and the detection time and the update time of obtaining the cad file data;
Through detection time and update time the CALCULATION CAD file data free time; And
Calculate rate of people logging in according to free time with by access times; Wherein, the formula that comprises following calculating in the above-mentioned steps: free time=detection time-update time; Rate of people logging in=access times/free time.
Further, among the step c, the cad file data be unloaded in the buffer memory from internal memory comprise:
Part container through loading in the tabulation is searched the cad file data of rate of people logging in less than preset rate of people logging in; And the object of rate of people logging in less than the cad file data of preset rate of people logging in be unloaded in the buffer memory from internal memory.
Further, the part container comprises the part assemblies container.
Further, step b comprises: during greater than preset rate of people logging in, return step a at rate of people logging in.
According to another aspect of the present invention, a kind of cad file data discharge mechanism based on buffer memory is provided, the present invention adopts following technical scheme:
A kind of cad file data discharge mechanism based on buffer memory comprises:
Acquisition module is used for obtaining the rate of people logging in of each data object of internal memory cad file;
Comparison module is used for rate of people logging in and preset rate of people logging in are compared; And
Unload module is used for, the object of rate of people logging in less than the cad file data of preset rate of people logging in being unloaded in the buffer memory from internal memory during less than preset rate of people logging at rate of people logging in.
Further, acquisition module comprises: create module, be used for creating the recovery timer; And computing module, be used for calculating rate of people logging in through reclaiming timer.
Further, computing module comprises:
Logging modle is used for the part container that loads the cad file data is recorded the loading tabulation;
Judge module is used for judging according to loading tabulation whether the cad file data are visited, and when the cad file data are visited, renewal cad file data at last by access time and access times;
Detection module is used for detecting the loading tabulation through reclaiming timer, and the detection time and the update time of obtaining the cad file data;
First calculating sub module, be used for through detection time and update time the CALCULATION CAD file data free time; And
Second calculating sub module is used for calculating rate of people logging in according to free time and access times; Wherein, the formula that comprises following calculating: free time=detection time-update time; Rate of people logging in=access times/free time.
Further, Unload module comprises:
Search module, be used for searching the file data of rate of people logging in less than preset rate of people logging in through the part container that loads tabulation; And the unloading submodule, the object of file data is unloaded in the buffer memory from internal memory.
Through the present invention, adopt cad file data discharging method to comprise the steps: a: the rate of people logging in that obtains each data object of cad file in the internal memory based on buffer memory; B: rate of people logging in and preset rate of people logging in are compared; And c: when rate of people logging in during less than preset rate of people logging in; From internal memory, be unloaded to the object of cad file data in the buffer memory; It is too much to have solved in the prior art in the process of using a large amount of cad file data committed memory, causes running software speed slack-off gradually, even might unusual problem take place because of low memory; And then reached save memory in the process of using a large amount of cad file data, improve the overall operation efficient of three dimensional CAD system and the effect of performance.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is according to the structural representation of the embodiment of the invention based on the cad file data discharge mechanism of buffer memory;
Fig. 2 is according to the structural representation of the embodiment of the invention based on computing module in the cad file data discharge mechanism of buffer memory;
Fig. 3 is according to the process flow diagram of the embodiment of the invention based on the cad file data discharging method of buffer memory;
Fig. 4 is according to the process flow diagram of the preferred embodiment of the present invention based on the cad file data discharging method of buffer memory;
Fig. 5 is the synoptic diagram according to part memory structure in the cad file data of the embodiment of the invention.
Embodiment
Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.Below with reference to accompanying drawing and combine embodiment to specify the present invention.
Fig. 1 is according to the structural representation of the embodiment of the invention based on the cad file data discharge mechanism of buffer memory; Fig. 2 is according to the structural representation of the embodiment of the invention based on computing module in the cad file data discharge mechanism of buffer memory.As shown in Figure 1, this device can comprise: acquisition module 1 is used for obtaining the rate of people logging in of each data object of internal memory cad file; Comparison module 3 is used for rate of people logging in and preset rate of people logging in are compared; And Unload module 5, be used for during less than preset rate of people logging in, the cad file data of rate of people logging in less than preset rate of people logging in being unloaded in the buffer memory from internal memory at rate of people logging in.
In the above-described embodiments, the cad file data are the low too much internal memory of data occupancy of some rates of people logging in the process of using, and acquisition module can be added up the rate of people logging in of each data in using, thereby obtains the rate of people logging in of each data.Comparison module can compare the rate of people logging in and the preset rate of people logging in of CAD system of each data, if the rate of people logging in of certain data is lower than the preset rate of people logging in of CAD system, then these data is unloaded in the buffer memory from internal memory.Acquisition module is regularly added up the rate of people logging in of each data in using, every statistics once after, comparison module compares rate of people logging in and preset rate of people logging in, repeats above-mentioned uninstall process.Through above-mentioned embodiment; It is too much that the present invention can solve in using the process of a large amount of cad file data committed memory; Cause running software speed slack-off gradually; Even might unusual problem take place because of low memory, and practiced thrift shared internal memory in the system handles cad file data procedures, improved the overall operation efficient and the performance of three dimensional CAD system further.
Preferably, the acquisition module 1 in the foregoing description can comprise: create module 11, be used for creating the recovery timer; And computing module 13, be used for calculating rate of people logging in through reclaiming timer.Recovery timer among this embodiment can travel through at set intervals and once load tabulation; The computation-free time; Free time is exactly the current supervision time to deduct the last access time, the free time that the system that makes can unified management obtains, has improved the efficient of calling of system.
Preferably, as shown in Figure 2, the computing module 13 in the above embodiment of the present invention can comprise: logging modle 131 is used for the part container that loads the cad file data is recorded the loading tabulation of CAD system; Judge module 133 is used for judging according to loading tabulation whether the cad file data are visited, and when the cad file data are visited, renewal cad file data at last by access time and access times; Detection module 135 is used for detecting the loading tabulation through reclaiming timer, and the detection time and the update time of obtaining the cad file data; First calculating sub module 137, be used for through detection time and update time the CALCULATION CAD file data free time; And second calculating sub module 139, be used for calculating rate of people logging in according to free time and access times.This embodiment has improved the performance of system through reclaiming regularly update and load tabulation of timer.
Preferably, comparison module 3 can comprise: return module 31, be used for during greater than preset rate of people logging in, returning computing module at rate of people logging in.
In the above-described embodiments, when rate of people logging in during greater than the preset rate of people logging in of system, turn back to computing module 13, computing module 13 calculates rate of people logging in through reclaiming timer again.
Preferably, Unload module 5 can comprise: search module 51, be used for searching the file data of rate of people logging in less than preset rate of people logging in through the part container that loads tabulation; And unloading submodule 53, file data is unloaded in the buffer memory from internal memory.
Fig. 3 is according to the process flow diagram of the embodiment of the invention based on the cad file data discharging method of buffer memory.This method comprises the steps:
Step a: the rate of people logging in that obtains each data object of cad file in the internal memory through the acquisition module among Fig. 11;
Step b: realize rate of people logging in and preset rate of people logging in are compared through the comparison module among Fig. 13; And
Step c: realize through the Unload module among Fig. 15,, the cad file data are unloaded in the buffer memory from internal memory when rate of people logging in during less than preset rate of people logging in.
In the above-described embodiments, the cad file data are the low too much internal memory of data occupancy of some rates of people logging in the process of using, and step a can add up the rate of people logging in of each data in using, thereby obtains the rate of people logging in of each data.Step b can compare the rate of people logging in and the preset rate of people logging in of CAD system of each data, if the rate of people logging in of certain data is lower than the preset rate of people logging in of CAD system, then through step c these data is unloaded in the buffer memory from internal memory.Step a regularly adds up the rate of people logging in of each data in using, every statistics once after, step b compares rate of people logging in and preset rate of people logging in, the uninstall process of repetition above-mentioned steps c.It is too much that the present invention can solve in using the process of a large amount of cad file data committed memory; Cause running software speed slack-off gradually; Even might unusual problem take place because of low memory; Practice thrift shared internal memory in the system handles cad file data procedures, improved the overall operation efficient and the performance of three dimensional CAD system further.
Step a in the above embodiment of the present invention can comprise: create and reclaim timer; And through reclaiming timer calculating rate of people logging in.
Preferably, can comprise through the step that reclaims timer calculating rate of people logging in: the part container that will load the cad file data records and loads in the tabulation; Judge according to loading tabulation whether the cad file data are visited, and when the cad file data are visited, renewal cad file data at last by access time and access times; Detect the loading tabulation through reclaiming timer, and the detection time and the update time of obtaining the cad file data; Through detection time and update time the CALCULATION CAD file data free time; And according to free time with by access times calculating rate of people logging in; Wherein, the formula that comprises following calculating in the above-mentioned steps: free time=update time detection time; Rate of people logging in=access times/free time.
In the step c of the foregoing description, step is unloaded to the cad file data in the buffer memory and can comprises from internal memory: the part container through loading in the tabulation is searched the cad file data of rate of people logging in less than preset rate of people logging in; And the object of rate of people logging in less than the cad file data of preset rate of people logging in be unloaded in the buffer memory from internal memory.
Preferably, the part container among above-mentioned any embodiment can comprise the part assemblies container.
In the present invention's the foregoing description shown in Figure 3, step b can comprise: during greater than preset rate of people logging in, return step a at rate of people logging in.
Fig. 4 is according to the process flow diagram of the preferred embodiment of the present invention based on the cad file data discharging method of buffer memory.In conjunction with Fig. 3 and shown in Figure 4, specific embodiment of the present invention is following:
Step S101, CAD software can create a recovery timer after startup, when loading the cad file data, the part that the part container will be loaded records in the loading tabulation in the CAD system.
Step S103 reclaims timer and can travel through once loading tabulation at set intervals.Judge according to loading tabulation whether part or part group are visited, and when part or part group were visited, more new parts or part group were at last by access time and access times.Detect the loading tabulation through reclaiming timer, and the detection time and the update time of obtaining part or part group.Through the free time (free time is exactly the current detection time to deduct the last access time) of calculating detection time and update time part or part group, the formula of calculating is: free time=detection time-update time.
Step S105, according to free time and access times calculating rate of people logging in, the formula of calculating is: rate of people logging in=access times/free time.Rate of people logging in visited number of times and free time two factor affecting, when access times are many more, the possibility of visiting him after so once more is big more, free time is big more, the possibility of visiting him so once more is few more.
Step S107 when rate of people logging in during less than preset rate of people logging in, just judges that this part or part assemblies temporarily can not be used, and can be unloaded in the buffer memory from internal memory.If rate of people logging in during greater than preset rate of people logging in, returns the S103 step.
Step S109, when rate of people logging in during less than preset rate of people logging in, part or part assemblies will be unloaded in the buffer memory from internal memory.But the part container or the part assemblies container that record this part or part assemblies reference position and size are not uninstalled.
When we need visit certain part or part group again, seek part or the position of part assemblies in document data flow again through part container or part assemblies container, thereby realize the loading of part or part assemblies.
When opening the cad file data, document data flow is all put into buffer memory, and CAD software loads file data simultaneously; Usually the kit of CAD processing contains a large amount of parts, and a part includes a plurality of part assemblies simultaneously, and we are in the middle of the process that device is operated; Very high to some part or part assemblies rate of people logging in; Very low to some part or part assemblies rate of people logging in, not even visit is to this kind situation; Realize that through the above embodiment of the present invention step cad file data discharging method based on buffer memory is very low or the part of not visiting unloads with rate of people logging in, thereby improve the operational efficiency of CAD system.
Fig. 5 is the synoptic diagram according to part memory structure in the cad file data of the embodiment of the invention.As shown in Figure 5, a part is made up of several part assemblies, has stored the data of part type in each part assemblies.In order to realize dynamic load, pack the part object with the part container of a lightweight respectively, this part container records reference position and the size of this part object in document data flow; Part assemblies container with a lightweight is packed the part assemblies object, and this part assemblies container records reference position and the size of this part assemblies object in data stream.Part container and part assemblies container all are the lightweight data, committed memory seldom, part object and part assemblies to as if the heavyweight data, committed memory is more.When visit heavyweight datarams, must can't directly visit the internal memory of heavyweight data outside that is to say through the container of lightweight.
If want to obtain the color data of certain part, must be at first through this part of part container visit, the part container can judge that part that it packs is whether in internal memory simultaneously; If do not exist; Will make up this part object through buffer memory, then, the part object can find the part assemblies container of storage color; The part assemblies container judges that whether part assemblies that it packs is at internal memory; If do not exist, use buffer memory to make up the part assemblies object equally, obtain the color data of this part then by the part assemblies object.At this moment, just have a part object and a part assemblies object is loaded into internal memory.
Realize through the foregoing description, during the external reference part data, must be through part container and part assemblies container, even therefore part and part assemblies object uninstall from internal memory, can not cause illegal memory to visit yet.When part data is really asked in the outside, can rebuild part and part assemblies object by container through data flow cache through the dynamic load technology again, reach the perfect adaptation of dynamic load and dynamic offloading.
From above description, can find out that the present invention has realized following technique effect: to prior art problems, the present invention is based on the dynamic data Unloading Technology of buffer memory, solved File Open after, the too much problem of committed memory in the use.Make three-dimensional CAD software further adapt to the demand on using technically again, for enterprise production provides strong technical guarantee.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the memory storage and carry out, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize by calculation element.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. the cad file data discharging method based on buffer memory is characterized in that, comprising:
A: obtain the rate of people logging in of each data object of cad file in the internal memory, said step a comprises: create and reclaim timer; And calculate said rate of people logging in through said recovery timer;
B: said rate of people logging in and preset rate of people logging in are compared; And
C:, from said internal memory, be unloaded to the object of said cad file data in the said buffer memory when said rate of people logging in during less than said preset rate of people logging in;
Wherein, saidly calculate said rate of people logging in through said recovery timer and comprise: the part container that will load said cad file data records and loads in the tabulation; Judge according to said loading tabulation whether said cad file data are visited, and when said cad file data are visited, upgrade said cad file data at last by access time and access times; Detect said loading tabulation through said recovery timer, and the detection time and the update time of obtaining said cad file data; Through said detection time and free time of calculating said cad file data update time, computing formula is: free time=detection time-update time; And according to said free time with saidly calculated said rate of people logging in by access times, computing formula is: rate of people logging in=access times/free time.
2. cad file data discharging method according to claim 1 is characterized in that, in said step c, said cad file data are unloaded in the buffer memory from internal memory comprise:
Said part container through in the said loading tabulation is searched the cad file data of rate of people logging in less than said preset rate of people logging in; And
The object of said rate of people logging in less than the cad file data of said preset rate of people logging in is unloaded in the said buffer memory from said internal memory.
3. cad file data discharging method according to claim 1 and 2 is characterized in that said part container comprises the part assemblies container.
4. cad file data discharging method according to claim 1 is characterized in that said step b comprises:
During greater than said preset rate of people logging in, return step a at said rate of people logging in.
5. the cad file data discharge mechanism based on buffer memory is characterized in that, comprising:
Acquisition module is used for obtaining the rate of people logging in of each data object of internal memory cad file, and said acquisition module comprises: create module, be used for creating and reclaim timer; And computing module, be used for calculating said rate of people logging in through said recovery timer;
Comparison module is used for said rate of people logging in and preset rate of people logging in are compared; And
Unload module is used at said rate of people logging in during less than said preset rate of people logging in, from said internal memory is unloaded in said buffer memory less than the object of the cad file data of said preset rate of people logging in said rate of people logging in;
Wherein, said computing module comprises: logging modle is used for the part container that loads said cad file data is recorded the loading tabulation; Judge module is used for judging according to said loading tabulation whether said cad file data are visited, and when said cad file data are visited, upgrade said cad file data at last by access time and access times; Detection module is used for detecting said loading tabulation through said recovery timer, and the detection time and the update time of obtaining said cad file data; First calculating sub module was used for through said detection time and free time of calculating said cad file data update time, and computing formula is: free time=detection time-update time; And second calculating sub module, being used for calculating said rate of people logging in according to said free time and said access times, computing formula is: rate of people logging in=access times/free time.
6. cad file data discharge mechanism according to claim 5 is characterized in that said Unload module comprises:
Search module, be used for searching the file data of rate of people logging in less than said preset rate of people logging in through the said part container of said loading tabulation; And
The unloading submodule unloads the object of said file data in the said buffer memory from said internal memory.
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| US5859646A (en) * | 1993-06-04 | 1999-01-12 | Kabushiki Kaisha Toshiba | Graphic drawing processing device and graphic drawing processing system using thereof |
| CN1731374A (en) * | 2005-08-25 | 2006-02-08 | 北京中星微电子有限公司 | A cache prefetch module and method thereof |
| CN101388018A (en) * | 2007-09-13 | 2009-03-18 | 英业达股份有限公司 | Computer aided design document management method |
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| US5859646A (en) * | 1993-06-04 | 1999-01-12 | Kabushiki Kaisha Toshiba | Graphic drawing processing device and graphic drawing processing system using thereof |
| CN1731374A (en) * | 2005-08-25 | 2006-02-08 | 北京中星微电子有限公司 | A cache prefetch module and method thereof |
| CN101388018A (en) * | 2007-09-13 | 2009-03-18 | 英业达股份有限公司 | Computer aided design document management method |
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Owner name: CAXA TECHNOLOGY CO., LTD. Free format text: FORMER NAME: BEIJING DIGITAL DAFANG TECHNOLOGY CO., LTD. |
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Address after: 100080, Room 802, satellite building, No. 63, Zhichun Road, Beijing, Haidian District Patentee after: Beijing CAXA Technology Co., Ltd. Address before: 100080, Room 802, satellite building, No. 63, Zhichun Road, Beijing, Haidian District Patentee before: Beijing Digital Dafang Technology Co., Ltd. |