CN107784227A - Onboard system applies guard method and device - Google Patents
Onboard system applies guard method and device Download PDFInfo
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- CN107784227A CN107784227A CN201711168780.0A CN201711168780A CN107784227A CN 107784227 A CN107784227 A CN 107784227A CN 201711168780 A CN201711168780 A CN 201711168780A CN 107784227 A CN107784227 A CN 107784227A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/50—Monitoring users, programs or devices to maintain the integrity of platforms, e.g. of processors, firmware or operating systems
- G06F21/51—Monitoring users, programs or devices to maintain the integrity of platforms, e.g. of processors, firmware or operating systems at application loading time, e.g. accepting, rejecting, starting or inhibiting executable software based on integrity or source reliability
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Abstract
Guard method and device are applied present invention is disclosed a kind of onboard system, wherein method includes：Onboard system reaches the condition of cleaning background application, starts the program for killing application；Obtain running background application, the background application belonged on default white list is placed in first list, the background application that will not belong on white list is placed in second list, white list refer to can not killed application list；Abandon killing the application in first list.Onboard system of the invention applies guard method and device, and the application for running onboard system is excessive and needs are killed when applying, and ensures that core application will not be killed.
Description
Technical field
The present invention relates to onboard system to use field, and especially relate to onboard system applies guard method and dress
Put.
Background technology
With the development of society, the living standard more and more higher of people, the functional requirement to automobile is also more and more diversified.
The onboard system of present automobile typically uses android system, there is many applications in onboard system, including most basic navigation,
Radio, air-conditioning, the in-car entertainment activity of also abundant people have audio player, video player, DVD player, bluetooth etc.,
The various applications such as the reverse image of driving are also aided in, are onboard system control.
Android system has a kind of OOM KILLER mechanism, and it can enable oneself in the case where Installed System Memory exhausts
Algorithm, to operating each application generation oom_adj values, the value is directly proportional with the internal memory of occupancy, then that oom_adj values is inclined
The kill (kill) of high application selectivity falls, and is running memory vacating space, avoids low memory and system occur can not add
The failures such as load.And on this basis, it is easy to some important applications of kill, bad experience is brought to user.
The content of the invention
The main object of the present invention applies guard method and device for a kind of onboard system of offer, protects onboard system
Core application, system is avoided to be killed when clearing up automatically.
In order to realize foregoing invention purpose, the present invention proposes a kind of guard method of applying of onboard system, including step：
Onboard system reaches the condition of cleaning background application, starts the program for killing application；
The application of running background is obtained, the background application belonged on default white list is placed in first list, will
The background application being not belonging on white list is placed in second list, white list refer to can not killed application list；
Abandon killing the application in first list.
Further, the condition of the onboard system cleaning background application, including：
The CPU of onboard system runtime value is higher than the first preset value.
Further, the background application that will not belong on white list is wrapped after being placed on the step in second list
Include：
The application in second list is killed according to default rule.
Further, it is described according to default rule kill second list on application the step of include：
The adj values respectively applied in the second list are obtained, wherein, the adj values represent the killed preferential system of application
Number；
The application in the second list is killed successively according to the order of adj values from high to low, until CPU runtime value is small
When default second preset value, stop the program for killing application.
Further, the acquisition methods of the adj values, including：
According to the run time and frequency of application, adjusted value is generated；
Adjusted value is multiplied by default weight coefficient corresponding to the application, draws the adj values.
The present invention also proposes a kind of application protection device of onboard system, including：
Starting module, the condition of cleaning background application is reached for onboard system, start the program for killing application；
Acquisition module, for obtaining the application of running background, the background application belonged on white list is placed on first
In list, the background application that will not belong on white list is placed in second list, and white list refers to killed to apply
List；
Module is abandoned, for abandoning killing the application in first list.
Further, the starting module includes：
Value cell is run, for judging that the CPU runtime value of onboard system is higher than the first preset value.
Further, the application protection device of the onboard system also includes：
Module is killed, for killing the application in second list according to default rule.
Further, the kill module includes：
Preferred number unit, for obtaining the adj values respectively applied in the second list, wherein, the adj values represent should
With killed preferred number；
Unit is killed, for killing the application in the second list successively according to the order of adj values from high to low, until
When CPU runtime value is less than default second preset value, stop the program for killing application.
Further, the preferred number unit includes：
Adjusted value subelement, for the run time and frequency according to application, generate adjusted value；
Weight subelement, default weight coefficient corresponding to the application is multiplied by for adjusted value, draws the adj values.
Compared with prior art, the beneficial effects of the invention are as follows：The application of onboard system operation is excessive and needs kill should
Important application is protected guarantee in advance and is not killed by used time, user.The application being not protected is arranged according to significance level
Sequence, unessential application is preferentially killed, preferably experienced to user.The application being not protected is set into weight coefficient, optimization is killed
Stubbornly refuse the sequencing of protected application.
Brief description of the drawings
Fig. 1 is the onboard system of one embodiment of the invention using guard method schematic flow sheet；
Fig. 2 is the onboard system of one embodiment of the invention using guard method schematic flow sheet；
Fig. 3 is the onboard system of one embodiment of the invention using guard method schematic flow sheet；
Fig. 4 is the onboard system of one embodiment of the invention using guard method schematic flow sheet；
Fig. 5 is the application protection device structural representation of the onboard system of one embodiment of the invention；
Fig. 6 is the application protection device structural representation of the onboard system of one embodiment of the invention；
Fig. 7 is the application protection device structural representation of the onboard system of one embodiment of the invention；
Fig. 8 is the structural representation of the kill module using protection device of the onboard system of one embodiment of the invention；
Fig. 9 is the structural representation of the preferred number unit using protection device of the onboard system of one embodiment of the invention
Figure.
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Reference picture 1, the embodiment of the present invention provide a kind of guard method of applying of onboard system, including step：
S1, onboard system reach the condition of cleaning background application, start the program for killing application；
S2, the application for obtaining running background, the background application belonged on white list is placed in first list, will not
The background application belonged on white list is placed in second list, white list refer to can not killed application title list；
S3, abandon killing the application in first list.
In the present embodiment, when onboard system run or reach cleaning background application condition, influenceing onboard system just
Often use, be triggered to trigger mechanism, than if desired for when the low memory of onboard system, system is killed with regard to automatic start and applied
Program, discharge running memory, it is ensured that onboard system have abundance running memory.But because the application having is heavier
Will, user needs important application real time execution, is reluctant to be killed.White list is exactly the inventory of the name of these important applications,
When starting the program for killing application, the program of running background is compared with white list one by one, if background application is white
On list, then it is placed in first list, if background application is placed in second list not on white list, therefore starts and kill
Killed application is placed in first list after dead program, then the application in the list is abandoned killing.
Reference picture 2, further, the condition of the onboard system cleaning background application, including：
S11, the CPU runtime value of onboard system are higher than the first preset value.
In the present embodiment, CPU runtime value, refer to the ratio for the running memory that CPU takes, if CPU runtime values are too high, surpass
Go out the size of running memory, internal memory can be caused to overflow, whole application exception, in some instances it may even be possible to allow whole system to collapse.Set
First preset value, such as the first preset value are arranged to 85%, when the ratio of the running memory of CPU occupancy is higher than 85%, explanation
System may collapse, thus send the signal for killing application, mitigate CPU operation, running memory is discharged space, protect
Hinder the normal operation of whole onboard system.If CPU is less than the first preset value, illustrates the load for being also not reaching to saturation, also fill
The running memory space of foot, it can also continue to open application, application need not be killed.
Reference picture 3, further, the background application that will not belong on white list are placed on the step in second list
Also include afterwards：
S4, according to default rule kill second list on application.
In the present embodiment, after CPU runtime value is higher, it is necessary to kill the application that can be killed.According to user not
Same demand, different rules is set to kill the application in second list.Specifically, such as kill all should in second list
With, or kill the application of the internal memory half in the top in second list.Its default rule purpose is for guarantee and killed
Before onboard system is returned to trigger mechanism after dead application, allow onboard system can be with normal use.
Reference picture 4, further, described killed according to default rule include in second list using the step of S4：
S41, the adj values respectively applied in the second list are obtained, wherein, the adj values represent that application is killed excellent
First coefficient；
S42, application in the second list is killed according to the order of adj values from high to low successively, until CPU operation
When value is less than default second preset value, stop the program for killing application.
Wherein, step S42 detailed process is：
S421, after killing the application of adj values highest, obtain CPU current runtime value；
S422, judge whether current runtime value is higher than the second preset value, if so, then return to step S421；
S423, if it is not, stop it is described kill application program.
In the present embodiment, adj values with can be with killed rank positive correlation.Using more inessential, the rank that can be killed is got over
It is high.Adj values are higher, should using it is fewer.If some using time it is very long, the adj values that generate can relatively
It is low, it is more likely that to be the application that user needs to be commonly used, if will cross meeting user after its kill and opened the application again, obtained
Mistake is not repaid, therefore is killed successively from high to low according to the adj values of application, and the process priority for making often not apply is killed.This hair
Bright purpose is to kill unessential application after the runtime value of onboard system is too high, ensures the stable fortune of whole onboard system
OK.Therefore during application is killed, CPU current runtime value is also monitored in real time, if kill will be applied very low to CPU
When, onboard system also be able to need not just be killed with very outstanding quickly state operation, then remaining application.Kill application
Make runtime value low to can ensure that onboard system quickly runs.Its second preset value is that quickly operation is run system with non-rapid
Critical value, thus the second preset value is lower than the first preset value, such as it is arranged to 40%.Therefore adj value highest applications are killed
Afterwards, CPU runtime value is also obtained, judges whether runtime value is less than the second preset value, if after killing an application,
CPU runtime value is 50%, then continues to kill the application that adj values are number two, if killing the application that adj values are number two
Afterwards, CPU runtime value is 35%, less than the second preset value, then stops killing application, onboard system continues normal operation.Need
It should be noted that kill adj values highest application after, in second list the application be just not present, in original second list
The high application of adj values second is just updated to adj value highest applications, therefore is killed successively according to the height of adj values, according to the stream
Journey always kills adj values highest application in current second list.
Further, the acquisition process of the adj values includes：
According to the run time and frequency of application, adjusted value is generated；
Adjusted value is multiplied by default weight coefficient corresponding to the application, draws the adj values.
In the present embodiment, although because the time of some applications operation is short, and it is not in white list, is again
Important, user is not intended to this application can be compared this in system using setting in advance by preferential kill, user
Low weight coefficient so that although time short frequency that the application uses is low, but its adj value is still than relatively low.Also have
Although using using relatively frequently, inessential for user, user wishes that this application is prior by preferential kill, user
Higher weight coefficient is set to the application in system.For example, user likes listening to radio, by this application of radio
Weight coefficient be arranged to 0.5, user is very familiar to road conditions, less using navigation, by the weight system for this application of navigating
Number is arranged to 1.5.After onboard system operation a period of time, CPU runtime value is higher, it is necessary to kill some applications.Radio and
Navigation is not the run time that system is applied according to the two and the conventional frequency used, to calculate receipts in white list
The importance value of sound machine is 100, and then with 50 weight coefficients 0.5 for being multiplied by radio, the adj values for drawing radio are 50；Simultaneously
The importance value for calculating navigation is 80, and then with 80 weight coefficients 1.5 for being multiplied by navigation, the adj values for drawing navigation are 120.System
System is preferential to kill the higher navigation application of adj values when killing application program.
In summary, the application guard method of onboard system of the invention, the application of onboard system operation is excessive and needs
When killing application, important application is protected guarantee in advance and is not killed by user.The adj values of inessential application are obtained, it is excellent
Unessential application is first killed, is preferably experienced to user.Will be not protected application set weight coefficient, optimization kill not by
The sequencing of the application of protection.
Reference picture 5-9, the present invention also propose the application protection device of the onboard system of an embodiment, including：
Starting module 1, the condition of cleaning background application is reached for onboard system, start the program for killing application；
Acquisition module 2, for obtaining the application of running background, the background application belonged on white list is placed on first
In list, the background application that will not belong on white list is placed in second list, and white list refers to killed to apply
Title list；
Module 3 is abandoned, for abandoning killing the application in first list.
In the present embodiment, when onboard system run or reach cleaning background application condition, influenceing onboard system just
Often use, be triggered to trigger mechanism, than if desired for when the low memory of onboard system, starting module 1 is killed with regard to automatic start
The program extremely applied, discharges running memory, it is ensured that onboard system has the running memory of abundance.But because the application having is ratio
More important, user needs important application real time execution, is reluctant to be killed.White list is exactly the clear of the name of these important applications
Single, when starting the program for killing application, the program of running background is compared acquisition module 2 with white list one by one, if
Background application is then placed in first list on white list, if background application is placed on second list not on white list
It is interior, therefore killed application is placed in first list by acquisition module 2 after startup kill program, and then abandon module
Application in 3 pairs of lists is abandoned killing, and plays a part of protecting the application.
Further, the starting module 1 includes：
Value cell 11 is run, for judging that the CPU runtime value of onboard system is higher than the first preset value.
In the present embodiment, CPU runtime value refers to the ratio for the running memory that CPU takes, and is obtained if running value cell 11
CPU runtime values it is too high, beyond the size of running memory, internal memory can be caused to overflow, whole application exception, in some instances it may even be possible to allow
Whole system is collapsed.Set the first preset value, such as the first preset value to be arranged to 85%, make the ratio of the running memory of CPU occupancy
When example is higher than 85%, explanation system may collapse, thus issue unit 12 sends the signal for killing application, mitigates CPU fortune
OK, running memory is discharged space, ensure the normal operation of whole onboard system.If CPU is less than the first preset value, explanation
The load of saturation is also not reaching to, also has sufficient running memory space, can also continue to open application, need not kill should
With.
Further, the application protection device of the onboard system also includes：
Module 4 is killed, for killing the application in second list according to default rule.
In the present embodiment, after CPU runtime value is higher, it is necessary to kill module 4 and kill the application that can be killed.According to
The different demands of user, different rules is set to kill the application in second list.Specifically, such as kill in second list
All applications, or kill the application of the internal memory half in the top in second list.Its default rule purpose is for
Before onboard system is returned to trigger mechanism after guarantee kill application, allow onboard system can be with normal use.
Further, the kill module 4 includes：
Preferred number unit 41, for obtaining the adj values respectively applied in the second list, wherein, the adj values represent
Using killed preferred number；
Unit 42 is killed, for killing the application in the second list successively according to the order of adj values from high to low, directly
When being less than default second preset value to CPU runtime value, stop the program for killing application.
Wherein, killing unit 42 includes：
Highest subelement 421 is killed, after killing the application of adj values highest, obtains CPU current runtime value；
Judgment sub-unit 422, for judging whether current runtime value is higher than the second preset value；
First judges subelement 423, if being higher than the second preset value for current runtime value, calls and kills unit 42；
Second judges subelement 424, if being not higher than the second preset value for current runtime value, stops the kill application
Program.
In the present embodiment, adj values with can be with killed rank positive correlation.Using more inessential, the rank that can be killed is got over
High adj values are higher, should using it is fewer.If some using time it is very long, the adj values that generate can relatively
It is low, it is more likely that to be the application that user needs to be commonly used, if will cross meeting user after its kill and opened the application again, obtained
Do not repay mistake, therefore kill adj value kill from high to low of the unit 42 according to application, the process priority for making often not apply is killed
Extremely.The purpose of the present invention is to kill unessential application after the runtime value of onboard system is too high, ensures whole onboard system
Stable operation.Therefore during application is killed, CPU current operation will also be obtained in real time by killing highest subelement 421
Value, at the same judgment sub-unit 422 judge current runtime value whether less than ensure onboard system it is outstanding quickly run it is second pre-
If value, if will apply kill to CPU it is very low when, second judges that subelement 424 judges CPU current runtime value less than or equal to pre-
If value, onboard system is set also need not just to be killed with very outstanding quickly state operation, then remaining application, therefore
Second judges that subelement 424 stops killing the program of application.Killing application makes runtime value low to can ensure that onboard system is quick
Operation.Its second preset value is the system critical value that quickly operation is run with non-rapid, thus the second preset value is more default than first
Value is low, such as is arranged to 40%.Therefore after killing the application of adj values highest, CPU runtime value is also obtained, is judged sub single
Member 422 judges whether runtime value is less than the second preset value, if after killing an application, CPU runtime value is 50%, then
First judgement subelement 423 judges be higher than the second preset value, calls and kills highest subelement 421 and continue kill adj values ranking the
Two application, if after killing the application that adj values are number two, CPU runtime value is 35%, and second judges subelement 424
Judge that runtime value is less than the second preset value, then stop killing application, onboard system continues normal operation.It should be noted that
Kill adj values highest application after, in second list the application be just not present, adj values second are high in original second list
Application be just updated to adj value highest applications, therefore kill according to the height of adj values, always killed according to the flow successively
Adj value highest applications in current second list.
Further, the preferred number unit 41 includes：
Adjusted value subelement 411, for the run time and frequency according to application, generate adjusted value；
Weight subelement 412, default weight coefficient corresponding to the application is multiplied by for adjusted value, draws the adj values.
In the present embodiment, although because the time of some applications operation is short, and it is not in white list, is again
Important, user is not intended to this application can be compared this in system using setting in advance by preferential kill, user
Low weight coefficient so that although time short frequency that the application uses is low, but its adj value is still than relatively low.Also have
Although using using relatively frequently, inessential for user, user wishes that this application is prior by preferential kill, user
Higher weight coefficient is set to the application in system.For example, user likes listening to radio, by this application of radio
Weight coefficient be arranged to 0.5, user is very familiar to road conditions, less using navigation, by the weight system for this application of navigating
Number is arranged to 1.5.After onboard system operation a period of time, CPU runtime value is higher, it is necessary to kill some applications.Radio and
Navigation is not in white list, and importance value subelement 411 is according to the run time that the two are applied and the conventional frequency used
Rate, the importance value for calculating radio are 100, and then 50 weight coefficients 0.5 for being multiplied by radio of weight subelement 412, are obtained
The adj values for going out radio are 50；The importance value that importance value subelement 411 calculates navigation simultaneously is 80, then weight subelement
412 with 80 weight coefficients 1.5 for being multiplied by navigation, and the adj values for drawing navigation are 120.System is preferentially killed when killing application program
The higher navigation application of dead adj values.
In summary, the application protection device of onboard system of the invention, the application of onboard system operation is excessive and needs
When killing application, important application is protected guarantee in advance and is not killed by user.By the application being not protected according to important
Degree sorts, and preferentially kills unessential application, is preferably experienced to user.The application being not protected is set into weight coefficient,
The sequencing for the application being not protected is killed in optimization.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the invention, every utilization
The equivalent structure or equivalent flow conversion that description of the invention and accompanying drawing content are made, or directly or indirectly it is used in other correlations
Technical field, be included within the scope of the present invention.
Claims (10)
1. a kind of onboard system applies guard method, it is characterised in that including step：
Onboard system reaches the condition of cleaning background application, starts the program for killing application；
The application of running background is obtained, the background application belonged on default white list is placed in first list, will not be belonged to
Be placed in the background application on white list in second list, white list refer to can not killed application list；
Abandon killing the application in first list.
2. onboard system as claimed in claim 1 applies guard method, it is characterised in that the onboard system cleaning backstage
The condition of application, including：
The CPU of onboard system runtime value is higher than the first preset value.
3. onboard system as claimed in claim 1 applies guard method, it is characterised in that described to will not belong on white list
The step that is placed in second list of background application after include：
The application in second list is killed according to default rule.
4. onboard system as claimed in claim 3 applies guard method, it is characterised in that described to be killed according to default rule
The step of application in dead second list, includes：
The adj values respectively applied in the second list are obtained, wherein, the adj values represent to apply killed preferred number；
The application in the second list is killed successively according to the order of adj values from high to low, until CPU runtime value is less than in advance
If the second preset value when, stop it is described kill application program.
5. onboard system as claimed in claim 4 applies guard method, it is characterised in that the acquisition methods of the adj values,
Including：
According to the run time and frequency of application, adjusted value is generated；
Adjusted value is multiplied by default weight coefficient corresponding to the application, draws the adj values.
A kind of 6. application protection device of onboard system, it is characterised in that including：
Starting module, the condition of cleaning background application is reached for onboard system, start the program for killing application；
Acquisition module, for obtaining the application of running background, the background application belonged on white list is placed on first list
Interior, the background application that will not belong on white list is placed in second list, white list refer to can not killed application name
It is single；
Module is abandoned, for abandoning killing the application in first list.
7. the application protection device of onboard system as claimed in claim 6, it is characterised in that the starting module includes：
Value cell is run, for judging that the CPU runtime value of onboard system is higher than the first preset value.
8. the application protection device of onboard system as claimed in claim 6, it is characterised in that also include：
Module is killed, for killing the application in second list according to default rule.
9. the application protection device of onboard system as claimed in claim 8, it is characterised in that the kill module includes：
Preferred number unit, for obtaining the adj values respectively applied in the second list, wherein, the adj values represent to apply quilt
The preferred number of kill；
Unit is killed, for killing the application in the second list successively according to the order of adj values from high to low, until CPU
Runtime value when being less than default second preset value, stop the program for killing application.
10. the application protection device of onboard system as claimed in claim 9, it is characterised in that the preferred number unit bag
Include：
Adjusted value subelement, for the run time and frequency according to application, generate adjusted value；
Weight subelement, default weight coefficient corresponding to the application is multiplied by for adjusted value, draws the adj values.
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| CN201711168780.0A CN107784227A (en) | 2017-11-21 | 2017-11-21 | Onboard system applies guard method and device |
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Application publication date: 20180309 |